diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:50:36 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 18:50:36 +0000 |
commit | 50ba0232fd5312410f1b65247e774244f89a628e (patch) | |
tree | fd8f2fc78e9e548af0ff9590276602ee6125be00 /tools/testing/selftests/mm | |
parent | Releasing progress-linux version 6.7.12-1~progress7.99u1. (diff) | |
download | linux-50ba0232fd5312410f1b65247e774244f89a628e.tar.xz linux-50ba0232fd5312410f1b65247e774244f89a628e.zip |
Merging upstream version 6.8.9.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/mm')
-rw-r--r-- | tools/testing/selftests/mm/Makefile | 4 | ||||
-rw-r--r-- | tools/testing/selftests/mm/compaction_test.c | 91 | ||||
-rw-r--r-- | tools/testing/selftests/mm/cow.c | 183 | ||||
-rw-r--r-- | tools/testing/selftests/mm/hugepage-mmap.c | 23 | ||||
-rw-r--r-- | tools/testing/selftests/mm/hugepage-mremap.c | 87 | ||||
-rw-r--r-- | tools/testing/selftests/mm/khugepaged.c | 410 | ||||
-rw-r--r-- | tools/testing/selftests/mm/mremap_test.c | 27 | ||||
-rwxr-xr-x | tools/testing/selftests/mm/run_vmtests.sh | 55 | ||||
-rw-r--r-- | tools/testing/selftests/mm/thp_settings.c | 349 | ||||
-rw-r--r-- | tools/testing/selftests/mm/thp_settings.h | 80 | ||||
-rw-r--r-- | tools/testing/selftests/mm/thuge-gen.c | 3 | ||||
-rw-r--r-- | tools/testing/selftests/mm/uffd-common.c | 39 | ||||
-rw-r--r-- | tools/testing/selftests/mm/uffd-common.h | 9 | ||||
-rw-r--r-- | tools/testing/selftests/mm/uffd-stress.c | 5 | ||||
-rw-r--r-- | tools/testing/selftests/mm/uffd-unit-tests.c | 209 | ||||
-rw-r--r-- | tools/testing/selftests/mm/vm_util.c | 80 | ||||
-rw-r--r-- | tools/testing/selftests/mm/vm_util.h | 2 |
17 files changed, 1115 insertions, 541 deletions
diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index dede0bcf97..2453add65d 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -117,8 +117,8 @@ TEST_FILES += va_high_addr_switch.sh include ../lib.mk -$(TEST_GEN_PROGS): vm_util.c -$(TEST_GEN_FILES): vm_util.c +$(TEST_GEN_PROGS): vm_util.c thp_settings.c +$(TEST_GEN_FILES): vm_util.c thp_settings.c $(OUTPUT)/uffd-stress: uffd-common.c $(OUTPUT)/uffd-unit-tests: uffd-common.c diff --git a/tools/testing/selftests/mm/compaction_test.c b/tools/testing/selftests/mm/compaction_test.c index 9b420140ba..656afba02d 100644 --- a/tools/testing/selftests/mm/compaction_test.c +++ b/tools/testing/selftests/mm/compaction_test.c @@ -33,7 +33,7 @@ int read_memory_info(unsigned long *memfree, unsigned long *hugepagesize) FILE *cmdfile = popen(cmd, "r"); if (!(fgets(buffer, sizeof(buffer), cmdfile))) { - perror("Failed to read meminfo\n"); + ksft_print_msg("Failed to read meminfo: %s\n", strerror(errno)); return -1; } @@ -44,7 +44,7 @@ int read_memory_info(unsigned long *memfree, unsigned long *hugepagesize) cmdfile = popen(cmd, "r"); if (!(fgets(buffer, sizeof(buffer), cmdfile))) { - perror("Failed to read meminfo\n"); + ksft_print_msg("Failed to read meminfo: %s\n", strerror(errno)); return -1; } @@ -62,14 +62,14 @@ int prereq(void) fd = open("/proc/sys/vm/compact_unevictable_allowed", O_RDONLY | O_NONBLOCK); if (fd < 0) { - perror("Failed to open\n" - "/proc/sys/vm/compact_unevictable_allowed\n"); + ksft_print_msg("Failed to open /proc/sys/vm/compact_unevictable_allowed: %s\n", + strerror(errno)); return -1; } if (read(fd, &allowed, sizeof(char)) != sizeof(char)) { - perror("Failed to read from\n" - "/proc/sys/vm/compact_unevictable_allowed\n"); + ksft_print_msg("Failed to read from /proc/sys/vm/compact_unevictable_allowed: %s\n", + strerror(errno)); close(fd); return -1; } @@ -78,12 +78,13 @@ int prereq(void) if (allowed == '1') return 0; + ksft_print_msg("Compaction isn't allowed\n"); return -1; } int check_compaction(unsigned long mem_free, unsigned int hugepage_size) { - int fd; + int fd, ret = -1; int compaction_index = 0; char initial_nr_hugepages[10] = {0}; char nr_hugepages[10] = {0}; @@ -94,18 +95,21 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size) fd = open("/proc/sys/vm/nr_hugepages", O_RDWR | O_NONBLOCK); if (fd < 0) { - perror("Failed to open /proc/sys/vm/nr_hugepages"); + ksft_test_result_fail("Failed to open /proc/sys/vm/nr_hugepages: %s\n", + strerror(errno)); return -1; } if (read(fd, initial_nr_hugepages, sizeof(initial_nr_hugepages)) <= 0) { - perror("Failed to read from /proc/sys/vm/nr_hugepages"); + ksft_test_result_fail("Failed to read from /proc/sys/vm/nr_hugepages: %s\n", + strerror(errno)); goto close_fd; } /* Start with the initial condition of 0 huge pages*/ if (write(fd, "0", sizeof(char)) != sizeof(char)) { - perror("Failed to write 0 to /proc/sys/vm/nr_hugepages\n"); + ksft_test_result_fail("Failed to write 0 to /proc/sys/vm/nr_hugepages: %s\n", + strerror(errno)); goto close_fd; } @@ -114,14 +118,16 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size) /* Request a large number of huge pages. The Kernel will allocate as much as it can */ if (write(fd, "100000", (6*sizeof(char))) != (6*sizeof(char))) { - perror("Failed to write 100000 to /proc/sys/vm/nr_hugepages\n"); + ksft_test_result_fail("Failed to write 100000 to /proc/sys/vm/nr_hugepages: %s\n", + strerror(errno)); goto close_fd; } lseek(fd, 0, SEEK_SET); if (read(fd, nr_hugepages, sizeof(nr_hugepages)) <= 0) { - perror("Failed to re-read from /proc/sys/vm/nr_hugepages\n"); + ksft_test_result_fail("Failed to re-read from /proc/sys/vm/nr_hugepages: %s\n", + strerror(errno)); goto close_fd; } @@ -129,67 +135,58 @@ int check_compaction(unsigned long mem_free, unsigned int hugepage_size) huge pages */ compaction_index = mem_free/(atoi(nr_hugepages) * hugepage_size); - if (compaction_index > 3) { - printf("No of huge pages allocated = %d\n", - (atoi(nr_hugepages))); - fprintf(stderr, "ERROR: Less that 1/%d of memory is available\n" - "as huge pages\n", compaction_index); - goto close_fd; - } - - printf("No of huge pages allocated = %d\n", - (atoi(nr_hugepages))); - lseek(fd, 0, SEEK_SET); if (write(fd, initial_nr_hugepages, strlen(initial_nr_hugepages)) != strlen(initial_nr_hugepages)) { - perror("Failed to write value to /proc/sys/vm/nr_hugepages\n"); + ksft_test_result_fail("Failed to write value to /proc/sys/vm/nr_hugepages: %s\n", + strerror(errno)); goto close_fd; } - close(fd); - return 0; + if (compaction_index > 3) { + ksft_print_msg("ERROR: Less that 1/%d of memory is available\n" + "as huge pages\n", compaction_index); + ksft_test_result_fail("No of huge pages allocated = %d\n", (atoi(nr_hugepages))); + goto close_fd; + } + + ksft_test_result_pass("Memory compaction succeeded. No of huge pages allocated = %d\n", + (atoi(nr_hugepages))); + ret = 0; close_fd: close(fd); - printf("Not OK. Compaction test failed."); - return -1; + return ret; } int main(int argc, char **argv) { struct rlimit lim; - struct map_list *list, *entry; + struct map_list *list = NULL, *entry; size_t page_size, i; void *map = NULL; unsigned long mem_free = 0; unsigned long hugepage_size = 0; long mem_fragmentable_MB = 0; - if (prereq() != 0) { - printf("Either the sysctl compact_unevictable_allowed is not\n" - "set to 1 or couldn't read the proc file.\n" - "Skipping the test\n"); - return KSFT_SKIP; - } + ksft_print_header(); + + if (prereq() || geteuid()) + return ksft_exit_pass(); + + ksft_set_plan(1); lim.rlim_cur = RLIM_INFINITY; lim.rlim_max = RLIM_INFINITY; - if (setrlimit(RLIMIT_MEMLOCK, &lim)) { - perror("Failed to set rlimit:\n"); - return -1; - } + if (setrlimit(RLIMIT_MEMLOCK, &lim)) + ksft_exit_fail_msg("Failed to set rlimit: %s\n", strerror(errno)); page_size = getpagesize(); - list = NULL; - - if (read_memory_info(&mem_free, &hugepage_size) != 0) { - printf("ERROR: Cannot read meminfo\n"); - return -1; - } + if (read_memory_info(&mem_free, &hugepage_size) != 0) + ksft_exit_fail_msg("Failed to get meminfo\n"); mem_fragmentable_MB = mem_free * 0.8 / 1024; @@ -225,7 +222,7 @@ int main(int argc, char **argv) } if (check_compaction(mem_free, hugepage_size) == 0) - return 0; + return ksft_exit_pass(); - return -1; + return ksft_exit_fail(); } diff --git a/tools/testing/selftests/mm/cow.c b/tools/testing/selftests/mm/cow.c index 6f2f839904..363bf5f801 100644 --- a/tools/testing/selftests/mm/cow.c +++ b/tools/testing/selftests/mm/cow.c @@ -29,15 +29,49 @@ #include "../../../../mm/gup_test.h" #include "../kselftest.h" #include "vm_util.h" +#include "thp_settings.h" static size_t pagesize; static int pagemap_fd; -static size_t thpsize; +static size_t pmdsize; +static int nr_thpsizes; +static size_t thpsizes[20]; static int nr_hugetlbsizes; static size_t hugetlbsizes[10]; static int gup_fd; static bool has_huge_zeropage; +static int sz2ord(size_t size) +{ + return __builtin_ctzll(size / pagesize); +} + +static int detect_thp_sizes(size_t sizes[], int max) +{ + int count = 0; + unsigned long orders; + size_t kb; + int i; + + /* thp not supported at all. */ + if (!pmdsize) + return 0; + + orders = 1UL << sz2ord(pmdsize); + orders |= thp_supported_orders(); + + for (i = 0; orders && count < max; i++) { + if (!(orders & (1UL << i))) + continue; + orders &= ~(1UL << i); + kb = (pagesize >> 10) << i; + sizes[count++] = kb * 1024; + ksft_print_msg("[INFO] detected THP size: %zu KiB\n", kb); + } + + return count; +} + static void detect_huge_zeropage(void) { int fd = open("/sys/kernel/mm/transparent_hugepage/use_zero_page", @@ -734,7 +768,7 @@ enum thp_run { THP_RUN_PARTIAL_SHARED, }; -static void do_run_with_thp(test_fn fn, enum thp_run thp_run) +static void do_run_with_thp(test_fn fn, enum thp_run thp_run, size_t thpsize) { char *mem, *mmap_mem, *tmp, *mremap_mem = MAP_FAILED; size_t size, mmap_size, mremap_size; @@ -759,11 +793,11 @@ static void do_run_with_thp(test_fn fn, enum thp_run thp_run) } /* - * Try to populate a THP. Touch the first sub-page and test if we get - * another sub-page populated automatically. + * Try to populate a THP. Touch the first sub-page and test if + * we get the last sub-page populated automatically. */ mem[0] = 0; - if (!pagemap_is_populated(pagemap_fd, mem + pagesize)) { + if (!pagemap_is_populated(pagemap_fd, mem + thpsize - pagesize)) { ksft_test_result_skip("Did not get a THP populated\n"); goto munmap; } @@ -773,12 +807,14 @@ static void do_run_with_thp(test_fn fn, enum thp_run thp_run) switch (thp_run) { case THP_RUN_PMD: case THP_RUN_PMD_SWAPOUT: + assert(thpsize == pmdsize); break; case THP_RUN_PTE: case THP_RUN_PTE_SWAPOUT: /* * Trigger PTE-mapping the THP by temporarily mapping a single - * subpage R/O. + * subpage R/O. This is a noop if the THP is not pmdsize (and + * therefore already PTE-mapped). */ ret = mprotect(mem + pagesize, pagesize, PROT_READ); if (ret) { @@ -875,52 +911,60 @@ munmap: munmap(mremap_mem, mremap_size); } -static void run_with_thp(test_fn fn, const char *desc) +static void run_with_thp(test_fn fn, const char *desc, size_t size) { - ksft_print_msg("[RUN] %s ... with THP\n", desc); - do_run_with_thp(fn, THP_RUN_PMD); + ksft_print_msg("[RUN] %s ... with THP (%zu kB)\n", + desc, size / 1024); + do_run_with_thp(fn, THP_RUN_PMD, size); } -static void run_with_thp_swap(test_fn fn, const char *desc) +static void run_with_thp_swap(test_fn fn, const char *desc, size_t size) { - ksft_print_msg("[RUN] %s ... with swapped-out THP\n", desc); - do_run_with_thp(fn, THP_RUN_PMD_SWAPOUT); + ksft_print_msg("[RUN] %s ... with swapped-out THP (%zu kB)\n", + desc, size / 1024); + do_run_with_thp(fn, THP_RUN_PMD_SWAPOUT, size); } -static void run_with_pte_mapped_thp(test_fn fn, const char *desc) +static void run_with_pte_mapped_thp(test_fn fn, const char *desc, size_t size) { - ksft_print_msg("[RUN] %s ... with PTE-mapped THP\n", desc); - do_run_with_thp(fn, THP_RUN_PTE); + ksft_print_msg("[RUN] %s ... with PTE-mapped THP (%zu kB)\n", + desc, size / 1024); + do_run_with_thp(fn, THP_RUN_PTE, size); } -static void run_with_pte_mapped_thp_swap(test_fn fn, const char *desc) +static void run_with_pte_mapped_thp_swap(test_fn fn, const char *desc, size_t size) { - ksft_print_msg("[RUN] %s ... with swapped-out, PTE-mapped THP\n", desc); - do_run_with_thp(fn, THP_RUN_PTE_SWAPOUT); + ksft_print_msg("[RUN] %s ... with swapped-out, PTE-mapped THP (%zu kB)\n", + desc, size / 1024); + do_run_with_thp(fn, THP_RUN_PTE_SWAPOUT, size); } -static void run_with_single_pte_of_thp(test_fn fn, const char *desc) +static void run_with_single_pte_of_thp(test_fn fn, const char *desc, size_t size) { - ksft_print_msg("[RUN] %s ... with single PTE of THP\n", desc); - do_run_with_thp(fn, THP_RUN_SINGLE_PTE); + ksft_print_msg("[RUN] %s ... with single PTE of THP (%zu kB)\n", + desc, size / 1024); + do_run_with_thp(fn, THP_RUN_SINGLE_PTE, size); } -static void run_with_single_pte_of_thp_swap(test_fn fn, const char *desc) +static void run_with_single_pte_of_thp_swap(test_fn fn, const char *desc, size_t size) { - ksft_print_msg("[RUN] %s ... with single PTE of swapped-out THP\n", desc); - do_run_with_thp(fn, THP_RUN_SINGLE_PTE_SWAPOUT); + ksft_print_msg("[RUN] %s ... with single PTE of swapped-out THP (%zu kB)\n", + desc, size / 1024); + do_run_with_thp(fn, THP_RUN_SINGLE_PTE_SWAPOUT, size); } -static void run_with_partial_mremap_thp(test_fn fn, const char *desc) +static void run_with_partial_mremap_thp(test_fn fn, const char *desc, size_t size) { - ksft_print_msg("[RUN] %s ... with partially mremap()'ed THP\n", desc); - do_run_with_thp(fn, THP_RUN_PARTIAL_MREMAP); + ksft_print_msg("[RUN] %s ... with partially mremap()'ed THP (%zu kB)\n", + desc, size / 1024); + do_run_with_thp(fn, THP_RUN_PARTIAL_MREMAP, size); } -static void run_with_partial_shared_thp(test_fn fn, const char *desc) +static void run_with_partial_shared_thp(test_fn fn, const char *desc, size_t size) { - ksft_print_msg("[RUN] %s ... with partially shared THP\n", desc); - do_run_with_thp(fn, THP_RUN_PARTIAL_SHARED); + ksft_print_msg("[RUN] %s ... with partially shared THP (%zu kB)\n", + desc, size / 1024); + do_run_with_thp(fn, THP_RUN_PARTIAL_SHARED, size); } static void run_with_hugetlb(test_fn fn, const char *desc, size_t hugetlbsize) @@ -1091,15 +1135,27 @@ static void run_anon_test_case(struct test_case const *test_case) run_with_base_page(test_case->fn, test_case->desc); run_with_base_page_swap(test_case->fn, test_case->desc); - if (thpsize) { - run_with_thp(test_case->fn, test_case->desc); - run_with_thp_swap(test_case->fn, test_case->desc); - run_with_pte_mapped_thp(test_case->fn, test_case->desc); - run_with_pte_mapped_thp_swap(test_case->fn, test_case->desc); - run_with_single_pte_of_thp(test_case->fn, test_case->desc); - run_with_single_pte_of_thp_swap(test_case->fn, test_case->desc); - run_with_partial_mremap_thp(test_case->fn, test_case->desc); - run_with_partial_shared_thp(test_case->fn, test_case->desc); + for (i = 0; i < nr_thpsizes; i++) { + size_t size = thpsizes[i]; + struct thp_settings settings = *thp_current_settings(); + + settings.hugepages[sz2ord(pmdsize)].enabled = THP_NEVER; + settings.hugepages[sz2ord(size)].enabled = THP_ALWAYS; + thp_push_settings(&settings); + + if (size == pmdsize) { + run_with_thp(test_case->fn, test_case->desc, size); + run_with_thp_swap(test_case->fn, test_case->desc, size); + } + + run_with_pte_mapped_thp(test_case->fn, test_case->desc, size); + run_with_pte_mapped_thp_swap(test_case->fn, test_case->desc, size); + run_with_single_pte_of_thp(test_case->fn, test_case->desc, size); + run_with_single_pte_of_thp_swap(test_case->fn, test_case->desc, size); + run_with_partial_mremap_thp(test_case->fn, test_case->desc, size); + run_with_partial_shared_thp(test_case->fn, test_case->desc, size); + + thp_pop_settings(); } for (i = 0; i < nr_hugetlbsizes; i++) run_with_hugetlb(test_case->fn, test_case->desc, @@ -1120,8 +1176,9 @@ static int tests_per_anon_test_case(void) { int tests = 2 + nr_hugetlbsizes; - if (thpsize) - tests += 8; + tests += 6 * nr_thpsizes; + if (pmdsize) + tests += 2; return tests; } @@ -1329,7 +1386,7 @@ static void run_anon_thp_test_cases(void) { int i; - if (!thpsize) + if (!pmdsize) return; ksft_print_msg("[INFO] Anonymous THP tests\n"); @@ -1338,13 +1395,13 @@ static void run_anon_thp_test_cases(void) struct test_case const *test_case = &anon_thp_test_cases[i]; ksft_print_msg("[RUN] %s\n", test_case->desc); - do_run_with_thp(test_case->fn, THP_RUN_PMD); + do_run_with_thp(test_case->fn, THP_RUN_PMD, pmdsize); } } static int tests_per_anon_thp_test_case(void) { - return thpsize ? 1 : 0; + return pmdsize ? 1 : 0; } typedef void (*non_anon_test_fn)(char *mem, const char *smem, size_t size); @@ -1419,7 +1476,7 @@ static void run_with_huge_zeropage(non_anon_test_fn fn, const char *desc) } /* For alignment purposes, we need twice the thp size. */ - mmap_size = 2 * thpsize; + mmap_size = 2 * pmdsize; mmap_mem = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (mmap_mem == MAP_FAILED) { @@ -1434,11 +1491,11 @@ static void run_with_huge_zeropage(non_anon_test_fn fn, const char *desc) } /* We need a THP-aligned memory area. */ - mem = (char *)(((uintptr_t)mmap_mem + thpsize) & ~(thpsize - 1)); - smem = (char *)(((uintptr_t)mmap_smem + thpsize) & ~(thpsize - 1)); + mem = (char *)(((uintptr_t)mmap_mem + pmdsize) & ~(pmdsize - 1)); + smem = (char *)(((uintptr_t)mmap_smem + pmdsize) & ~(pmdsize - 1)); - ret = madvise(mem, thpsize, MADV_HUGEPAGE); - ret |= madvise(smem, thpsize, MADV_HUGEPAGE); + ret = madvise(mem, pmdsize, MADV_HUGEPAGE); + ret |= madvise(smem, pmdsize, MADV_HUGEPAGE); if (ret) { ksft_test_result_fail("MADV_HUGEPAGE failed\n"); goto munmap; @@ -1457,7 +1514,7 @@ static void run_with_huge_zeropage(non_anon_test_fn fn, const char *desc) goto munmap; } - fn(mem, smem, thpsize); + fn(mem, smem, pmdsize); munmap: munmap(mmap_mem, mmap_size); if (mmap_smem != MAP_FAILED) @@ -1650,7 +1707,7 @@ static void run_non_anon_test_case(struct non_anon_test_case const *test_case) run_with_zeropage(test_case->fn, test_case->desc); run_with_memfd(test_case->fn, test_case->desc); run_with_tmpfile(test_case->fn, test_case->desc); - if (thpsize) + if (pmdsize) run_with_huge_zeropage(test_case->fn, test_case->desc); for (i = 0; i < nr_hugetlbsizes; i++) run_with_memfd_hugetlb(test_case->fn, test_case->desc, @@ -1671,7 +1728,7 @@ static int tests_per_non_anon_test_case(void) { int tests = 3 + nr_hugetlbsizes; - if (thpsize) + if (pmdsize) tests += 1; return tests; } @@ -1679,14 +1736,23 @@ static int tests_per_non_anon_test_case(void) int main(int argc, char **argv) { int err; + struct thp_settings default_settings; ksft_print_header(); pagesize = getpagesize(); - thpsize = read_pmd_pagesize(); - if (thpsize) - ksft_print_msg("[INFO] detected THP size: %zu KiB\n", - thpsize / 1024); + pmdsize = read_pmd_pagesize(); + if (pmdsize) { + /* Only if THP is supported. */ + thp_read_settings(&default_settings); + default_settings.hugepages[sz2ord(pmdsize)].enabled = THP_INHERIT; + thp_save_settings(); + thp_push_settings(&default_settings); + + ksft_print_msg("[INFO] detected PMD size: %zu KiB\n", + pmdsize / 1024); + nr_thpsizes = detect_thp_sizes(thpsizes, ARRAY_SIZE(thpsizes)); + } nr_hugetlbsizes = detect_hugetlb_page_sizes(hugetlbsizes, ARRAY_SIZE(hugetlbsizes)); detect_huge_zeropage(); @@ -1704,6 +1770,11 @@ int main(int argc, char **argv) run_anon_thp_test_cases(); run_non_anon_test_cases(); + if (pmdsize) { + /* Only if THP is supported. */ + thp_restore_settings(); + } + err = ksft_get_fail_cnt(); if (err) ksft_exit_fail_msg("%d out of %d tests failed\n", diff --git a/tools/testing/selftests/mm/hugepage-mmap.c b/tools/testing/selftests/mm/hugepage-mmap.c index 955ef87f38..267eea2e0e 100644 --- a/tools/testing/selftests/mm/hugepage-mmap.c +++ b/tools/testing/selftests/mm/hugepage-mmap.c @@ -22,6 +22,7 @@ #include <unistd.h> #include <sys/mman.h> #include <fcntl.h> +#include "../kselftest.h" #define LENGTH (256UL*1024*1024) #define PROTECTION (PROT_READ | PROT_WRITE) @@ -37,7 +38,7 @@ static void check_bytes(char *addr) { - printf("First hex is %x\n", *((unsigned int *)addr)); + ksft_print_msg("First hex is %x\n", *((unsigned int *)addr)); } static void write_bytes(char *addr) @@ -55,7 +56,7 @@ static int read_bytes(char *addr) check_bytes(addr); for (i = 0; i < LENGTH; i++) if (*(addr + i) != (char)i) { - printf("Mismatch at %lu\n", i); + ksft_print_msg("Error: Mismatch at %lu\n", i); return 1; } return 0; @@ -66,20 +67,20 @@ int main(void) void *addr; int fd, ret; + ksft_print_header(); + ksft_set_plan(1); + fd = memfd_create("hugepage-mmap", MFD_HUGETLB); - if (fd < 0) { - perror("memfd_create() failed"); - exit(1); - } + if (fd < 0) + ksft_exit_fail_msg("memfd_create() failed: %s\n", strerror(errno)); addr = mmap(ADDR, LENGTH, PROTECTION, FLAGS, fd, 0); if (addr == MAP_FAILED) { - perror("mmap"); close(fd); - exit(1); + ksft_exit_fail_msg("mmap(): %s\n", strerror(errno)); } - printf("Returned address is %p\n", addr); + ksft_print_msg("Returned address is %p\n", addr); check_bytes(addr); write_bytes(addr); ret = read_bytes(addr); @@ -87,5 +88,7 @@ int main(void) munmap(addr, LENGTH); close(fd); - return ret; + ksft_test_result(!ret, "Read same data\n"); + + ksft_exit(!ret); } diff --git a/tools/testing/selftests/mm/hugepage-mremap.c b/tools/testing/selftests/mm/hugepage-mremap.c index cabd0084f5..c463d1c09c 100644 --- a/tools/testing/selftests/mm/hugepage-mremap.c +++ b/tools/testing/selftests/mm/hugepage-mremap.c @@ -24,6 +24,7 @@ #include <sys/ioctl.h> #include <string.h> #include <stdbool.h> +#include "../kselftest.h" #include "vm_util.h" #define DEFAULT_LENGTH_MB 10UL @@ -34,7 +35,7 @@ static void check_bytes(char *addr) { - printf("First hex is %x\n", *((unsigned int *)addr)); + ksft_print_msg("First hex is %x\n", *((unsigned int *)addr)); } static void write_bytes(char *addr, size_t len) @@ -52,7 +53,7 @@ static int read_bytes(char *addr, size_t len) check_bytes(addr); for (i = 0; i < len; i++) if (*(addr + i) != (char)i) { - printf("Mismatch at %lu\n", i); + ksft_print_msg("Mismatch at %lu\n", i); return 1; } return 0; @@ -66,17 +67,13 @@ static void register_region_with_uffd(char *addr, size_t len) /* Create and enable userfaultfd object. */ uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK); - if (uffd == -1) { - perror("userfaultfd"); - exit(1); - } + if (uffd == -1) + ksft_exit_fail_msg("userfaultfd: %s\n", strerror(errno)); uffdio_api.api = UFFD_API; uffdio_api.features = 0; - if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1) { - perror("ioctl-UFFDIO_API"); - exit(1); - } + if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1) + ksft_exit_fail_msg("ioctl-UFFDIO_API: %s\n", strerror(errno)); /* Create a private anonymous mapping. The memory will be * demand-zero paged--that is, not yet allocated. When we @@ -86,21 +83,17 @@ static void register_region_with_uffd(char *addr, size_t len) addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if (addr == MAP_FAILED) { - perror("mmap"); - exit(1); - } + if (addr == MAP_FAILED) + ksft_exit_fail_msg("mmap: %s\n", strerror(errno)); - printf("Address returned by mmap() = %p\n", addr); + ksft_print_msg("Address returned by mmap() = %p\n", addr); /* Register the memory range of the mapping we just created for * handling by the userfaultfd object. In mode, we request to track * missing pages (i.e., pages that have not yet been faulted in). */ - if (uffd_register(uffd, addr, len, true, false, false)) { - perror("ioctl-UFFDIO_REGISTER"); - exit(1); - } + if (uffd_register(uffd, addr, len, true, false, false)) + ksft_exit_fail_msg("ioctl-UFFDIO_REGISTER: %s\n", strerror(errno)); } int main(int argc, char *argv[]) @@ -108,10 +101,11 @@ int main(int argc, char *argv[]) size_t length = 0; int ret = 0, fd; - if (argc >= 2 && !strcmp(argv[1], "-h")) { - printf("Usage: %s [length_in_MB]\n", argv[0]); - exit(1); - } + ksft_print_header(); + ksft_set_plan(1); + + if (argc >= 2 && !strcmp(argv[1], "-h")) + ksft_exit_fail_msg("Usage: %s [length_in_MB]\n", argv[0]); /* Read memory length as the first arg if valid, otherwise fallback to * the default length. @@ -123,50 +117,40 @@ int main(int argc, char *argv[]) length = MB_TO_BYTES(length); fd = memfd_create(argv[0], MFD_HUGETLB); - if (fd < 0) { - perror("Open failed"); - exit(1); - } + if (fd < 0) + ksft_exit_fail_msg("Open failed: %s\n", strerror(errno)); /* mmap to a PUD aligned address to hopefully trigger pmd sharing. */ unsigned long suggested_addr = 0x7eaa40000000; void *haddr = mmap((void *)suggested_addr, length, PROTECTION, MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0); - printf("Map haddr: Returned address is %p\n", haddr); - if (haddr == MAP_FAILED) { - perror("mmap1"); - exit(1); - } + ksft_print_msg("Map haddr: Returned address is %p\n", haddr); + if (haddr == MAP_FAILED) + ksft_exit_fail_msg("mmap1: %s\n", strerror(errno)); /* mmap again to a dummy address to hopefully trigger pmd sharing. */ suggested_addr = 0x7daa40000000; void *daddr = mmap((void *)suggested_addr, length, PROTECTION, MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0); - printf("Map daddr: Returned address is %p\n", daddr); - if (daddr == MAP_FAILED) { - perror("mmap3"); - exit(1); - } + ksft_print_msg("Map daddr: Returned address is %p\n", daddr); + if (daddr == MAP_FAILED) + ksft_exit_fail_msg("mmap3: %s\n", strerror(errno)); suggested_addr = 0x7faa40000000; void *vaddr = mmap((void *)suggested_addr, length, PROTECTION, FLAGS, -1, 0); - printf("Map vaddr: Returned address is %p\n", vaddr); - if (vaddr == MAP_FAILED) { - perror("mmap2"); - exit(1); - } + ksft_print_msg("Map vaddr: Returned address is %p\n", vaddr); + if (vaddr == MAP_FAILED) + ksft_exit_fail_msg("mmap2: %s\n", strerror(errno)); register_region_with_uffd(haddr, length); void *addr = mremap(haddr, length, length, MREMAP_MAYMOVE | MREMAP_FIXED, vaddr); - if (addr == MAP_FAILED) { - perror("mremap"); - exit(1); - } + if (addr == MAP_FAILED) + ksft_exit_fail_msg("mremap: %s\n", strerror(errno)); - printf("Mremap: Returned address is %p\n", addr); + ksft_print_msg("Mremap: Returned address is %p\n", addr); check_bytes(addr); write_bytes(addr, length); ret = read_bytes(addr, length); @@ -174,12 +158,11 @@ int main(int argc, char *argv[]) munmap(addr, length); addr = mremap(addr, length, length, 0); - if (addr != MAP_FAILED) { - printf("mremap: Expected failure, but call succeeded\n"); - exit(1); - } + if (addr != MAP_FAILED) + ksft_exit_fail_msg("mremap: Expected failure, but call succeeded\n"); close(fd); - return ret; + ksft_test_result(!ret, "Read same data\n"); + ksft_exit(!ret); } diff --git a/tools/testing/selftests/mm/khugepaged.c b/tools/testing/selftests/mm/khugepaged.c index 030667cb55..829320a519 100644 --- a/tools/testing/selftests/mm/khugepaged.c +++ b/tools/testing/selftests/mm/khugepaged.c @@ -22,13 +22,14 @@ #include "linux/magic.h" #include "vm_util.h" +#include "thp_settings.h" #define BASE_ADDR ((void *)(1UL << 30)) static unsigned long hpage_pmd_size; static unsigned long page_size; static int hpage_pmd_nr; +static int anon_order; -#define THP_SYSFS "/sys/kernel/mm/transparent_hugepage/" #define PID_SMAPS "/proc/self/smaps" #define TEST_FILE "collapse_test_file" @@ -71,78 +72,7 @@ struct file_info { }; static struct file_info finfo; - -enum thp_enabled { - THP_ALWAYS, - THP_MADVISE, - THP_NEVER, -}; - -static const char *thp_enabled_strings[] = { - "always", - "madvise", - "never", - NULL -}; - -enum thp_defrag { - THP_DEFRAG_ALWAYS, - THP_DEFRAG_DEFER, - THP_DEFRAG_DEFER_MADVISE, - THP_DEFRAG_MADVISE, - THP_DEFRAG_NEVER, -}; - -static const char *thp_defrag_strings[] = { - "always", - "defer", - "defer+madvise", - "madvise", - "never", - NULL -}; - -enum shmem_enabled { - SHMEM_ALWAYS, - SHMEM_WITHIN_SIZE, - SHMEM_ADVISE, - SHMEM_NEVER, - SHMEM_DENY, - SHMEM_FORCE, -}; - -static const char *shmem_enabled_strings[] = { - "always", - "within_size", - "advise", - "never", - "deny", - "force", - NULL -}; - -struct khugepaged_settings { - bool defrag; - unsigned int alloc_sleep_millisecs; - unsigned int scan_sleep_millisecs; - unsigned int max_ptes_none; - unsigned int max_ptes_swap; - unsigned int max_ptes_shared; - unsigned long pages_to_scan; -}; - -struct settings { - enum thp_enabled thp_enabled; - enum thp_defrag thp_defrag; - enum shmem_enabled shmem_enabled; - bool use_zero_page; - struct khugepaged_settings khugepaged; - unsigned long read_ahead_kb; -}; - -static struct settings saved_settings; static bool skip_settings_restore; - static int exit_status; static void success(const char *msg) @@ -161,260 +91,34 @@ static void skip(const char *msg) printf(" \e[33m%s\e[0m\n", msg); } -static int read_file(const char *path, char *buf, size_t buflen) -{ - int fd; - ssize_t numread; - - fd = open(path, O_RDONLY); - if (fd == -1) - return 0; - - numread = read(fd, buf, buflen - 1); - if (numread < 1) { - close(fd); - return 0; - } - - buf[numread] = '\0'; - close(fd); - - return (unsigned int) numread; -} - -static int write_file(const char *path, const char *buf, size_t buflen) -{ - int fd; - ssize_t numwritten; - - fd = open(path, O_WRONLY); - if (fd == -1) { - printf("open(%s)\n", path); - exit(EXIT_FAILURE); - return 0; - } - - numwritten = write(fd, buf, buflen - 1); - close(fd); - if (numwritten < 1) { - printf("write(%s)\n", buf); - exit(EXIT_FAILURE); - return 0; - } - - return (unsigned int) numwritten; -} - -static int read_string(const char *name, const char *strings[]) +static void restore_settings_atexit(void) { - char path[PATH_MAX]; - char buf[256]; - char *c; - int ret; - - ret = snprintf(path, PATH_MAX, THP_SYSFS "%s", name); - if (ret >= PATH_MAX) { - printf("%s: Pathname is too long\n", __func__); - exit(EXIT_FAILURE); - } - - if (!read_file(path, buf, sizeof(buf))) { - perror(path); - exit(EXIT_FAILURE); - } - - c = strchr(buf, '['); - if (!c) { - printf("%s: Parse failure\n", __func__); - exit(EXIT_FAILURE); - } - - c++; - memmove(buf, c, sizeof(buf) - (c - buf)); - - c = strchr(buf, ']'); - if (!c) { - printf("%s: Parse failure\n", __func__); - exit(EXIT_FAILURE); - } - *c = '\0'; - - ret = 0; - while (strings[ret]) { - if (!strcmp(strings[ret], buf)) - return ret; - ret++; - } - - printf("Failed to parse %s\n", name); - exit(EXIT_FAILURE); -} - -static void write_string(const char *name, const char *val) -{ - char path[PATH_MAX]; - int ret; - - ret = snprintf(path, PATH_MAX, THP_SYSFS "%s", name); - if (ret >= PATH_MAX) { - printf("%s: Pathname is too long\n", __func__); - exit(EXIT_FAILURE); - } - - if (!write_file(path, val, strlen(val) + 1)) { - perror(path); - exit(EXIT_FAILURE); - } -} - -static const unsigned long _read_num(const char *path) -{ - char buf[21]; - - if (read_file(path, buf, sizeof(buf)) < 0) { - perror("read_file(read_num)"); - exit(EXIT_FAILURE); - } - - return strtoul(buf, NULL, 10); -} - -static const unsigned long read_num(const char *name) -{ - char path[PATH_MAX]; - int ret; - - ret = snprintf(path, PATH_MAX, THP_SYSFS "%s", name); - if (ret >= PATH_MAX) { - printf("%s: Pathname is too long\n", __func__); - exit(EXIT_FAILURE); - } - return _read_num(path); -} - -static void _write_num(const char *path, unsigned long num) -{ - char buf[21]; - - sprintf(buf, "%ld", num); - if (!write_file(path, buf, strlen(buf) + 1)) { - perror(path); - exit(EXIT_FAILURE); - } -} - -static void write_num(const char *name, unsigned long num) -{ - char path[PATH_MAX]; - int ret; - - ret = snprintf(path, PATH_MAX, THP_SYSFS "%s", name); - if (ret >= PATH_MAX) { - printf("%s: Pathname is too long\n", __func__); - exit(EXIT_FAILURE); - } - _write_num(path, num); -} - -static void write_settings(struct settings *settings) -{ - struct khugepaged_settings *khugepaged = &settings->khugepaged; - - write_string("enabled", thp_enabled_strings[settings->thp_enabled]); - write_string("defrag", thp_defrag_strings[settings->thp_defrag]); - write_string("shmem_enabled", - shmem_enabled_strings[settings->shmem_enabled]); - write_num("use_zero_page", settings->use_zero_page); - - write_num("khugepaged/defrag", khugepaged->defrag); - write_num("khugepaged/alloc_sleep_millisecs", - khugepaged->alloc_sleep_millisecs); - write_num("khugepaged/scan_sleep_millisecs", - khugepaged->scan_sleep_millisecs); - write_num("khugepaged/max_ptes_none", khugepaged->max_ptes_none); - write_num("khugepaged/max_ptes_swap", khugepaged->max_ptes_swap); - write_num("khugepaged/max_ptes_shared", khugepaged->max_ptes_shared); - write_num("khugepaged/pages_to_scan", khugepaged->pages_to_scan); - - if (file_ops && finfo.type == VMA_FILE) - _write_num(finfo.dev_queue_read_ahead_path, - settings->read_ahead_kb); -} - -#define MAX_SETTINGS_DEPTH 4 -static struct settings settings_stack[MAX_SETTINGS_DEPTH]; -static int settings_index; - -static struct settings *current_settings(void) -{ - if (!settings_index) { - printf("Fail: No settings set"); - exit(EXIT_FAILURE); - } - return settings_stack + settings_index - 1; -} + if (skip_settings_restore) + return; -static void push_settings(struct settings *settings) -{ - if (settings_index >= MAX_SETTINGS_DEPTH) { - printf("Fail: Settings stack exceeded"); - exit(EXIT_FAILURE); - } - settings_stack[settings_index++] = *settings; - write_settings(current_settings()); -} + printf("Restore THP and khugepaged settings..."); + thp_restore_settings(); + success("OK"); -static void pop_settings(void) -{ - if (settings_index <= 0) { - printf("Fail: Settings stack empty"); - exit(EXIT_FAILURE); - } - --settings_index; - write_settings(current_settings()); + skip_settings_restore = true; } static void restore_settings(int sig) { - if (skip_settings_restore) - goto out; - - printf("Restore THP and khugepaged settings..."); - write_settings(&saved_settings); - success("OK"); - if (sig) - exit(EXIT_FAILURE); -out: - exit(exit_status); + /* exit() will invoke the restore_settings_atexit handler. */ + exit(sig ? EXIT_FAILURE : exit_status); } static void save_settings(void) { printf("Save THP and khugepaged settings..."); - saved_settings = (struct settings) { - .thp_enabled = read_string("enabled", thp_enabled_strings), - .thp_defrag = read_string("defrag", thp_defrag_strings), - .shmem_enabled = - read_string("shmem_enabled", shmem_enabled_strings), - .use_zero_page = read_num("use_zero_page"), - }; - saved_settings.khugepaged = (struct khugepaged_settings) { - .defrag = read_num("khugepaged/defrag"), - .alloc_sleep_millisecs = - read_num("khugepaged/alloc_sleep_millisecs"), - .scan_sleep_millisecs = - read_num("khugepaged/scan_sleep_millisecs"), - .max_ptes_none = read_num("khugepaged/max_ptes_none"), - .max_ptes_swap = read_num("khugepaged/max_ptes_swap"), - .max_ptes_shared = read_num("khugepaged/max_ptes_shared"), - .pages_to_scan = read_num("khugepaged/pages_to_scan"), - }; if (file_ops && finfo.type == VMA_FILE) - saved_settings.read_ahead_kb = - _read_num(finfo.dev_queue_read_ahead_path); + thp_set_read_ahead_path(finfo.dev_queue_read_ahead_path); + thp_save_settings(); success("OK"); + atexit(restore_settings_atexit); signal(SIGTERM, restore_settings); signal(SIGINT, restore_settings); signal(SIGHUP, restore_settings); @@ -793,7 +497,7 @@ static void __madvise_collapse(const char *msg, char *p, int nr_hpages, struct mem_ops *ops, bool expect) { int ret; - struct settings settings = *current_settings(); + struct thp_settings settings = *thp_current_settings(); printf("%s...", msg); @@ -803,7 +507,7 @@ static void __madvise_collapse(const char *msg, char *p, int nr_hpages, */ settings.thp_enabled = THP_NEVER; settings.shmem_enabled = SHMEM_NEVER; - push_settings(&settings); + thp_push_settings(&settings); /* Clear VM_NOHUGEPAGE */ madvise(p, nr_hpages * hpage_pmd_size, MADV_HUGEPAGE); @@ -815,7 +519,7 @@ static void __madvise_collapse(const char *msg, char *p, int nr_hpages, else success("OK"); - pop_settings(); + thp_pop_settings(); } static void madvise_collapse(const char *msg, char *p, int nr_hpages, @@ -845,13 +549,13 @@ static bool wait_for_scan(const char *msg, char *p, int nr_hpages, madvise(p, nr_hpages * hpage_pmd_size, MADV_HUGEPAGE); /* Wait until the second full_scan completed */ - full_scans = read_num("khugepaged/full_scans") + 2; + full_scans = thp_read_num("khugepaged/full_scans") + 2; printf("%s...", msg); while (timeout--) { if (ops->check_huge(p, nr_hpages)) break; - if (read_num("khugepaged/full_scans") >= full_scans) + if (thp_read_num("khugepaged/full_scans") >= full_scans) break; printf("."); usleep(TICK); @@ -904,13 +608,18 @@ static bool is_tmpfs(struct mem_ops *ops) return ops == &__file_ops && finfo.type == VMA_SHMEM; } +static bool is_anon(struct mem_ops *ops) +{ + return ops == &__anon_ops; +} + static void alloc_at_fault(void) { - struct settings settings = *current_settings(); + struct thp_settings settings = *thp_current_settings(); char *p; settings.thp_enabled = THP_ALWAYS; - push_settings(&settings); + thp_push_settings(&settings); p = alloc_mapping(1); *p = 1; @@ -920,7 +629,7 @@ static void alloc_at_fault(void) else fail("Fail"); - pop_settings(); + thp_pop_settings(); madvise(p, page_size, MADV_DONTNEED); printf("Split huge PMD on MADV_DONTNEED..."); @@ -968,11 +677,12 @@ static void collapse_single_pte_entry(struct collapse_context *c, struct mem_ops static void collapse_max_ptes_none(struct collapse_context *c, struct mem_ops *ops) { int max_ptes_none = hpage_pmd_nr / 2; - struct settings settings = *current_settings(); + struct thp_settings settings = *thp_current_settings(); void *p; + int fault_nr_pages = is_anon(ops) ? 1 << anon_order : 1; settings.khugepaged.max_ptes_none = max_ptes_none; - push_settings(&settings); + thp_push_settings(&settings); p = ops->setup_area(1); @@ -983,10 +693,10 @@ static void collapse_max_ptes_none(struct collapse_context *c, struct mem_ops *o goto skip; } - ops->fault(p, 0, (hpage_pmd_nr - max_ptes_none - 1) * page_size); + ops->fault(p, 0, (hpage_pmd_nr - max_ptes_none - fault_nr_pages) * page_size); c->collapse("Maybe collapse with max_ptes_none exceeded", p, 1, ops, !c->enforce_pte_scan_limits); - validate_memory(p, 0, (hpage_pmd_nr - max_ptes_none - 1) * page_size); + validate_memory(p, 0, (hpage_pmd_nr - max_ptes_none - fault_nr_pages) * page_size); if (c->enforce_pte_scan_limits) { ops->fault(p, 0, (hpage_pmd_nr - max_ptes_none) * page_size); @@ -997,7 +707,7 @@ static void collapse_max_ptes_none(struct collapse_context *c, struct mem_ops *o } skip: ops->cleanup_area(p, hpage_pmd_size); - pop_settings(); + thp_pop_settings(); } static void collapse_swapin_single_pte(struct collapse_context *c, struct mem_ops *ops) @@ -1028,7 +738,7 @@ out: static void collapse_max_ptes_swap(struct collapse_context *c, struct mem_ops *ops) { - int max_ptes_swap = read_num("khugepaged/max_ptes_swap"); + int max_ptes_swap = thp_read_num("khugepaged/max_ptes_swap"); void *p; p = ops->setup_area(1); @@ -1245,11 +955,11 @@ static void collapse_fork_compound(struct collapse_context *c, struct mem_ops *o fail("Fail"); ops->fault(p, 0, page_size); - write_num("khugepaged/max_ptes_shared", hpage_pmd_nr - 1); + thp_write_num("khugepaged/max_ptes_shared", hpage_pmd_nr - 1); c->collapse("Collapse PTE table full of compound pages in child", p, 1, ops, true); - write_num("khugepaged/max_ptes_shared", - current_settings()->khugepaged.max_ptes_shared); + thp_write_num("khugepaged/max_ptes_shared", + thp_current_settings()->khugepaged.max_ptes_shared); validate_memory(p, 0, hpage_pmd_size); ops->cleanup_area(p, hpage_pmd_size); @@ -1270,7 +980,7 @@ static void collapse_fork_compound(struct collapse_context *c, struct mem_ops *o static void collapse_max_ptes_shared(struct collapse_context *c, struct mem_ops *ops) { - int max_ptes_shared = read_num("khugepaged/max_ptes_shared"); + int max_ptes_shared = thp_read_num("khugepaged/max_ptes_shared"); int wstatus; void *p; @@ -1373,7 +1083,7 @@ static void madvise_retracted_page_tables(struct collapse_context *c, static void usage(void) { - fprintf(stderr, "\nUsage: ./khugepaged <test type> [dir]\n\n"); + fprintf(stderr, "\nUsage: ./khugepaged [OPTIONS] <test type> [dir]\n\n"); fprintf(stderr, "\t<test type>\t: <context>:<mem_type>\n"); fprintf(stderr, "\t<context>\t: [all|khugepaged|madvise]\n"); fprintf(stderr, "\t<mem_type>\t: [all|anon|file|shmem]\n"); @@ -1382,15 +1092,34 @@ static void usage(void) fprintf(stderr, "\tCONFIG_READ_ONLY_THP_FOR_FS=y\n"); fprintf(stderr, "\n\tif [dir] is a (sub)directory of a tmpfs mount, tmpfs must be\n"); fprintf(stderr, "\tmounted with huge=madvise option for khugepaged tests to work\n"); + fprintf(stderr, "\n\tSupported Options:\n"); + fprintf(stderr, "\t\t-h: This help message.\n"); + fprintf(stderr, "\t\t-s: mTHP size, expressed as page order.\n"); + fprintf(stderr, "\t\t Defaults to 0. Use this size for anon allocations.\n"); exit(1); } -static void parse_test_type(int argc, const char **argv) +static void parse_test_type(int argc, char **argv) { + int opt; char *buf; const char *token; - if (argc == 1) { + while ((opt = getopt(argc, argv, "s:h")) != -1) { + switch (opt) { + case 's': + anon_order = atoi(optarg); + break; + case 'h': + default: + usage(); + } + } + + argv += optind; + argc -= optind; + + if (argc == 0) { /* Backwards compatibility */ khugepaged_context = &__khugepaged_context; madvise_context = &__madvise_context; @@ -1398,7 +1127,7 @@ static void parse_test_type(int argc, const char **argv) return; } - buf = strdup(argv[1]); + buf = strdup(argv[0]); token = strsep(&buf, ":"); if (!strcmp(token, "all")) { @@ -1432,13 +1161,16 @@ static void parse_test_type(int argc, const char **argv) if (!file_ops) return; - if (argc != 3) + if (argc != 2) usage(); + + get_finfo(argv[1]); } -int main(int argc, const char **argv) +int main(int argc, char **argv) { - struct settings default_settings = { + int hpage_pmd_order; + struct thp_settings default_settings = { .thp_enabled = THP_MADVISE, .thp_defrag = THP_DEFRAG_ALWAYS, .shmem_enabled = SHMEM_ADVISE, @@ -1460,9 +1192,6 @@ int main(int argc, const char **argv) parse_test_type(argc, argv); - if (file_ops) - get_finfo(argv[2]); - setbuf(stdout, NULL); page_size = getpagesize(); @@ -1472,14 +1201,17 @@ int main(int argc, const char **argv) exit(EXIT_FAILURE); } hpage_pmd_nr = hpage_pmd_size / page_size; + hpage_pmd_order = __builtin_ctz(hpage_pmd_nr); default_settings.khugepaged.max_ptes_none = hpage_pmd_nr - 1; default_settings.khugepaged.max_ptes_swap = hpage_pmd_nr / 8; default_settings.khugepaged.max_ptes_shared = hpage_pmd_nr / 2; default_settings.khugepaged.pages_to_scan = hpage_pmd_nr * 8; + default_settings.hugepages[hpage_pmd_order].enabled = THP_INHERIT; + default_settings.hugepages[anon_order].enabled = THP_ALWAYS; save_settings(); - push_settings(&default_settings); + thp_push_settings(&default_settings); alloc_at_fault(); diff --git a/tools/testing/selftests/mm/mremap_test.c b/tools/testing/selftests/mm/mremap_test.c index 1d4c1589c3..2f8b991f78 100644 --- a/tools/testing/selftests/mm/mremap_test.c +++ b/tools/testing/selftests/mm/mremap_test.c @@ -360,7 +360,8 @@ static long long remap_region(struct config c, unsigned int threshold_mb, char pattern_seed) { void *addr, *src_addr, *dest_addr, *dest_preamble_addr; - unsigned long long i; + int d; + unsigned long long t; struct timespec t_start = {0, 0}, t_end = {0, 0}; long long start_ns, end_ns, align_mask, ret, offset; unsigned long long threshold; @@ -378,8 +379,8 @@ static long long remap_region(struct config c, unsigned int threshold_mb, /* Set byte pattern for source block. */ srand(pattern_seed); - for (i = 0; i < threshold; i++) - memset((char *) src_addr + i, (char) rand(), 1); + for (t = 0; t < threshold; t++) + memset((char *) src_addr + t, (char) rand(), 1); /* Mask to zero out lower bits of address for alignment */ align_mask = ~(c.dest_alignment - 1); @@ -420,8 +421,8 @@ static long long remap_region(struct config c, unsigned int threshold_mb, /* Set byte pattern for the dest preamble block. */ srand(pattern_seed); - for (i = 0; i < c.dest_preamble_size; i++) - memset((char *) dest_preamble_addr + i, (char) rand(), 1); + for (d = 0; d < c.dest_preamble_size; d++) + memset((char *) dest_preamble_addr + d, (char) rand(), 1); } clock_gettime(CLOCK_MONOTONIC, &t_start); @@ -437,14 +438,14 @@ static long long remap_region(struct config c, unsigned int threshold_mb, /* Verify byte pattern after remapping */ srand(pattern_seed); - for (i = 0; i < threshold; i++) { + for (t = 0; t < threshold; t++) { char c = (char) rand(); - if (((char *) dest_addr)[i] != c) { + if (((char *) dest_addr)[t] != c) { ksft_print_msg("Data after remap doesn't match at offset %llu\n", - i); + t); ksft_print_msg("Expected: %#x\t Got: %#x\n", c & 0xff, - ((char *) dest_addr)[i] & 0xff); + ((char *) dest_addr)[t] & 0xff); ret = -1; goto clean_up_dest; } @@ -453,14 +454,14 @@ static long long remap_region(struct config c, unsigned int threshold_mb, /* Verify the dest preamble byte pattern after remapping */ if (c.dest_preamble_size) { srand(pattern_seed); - for (i = 0; i < c.dest_preamble_size; i++) { + for (d = 0; d < c.dest_preamble_size; d++) { char c = (char) rand(); - if (((char *) dest_preamble_addr)[i] != c) { + if (((char *) dest_preamble_addr)[d] != c) { ksft_print_msg("Preamble data after remap doesn't match at offset %d\n", - i); + d); ksft_print_msg("Expected: %#x\t Got: %#x\n", c & 0xff, - ((char *) dest_preamble_addr)[i] & 0xff); + ((char *) dest_preamble_addr)[d] & 0xff); ret = -1; goto clean_up_dest; } diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 0075744527..246d53a5d7 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -5,6 +5,7 @@ # Kselftest framework requirement - SKIP code is 4. ksft_skip=4 +count_total=0 count_pass=0 count_fail=0 count_skip=0 @@ -17,6 +18,7 @@ usage: ${BASH_SOURCE[0]:-$0} [ options ] -a: run all tests, including extra ones -t: specify specific categories to tests to run -h: display this message + -n: disable TAP output The default behavior is to run required tests only. If -a is specified, will run all tests. @@ -77,12 +79,14 @@ EOF } RUN_ALL=false +TAP_PREFIX="# " -while getopts "aht:" OPT; do +while getopts "aht:n" OPT; do case ${OPT} in "a") RUN_ALL=true ;; "h") usage ;; "t") VM_SELFTEST_ITEMS=${OPTARG} ;; + "n") TAP_PREFIX= ;; esac done shift $((OPTIND -1)) @@ -184,30 +188,52 @@ fi VADDR64=0 echo "$ARCH64STR" | grep "$ARCH" &>/dev/null && VADDR64=1 +tap_prefix() { + sed -e "s/^/${TAP_PREFIX}/" +} + +tap_output() { + if [[ ! -z "$TAP_PREFIX" ]]; then + read str + echo $str + fi +} + +pretty_name() { + echo "$*" | sed -e 's/^\(bash \)\?\.\///' +} + # Usage: run_test [test binary] [arbitrary test arguments...] run_test() { if test_selected ${CATEGORY}; then + local test=$(pretty_name "$*") local title="running $*" local sep=$(echo -n "$title" | tr "[:graph:][:space:]" -) - printf "%s\n%s\n%s\n" "$sep" "$title" "$sep" + printf "%s\n%s\n%s\n" "$sep" "$title" "$sep" | tap_prefix - "$@" - local ret=$? + ("$@" 2>&1) | tap_prefix + local ret=${PIPESTATUS[0]} + count_total=$(( count_total + 1 )) if [ $ret -eq 0 ]; then count_pass=$(( count_pass + 1 )) - echo "[PASS]" + echo "[PASS]" | tap_prefix + echo "ok ${count_total} ${test}" | tap_output elif [ $ret -eq $ksft_skip ]; then count_skip=$(( count_skip + 1 )) - echo "[SKIP]" + echo "[SKIP]" | tap_prefix + echo "ok ${count_total} ${test} # SKIP" | tap_output exitcode=$ksft_skip else count_fail=$(( count_fail + 1 )) - echo "[FAIL]" + echo "[FAIL]" | tap_prefix + echo "not ok ${count_total} ${test} # exit=$ret" | tap_output exitcode=1 fi fi # test_selected } +echo "TAP version 13" | tap_output + CATEGORY="hugetlb" run_test ./hugepage-mmap shmmax=$(cat /proc/sys/kernel/shmmax) @@ -231,9 +257,9 @@ CATEGORY="hugetlb" run_test ./hugetlb_fault_after_madv echo "$nr_hugepages_tmp" > /proc/sys/vm/nr_hugepages if test_selected "hugetlb"; then - echo "NOTE: These hugetlb tests provide minimal coverage. Use" - echo " https://github.com/libhugetlbfs/libhugetlbfs.git for" - echo " hugetlb regression testing." + echo "NOTE: These hugetlb tests provide minimal coverage. Use" | tap_prefix + echo " https://github.com/libhugetlbfs/libhugetlbfs.git for" | tap_prefix + echo " hugetlb regression testing." | tap_prefix fi CATEGORY="mmap" run_test ./map_fixed_noreplace @@ -312,7 +338,7 @@ CATEGORY="hmm" run_test bash ./test_hmm.sh smoke # MADV_POPULATE_READ and MADV_POPULATE_WRITE tests CATEGORY="madv_populate" run_test ./madv_populate -echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope +(echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope 2>&1) | tap_prefix CATEGORY="memfd_secret" run_test ./memfd_secret # KSM KSM_MERGE_TIME_HUGE_PAGES test with size of 100 @@ -334,8 +360,6 @@ CATEGORY="ksm_numa" run_test ./ksm_tests -N -m 0 CATEGORY="ksm" run_test ./ksm_functional_tests -run_test ./ksm_functional_tests - # protection_keys tests if [ -x ./protection_keys_32 ] then @@ -359,6 +383,8 @@ CATEGORY="cow" run_test ./cow CATEGORY="thp" run_test ./khugepaged +CATEGORY="thp" run_test ./khugepaged -s 2 + CATEGORY="thp" run_test ./transhuge-stress -d 20 CATEGORY="thp" run_test ./split_huge_page_test @@ -369,6 +395,7 @@ CATEGORY="mkdirty" run_test ./mkdirty CATEGORY="mdwe" run_test ./mdwe_test -echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" +echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix +echo "1..${count_total}" | tap_output exit $exitcode diff --git a/tools/testing/selftests/mm/thp_settings.c b/tools/testing/selftests/mm/thp_settings.c new file mode 100644 index 0000000000..a416343810 --- /dev/null +++ b/tools/testing/selftests/mm/thp_settings.c @@ -0,0 +1,349 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <fcntl.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "thp_settings.h" + +#define THP_SYSFS "/sys/kernel/mm/transparent_hugepage/" +#define MAX_SETTINGS_DEPTH 4 +static struct thp_settings settings_stack[MAX_SETTINGS_DEPTH]; +static int settings_index; +static struct thp_settings saved_settings; +static char dev_queue_read_ahead_path[PATH_MAX]; + +static const char * const thp_enabled_strings[] = { + "never", + "always", + "inherit", + "madvise", + NULL +}; + +static const char * const thp_defrag_strings[] = { + "always", + "defer", + "defer+madvise", + "madvise", + "never", + NULL +}; + +static const char * const shmem_enabled_strings[] = { + "always", + "within_size", + "advise", + "never", + "deny", + "force", + NULL +}; + +int read_file(const char *path, char *buf, size_t buflen) +{ + int fd; + ssize_t numread; + + fd = open(path, O_RDONLY); + if (fd == -1) + return 0; + + numread = read(fd, buf, buflen - 1); + if (numread < 1) { + close(fd); + return 0; + } + + buf[numread] = '\0'; + close(fd); + + return (unsigned int) numread; +} + +int write_file(const char *path, const char *buf, size_t buflen) +{ + int fd; + ssize_t numwritten; + + fd = open(path, O_WRONLY); + if (fd == -1) { + printf("open(%s)\n", path); + exit(EXIT_FAILURE); + return 0; + } + + numwritten = write(fd, buf, buflen - 1); + close(fd); + if (numwritten < 1) { + printf("write(%s)\n", buf); + exit(EXIT_FAILURE); + return 0; + } + + return (unsigned int) numwritten; +} + +const unsigned long read_num(const char *path) +{ + char buf[21]; + + if (read_file(path, buf, sizeof(buf)) < 0) { + perror("read_file()"); + exit(EXIT_FAILURE); + } + + return strtoul(buf, NULL, 10); +} + +void write_num(const char *path, unsigned long num) +{ + char buf[21]; + + sprintf(buf, "%ld", num); + if (!write_file(path, buf, strlen(buf) + 1)) { + perror(path); + exit(EXIT_FAILURE); + } +} + +int thp_read_string(const char *name, const char * const strings[]) +{ + char path[PATH_MAX]; + char buf[256]; + char *c; + int ret; + + ret = snprintf(path, PATH_MAX, THP_SYSFS "%s", name); + if (ret >= PATH_MAX) { + printf("%s: Pathname is too long\n", __func__); + exit(EXIT_FAILURE); + } + + if (!read_file(path, buf, sizeof(buf))) { + perror(path); + exit(EXIT_FAILURE); + } + + c = strchr(buf, '['); + if (!c) { + printf("%s: Parse failure\n", __func__); + exit(EXIT_FAILURE); + } + + c++; + memmove(buf, c, sizeof(buf) - (c - buf)); + + c = strchr(buf, ']'); + if (!c) { + printf("%s: Parse failure\n", __func__); + exit(EXIT_FAILURE); + } + *c = '\0'; + + ret = 0; + while (strings[ret]) { + if (!strcmp(strings[ret], buf)) + return ret; + ret++; + } + + printf("Failed to parse %s\n", name); + exit(EXIT_FAILURE); +} + +void thp_write_string(const char *name, const char *val) +{ + char path[PATH_MAX]; + int ret; + + ret = snprintf(path, PATH_MAX, THP_SYSFS "%s", name); + if (ret >= PATH_MAX) { + printf("%s: Pathname is too long\n", __func__); + exit(EXIT_FAILURE); + } + + if (!write_file(path, val, strlen(val) + 1)) { + perror(path); + exit(EXIT_FAILURE); + } +} + +const unsigned long thp_read_num(const char *name) +{ + char path[PATH_MAX]; + int ret; + + ret = snprintf(path, PATH_MAX, THP_SYSFS "%s", name); + if (ret >= PATH_MAX) { + printf("%s: Pathname is too long\n", __func__); + exit(EXIT_FAILURE); + } + return read_num(path); +} + +void thp_write_num(const char *name, unsigned long num) +{ + char path[PATH_MAX]; + int ret; + + ret = snprintf(path, PATH_MAX, THP_SYSFS "%s", name); + if (ret >= PATH_MAX) { + printf("%s: Pathname is too long\n", __func__); + exit(EXIT_FAILURE); + } + write_num(path, num); +} + +void thp_read_settings(struct thp_settings *settings) +{ + unsigned long orders = thp_supported_orders(); + char path[PATH_MAX]; + int i; + + *settings = (struct thp_settings) { + .thp_enabled = thp_read_string("enabled", thp_enabled_strings), + .thp_defrag = thp_read_string("defrag", thp_defrag_strings), + .shmem_enabled = + thp_read_string("shmem_enabled", shmem_enabled_strings), + .use_zero_page = thp_read_num("use_zero_page"), + }; + settings->khugepaged = (struct khugepaged_settings) { + .defrag = thp_read_num("khugepaged/defrag"), + .alloc_sleep_millisecs = + thp_read_num("khugepaged/alloc_sleep_millisecs"), + .scan_sleep_millisecs = + thp_read_num("khugepaged/scan_sleep_millisecs"), + .max_ptes_none = thp_read_num("khugepaged/max_ptes_none"), + .max_ptes_swap = thp_read_num("khugepaged/max_ptes_swap"), + .max_ptes_shared = thp_read_num("khugepaged/max_ptes_shared"), + .pages_to_scan = thp_read_num("khugepaged/pages_to_scan"), + }; + if (dev_queue_read_ahead_path[0]) + settings->read_ahead_kb = read_num(dev_queue_read_ahead_path); + + for (i = 0; i < NR_ORDERS; i++) { + if (!((1 << i) & orders)) { + settings->hugepages[i].enabled = THP_NEVER; + continue; + } + snprintf(path, PATH_MAX, "hugepages-%ukB/enabled", + (getpagesize() >> 10) << i); + settings->hugepages[i].enabled = + thp_read_string(path, thp_enabled_strings); + } +} + +void thp_write_settings(struct thp_settings *settings) +{ + struct khugepaged_settings *khugepaged = &settings->khugepaged; + unsigned long orders = thp_supported_orders(); + char path[PATH_MAX]; + int enabled; + int i; + + thp_write_string("enabled", thp_enabled_strings[settings->thp_enabled]); + thp_write_string("defrag", thp_defrag_strings[settings->thp_defrag]); + thp_write_string("shmem_enabled", + shmem_enabled_strings[settings->shmem_enabled]); + thp_write_num("use_zero_page", settings->use_zero_page); + + thp_write_num("khugepaged/defrag", khugepaged->defrag); + thp_write_num("khugepaged/alloc_sleep_millisecs", + khugepaged->alloc_sleep_millisecs); + thp_write_num("khugepaged/scan_sleep_millisecs", + khugepaged->scan_sleep_millisecs); + thp_write_num("khugepaged/max_ptes_none", khugepaged->max_ptes_none); + thp_write_num("khugepaged/max_ptes_swap", khugepaged->max_ptes_swap); + thp_write_num("khugepaged/max_ptes_shared", khugepaged->max_ptes_shared); + thp_write_num("khugepaged/pages_to_scan", khugepaged->pages_to_scan); + + if (dev_queue_read_ahead_path[0]) + write_num(dev_queue_read_ahead_path, settings->read_ahead_kb); + + for (i = 0; i < NR_ORDERS; i++) { + if (!((1 << i) & orders)) + continue; + snprintf(path, PATH_MAX, "hugepages-%ukB/enabled", + (getpagesize() >> 10) << i); + enabled = settings->hugepages[i].enabled; + thp_write_string(path, thp_enabled_strings[enabled]); + } +} + +struct thp_settings *thp_current_settings(void) +{ + if (!settings_index) { + printf("Fail: No settings set"); + exit(EXIT_FAILURE); + } + return settings_stack + settings_index - 1; +} + +void thp_push_settings(struct thp_settings *settings) +{ + if (settings_index >= MAX_SETTINGS_DEPTH) { + printf("Fail: Settings stack exceeded"); + exit(EXIT_FAILURE); + } + settings_stack[settings_index++] = *settings; + thp_write_settings(thp_current_settings()); +} + +void thp_pop_settings(void) +{ + if (settings_index <= 0) { + printf("Fail: Settings stack empty"); + exit(EXIT_FAILURE); + } + --settings_index; + thp_write_settings(thp_current_settings()); +} + +void thp_restore_settings(void) +{ + thp_write_settings(&saved_settings); +} + +void thp_save_settings(void) +{ + thp_read_settings(&saved_settings); +} + +void thp_set_read_ahead_path(char *path) +{ + if (!path) { + dev_queue_read_ahead_path[0] = '\0'; + return; + } + + strncpy(dev_queue_read_ahead_path, path, + sizeof(dev_queue_read_ahead_path)); + dev_queue_read_ahead_path[sizeof(dev_queue_read_ahead_path) - 1] = '\0'; +} + +unsigned long thp_supported_orders(void) +{ + unsigned long orders = 0; + char path[PATH_MAX]; + char buf[256]; + int ret; + int i; + + for (i = 0; i < NR_ORDERS; i++) { + ret = snprintf(path, PATH_MAX, THP_SYSFS "hugepages-%ukB/enabled", + (getpagesize() >> 10) << i); + if (ret >= PATH_MAX) { + printf("%s: Pathname is too long\n", __func__); + exit(EXIT_FAILURE); + } + + ret = read_file(path, buf, sizeof(buf)); + if (ret) + orders |= 1UL << i; + } + + return orders; +} diff --git a/tools/testing/selftests/mm/thp_settings.h b/tools/testing/selftests/mm/thp_settings.h new file mode 100644 index 0000000000..71cbff05f4 --- /dev/null +++ b/tools/testing/selftests/mm/thp_settings.h @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __THP_SETTINGS_H__ +#define __THP_SETTINGS_H__ + +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> + +enum thp_enabled { + THP_NEVER, + THP_ALWAYS, + THP_INHERIT, + THP_MADVISE, +}; + +enum thp_defrag { + THP_DEFRAG_ALWAYS, + THP_DEFRAG_DEFER, + THP_DEFRAG_DEFER_MADVISE, + THP_DEFRAG_MADVISE, + THP_DEFRAG_NEVER, +}; + +enum shmem_enabled { + SHMEM_ALWAYS, + SHMEM_WITHIN_SIZE, + SHMEM_ADVISE, + SHMEM_NEVER, + SHMEM_DENY, + SHMEM_FORCE, +}; + +#define NR_ORDERS 20 + +struct hugepages_settings { + enum thp_enabled enabled; +}; + +struct khugepaged_settings { + bool defrag; + unsigned int alloc_sleep_millisecs; + unsigned int scan_sleep_millisecs; + unsigned int max_ptes_none; + unsigned int max_ptes_swap; + unsigned int max_ptes_shared; + unsigned long pages_to_scan; +}; + +struct thp_settings { + enum thp_enabled thp_enabled; + enum thp_defrag thp_defrag; + enum shmem_enabled shmem_enabled; + bool use_zero_page; + struct khugepaged_settings khugepaged; + unsigned long read_ahead_kb; + struct hugepages_settings hugepages[NR_ORDERS]; +}; + +int read_file(const char *path, char *buf, size_t buflen); +int write_file(const char *path, const char *buf, size_t buflen); +const unsigned long read_num(const char *path); +void write_num(const char *path, unsigned long num); + +int thp_read_string(const char *name, const char * const strings[]); +void thp_write_string(const char *name, const char *val); +const unsigned long thp_read_num(const char *name); +void thp_write_num(const char *name, unsigned long num); + +void thp_write_settings(struct thp_settings *settings); +void thp_read_settings(struct thp_settings *settings); +struct thp_settings *thp_current_settings(void); +void thp_push_settings(struct thp_settings *settings); +void thp_pop_settings(void); +void thp_restore_settings(void); +void thp_save_settings(void); + +void thp_set_read_ahead_path(char *path); +unsigned long thp_supported_orders(void); + +#endif /* __THP_SETTINGS_H__ */ diff --git a/tools/testing/selftests/mm/thuge-gen.c b/tools/testing/selftests/mm/thuge-gen.c index 16ed4dfa73..622987f12c 100644 --- a/tools/testing/selftests/mm/thuge-gen.c +++ b/tools/testing/selftests/mm/thuge-gen.c @@ -3,7 +3,8 @@ Before running this huge pages for each huge page size must have been reserved. - For large pages beyond MAX_ORDER (like 1GB on x86) boot options must be used. + For large pages beyond MAX_PAGE_ORDER (like 1GB on x86) boot options must + be used. Also shmmax must be increased. And you need to run as root to work around some weird permissions in shm. And nothing using huge pages should run in parallel. diff --git a/tools/testing/selftests/mm/uffd-common.c b/tools/testing/selftests/mm/uffd-common.c index ba6777cdf4..7ad6ba660c 100644 --- a/tools/testing/selftests/mm/uffd-common.c +++ b/tools/testing/selftests/mm/uffd-common.c @@ -17,6 +17,7 @@ bool map_shared; bool test_uffdio_wp = true; unsigned long long *count_verify; uffd_test_ops_t *uffd_test_ops; +uffd_test_case_ops_t *uffd_test_case_ops; atomic_bool ready_for_fork; static int uffd_mem_fd_create(off_t mem_size, bool hugetlb) @@ -263,7 +264,7 @@ static inline void munmap_area(void **area) *area = NULL; } -static void uffd_test_ctx_clear(void) +void uffd_test_ctx_clear(void) { size_t i; @@ -299,7 +300,11 @@ int uffd_test_ctx_init(uint64_t features, const char **errmsg) unsigned long nr, cpu; int ret; - uffd_test_ctx_clear(); + if (uffd_test_case_ops && uffd_test_case_ops->pre_alloc) { + ret = uffd_test_case_ops->pre_alloc(errmsg); + if (ret) + return ret; + } ret = uffd_test_ops->allocate_area((void **)&area_src, true); ret |= uffd_test_ops->allocate_area((void **)&area_dst, false); @@ -309,6 +314,12 @@ int uffd_test_ctx_init(uint64_t features, const char **errmsg) return ret; } + if (uffd_test_case_ops && uffd_test_case_ops->post_alloc) { + ret = uffd_test_case_ops->post_alloc(errmsg); + if (ret) + return ret; + } + ret = userfaultfd_open(&features); if (ret) { if (errmsg) @@ -623,6 +634,30 @@ int copy_page(int ufd, unsigned long offset, bool wp) return __copy_page(ufd, offset, false, wp); } +int move_page(int ufd, unsigned long offset, unsigned long len) +{ + struct uffdio_move uffdio_move; + + if (offset + len > nr_pages * page_size) + err("unexpected offset %lu and length %lu\n", offset, len); + uffdio_move.dst = (unsigned long) area_dst + offset; + uffdio_move.src = (unsigned long) area_src + offset; + uffdio_move.len = len; + uffdio_move.mode = UFFDIO_MOVE_MODE_ALLOW_SRC_HOLES; + uffdio_move.move = 0; + if (ioctl(ufd, UFFDIO_MOVE, &uffdio_move)) { + /* real retval in uffdio_move.move */ + if (uffdio_move.move != -EEXIST) + err("UFFDIO_MOVE error: %"PRId64, + (int64_t)uffdio_move.move); + wake_range(ufd, uffdio_move.dst, len); + } else if (uffdio_move.move != len) { + err("UFFDIO_MOVE error: %"PRId64, (int64_t)uffdio_move.move); + } else + return 1; + return 0; +} + int uffd_open_dev(unsigned int flags) { int fd, uffd; diff --git a/tools/testing/selftests/mm/uffd-common.h b/tools/testing/selftests/mm/uffd-common.h index 1f0d573f30..cc5629c3d2 100644 --- a/tools/testing/selftests/mm/uffd-common.h +++ b/tools/testing/selftests/mm/uffd-common.h @@ -91,6 +91,12 @@ struct uffd_test_ops { }; typedef struct uffd_test_ops uffd_test_ops_t; +struct uffd_test_case_ops { + int (*pre_alloc)(const char **errmsg); + int (*post_alloc)(const char **errmsg); +}; +typedef struct uffd_test_case_ops uffd_test_case_ops_t; + extern unsigned long nr_cpus, nr_pages, nr_pages_per_cpu, page_size; extern char *area_src, *area_src_alias, *area_dst, *area_dst_alias, *area_remap; extern int uffd, uffd_flags, finished, *pipefd, test_type; @@ -104,15 +110,18 @@ extern uffd_test_ops_t anon_uffd_test_ops; extern uffd_test_ops_t shmem_uffd_test_ops; extern uffd_test_ops_t hugetlb_uffd_test_ops; extern uffd_test_ops_t *uffd_test_ops; +extern uffd_test_case_ops_t *uffd_test_case_ops; void uffd_stats_report(struct uffd_args *args, int n_cpus); int uffd_test_ctx_init(uint64_t features, const char **errmsg); +void uffd_test_ctx_clear(void); int userfaultfd_open(uint64_t *features); int uffd_read_msg(int ufd, struct uffd_msg *msg); void wp_range(int ufd, __u64 start, __u64 len, bool wp); void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_args *args); int __copy_page(int ufd, unsigned long offset, bool retry, bool wp); int copy_page(int ufd, unsigned long offset, bool wp); +int move_page(int ufd, unsigned long offset, unsigned long len); void *uffd_poll_thread(void *arg); int uffd_open_dev(unsigned int flags); diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c index 469e0476af..7e83829bbb 100644 --- a/tools/testing/selftests/mm/uffd-stress.c +++ b/tools/testing/selftests/mm/uffd-stress.c @@ -323,8 +323,10 @@ static int userfaultfd_stress(void) uffd_stats_reset(args, nr_cpus); /* bounce pass */ - if (stress(args)) + if (stress(args)) { + uffd_test_ctx_clear(); return 1; + } /* Clear all the write protections if there is any */ if (test_uffdio_wp) @@ -354,6 +356,7 @@ static int userfaultfd_stress(void) uffd_stats_report(args, nr_cpus); } + uffd_test_ctx_clear(); return 0; } diff --git a/tools/testing/selftests/mm/uffd-unit-tests.c b/tools/testing/selftests/mm/uffd-unit-tests.c index 92d51768b7..21ec23206a 100644 --- a/tools/testing/selftests/mm/uffd-unit-tests.c +++ b/tools/testing/selftests/mm/uffd-unit-tests.c @@ -23,6 +23,9 @@ #define MEM_ALL (MEM_ANON | MEM_SHMEM | MEM_SHMEM_PRIVATE | \ MEM_HUGETLB | MEM_HUGETLB_PRIVATE) +#define ALIGN_UP(x, align_to) \ + ((__typeof__(x))((((unsigned long)(x)) + ((align_to)-1)) & ~((align_to)-1))) + struct mem_type { const char *name; unsigned int mem_flag; @@ -78,6 +81,7 @@ typedef struct { uffd_test_fn uffd_fn; unsigned int mem_targets; uint64_t uffd_feature_required; + uffd_test_case_ops_t *test_case_ops; } uffd_test_case_t; static void uffd_test_report(void) @@ -185,6 +189,7 @@ uffd_setup_environment(uffd_test_args_t *args, uffd_test_case_t *test, { map_shared = mem_type->shared; uffd_test_ops = mem_type->mem_ops; + uffd_test_case_ops = test->test_case_ops; if (mem_type->mem_flag & (MEM_HUGETLB_PRIVATE | MEM_HUGETLB)) page_size = default_huge_page_size(); @@ -1072,6 +1077,188 @@ static void uffd_poison_test(uffd_test_args_t *targs) uffd_test_pass(); } +static void +uffd_move_handle_fault_common(struct uffd_msg *msg, struct uffd_args *args, + unsigned long len) +{ + unsigned long offset; + + if (msg->event != UFFD_EVENT_PAGEFAULT) + err("unexpected msg event %u", msg->event); + + if (msg->arg.pagefault.flags & + (UFFD_PAGEFAULT_FLAG_WP | UFFD_PAGEFAULT_FLAG_MINOR | UFFD_PAGEFAULT_FLAG_WRITE)) + err("unexpected fault type %llu", msg->arg.pagefault.flags); + + offset = (char *)(unsigned long)msg->arg.pagefault.address - area_dst; + offset &= ~(len-1); + + if (move_page(uffd, offset, len)) + args->missing_faults++; +} + +static void uffd_move_handle_fault(struct uffd_msg *msg, + struct uffd_args *args) +{ + uffd_move_handle_fault_common(msg, args, page_size); +} + +static void uffd_move_pmd_handle_fault(struct uffd_msg *msg, + struct uffd_args *args) +{ + uffd_move_handle_fault_common(msg, args, read_pmd_pagesize()); +} + +static void +uffd_move_test_common(uffd_test_args_t *targs, unsigned long chunk_size, + void (*handle_fault)(struct uffd_msg *msg, struct uffd_args *args)) +{ + unsigned long nr; + pthread_t uffd_mon; + char c; + unsigned long long count; + struct uffd_args args = { 0 }; + char *orig_area_src, *orig_area_dst; + unsigned long step_size, step_count; + unsigned long src_offs = 0; + unsigned long dst_offs = 0; + + /* Prevent source pages from being mapped more than once */ + if (madvise(area_src, nr_pages * page_size, MADV_DONTFORK)) + err("madvise(MADV_DONTFORK) failure"); + + if (uffd_register(uffd, area_dst, nr_pages * page_size, + true, false, false)) + err("register failure"); + + args.handle_fault = handle_fault; + if (pthread_create(&uffd_mon, NULL, uffd_poll_thread, &args)) + err("uffd_poll_thread create"); + + step_size = chunk_size / page_size; + step_count = nr_pages / step_size; + + if (chunk_size > page_size) { + char *aligned_src = ALIGN_UP(area_src, chunk_size); + char *aligned_dst = ALIGN_UP(area_dst, chunk_size); + + if (aligned_src != area_src || aligned_dst != area_dst) { + src_offs = (aligned_src - area_src) / page_size; + dst_offs = (aligned_dst - area_dst) / page_size; + step_count--; + } + orig_area_src = area_src; + orig_area_dst = area_dst; + area_src = aligned_src; + area_dst = aligned_dst; + } + + /* + * Read each of the pages back using the UFFD-registered mapping. We + * expect that the first time we touch a page, it will result in a missing + * fault. uffd_poll_thread will resolve the fault by moving source + * page to destination. + */ + for (nr = 0; nr < step_count * step_size; nr += step_size) { + unsigned long i; + + /* Check area_src content */ + for (i = 0; i < step_size; i++) { + count = *area_count(area_src, nr + i); + if (count != count_verify[src_offs + nr + i]) + err("nr %lu source memory invalid %llu %llu\n", + nr + i, count, count_verify[src_offs + nr + i]); + } + + /* Faulting into area_dst should move the page or the huge page */ + for (i = 0; i < step_size; i++) { + count = *area_count(area_dst, nr + i); + if (count != count_verify[dst_offs + nr + i]) + err("nr %lu memory corruption %llu %llu\n", + nr, count, count_verify[dst_offs + nr + i]); + } + + /* Re-check area_src content which should be empty */ + for (i = 0; i < step_size; i++) { + count = *area_count(area_src, nr + i); + if (count != 0) + err("nr %lu move failed %llu %llu\n", + nr, count, count_verify[src_offs + nr + i]); + } + } + if (step_size > page_size) { + area_src = orig_area_src; + area_dst = orig_area_dst; + } + + if (write(pipefd[1], &c, sizeof(c)) != sizeof(c)) + err("pipe write"); + if (pthread_join(uffd_mon, NULL)) + err("join() failed"); + + if (args.missing_faults != step_count || args.minor_faults != 0) + uffd_test_fail("stats check error"); + else + uffd_test_pass(); +} + +static void uffd_move_test(uffd_test_args_t *targs) +{ + uffd_move_test_common(targs, page_size, uffd_move_handle_fault); +} + +static void uffd_move_pmd_test(uffd_test_args_t *targs) +{ + if (madvise(area_dst, nr_pages * page_size, MADV_HUGEPAGE)) + err("madvise(MADV_HUGEPAGE) failure"); + uffd_move_test_common(targs, read_pmd_pagesize(), + uffd_move_pmd_handle_fault); +} + +static void uffd_move_pmd_split_test(uffd_test_args_t *targs) +{ + if (madvise(area_dst, nr_pages * page_size, MADV_NOHUGEPAGE)) + err("madvise(MADV_NOHUGEPAGE) failure"); + uffd_move_test_common(targs, read_pmd_pagesize(), + uffd_move_pmd_handle_fault); +} + +static int prevent_hugepages(const char **errmsg) +{ + /* This should be done before source area is populated */ + if (madvise(area_src, nr_pages * page_size, MADV_NOHUGEPAGE)) { + /* Ignore only if CONFIG_TRANSPARENT_HUGEPAGE=n */ + if (errno != EINVAL) { + if (errmsg) + *errmsg = "madvise(MADV_NOHUGEPAGE) failed"; + return -errno; + } + } + return 0; +} + +static int request_hugepages(const char **errmsg) +{ + /* This should be done before source area is populated */ + if (madvise(area_src, nr_pages * page_size, MADV_HUGEPAGE)) { + if (errmsg) { + *errmsg = (errno == EINVAL) ? + "CONFIG_TRANSPARENT_HUGEPAGE is not set" : + "madvise(MADV_HUGEPAGE) failed"; + } + return -errno; + } + return 0; +} + +struct uffd_test_case_ops uffd_move_test_case_ops = { + .post_alloc = prevent_hugepages, +}; + +struct uffd_test_case_ops uffd_move_test_pmd_case_ops = { + .post_alloc = request_hugepages, +}; + /* * Test the returned uffdio_register.ioctls with different register modes. * Note that _UFFDIO_ZEROPAGE is tested separately in the zeropage test. @@ -1150,6 +1337,27 @@ uffd_test_case_t uffd_tests[] = { .uffd_feature_required = 0, }, { + .name = "move", + .uffd_fn = uffd_move_test, + .mem_targets = MEM_ANON, + .uffd_feature_required = UFFD_FEATURE_MOVE, + .test_case_ops = &uffd_move_test_case_ops, + }, + { + .name = "move-pmd", + .uffd_fn = uffd_move_pmd_test, + .mem_targets = MEM_ANON, + .uffd_feature_required = UFFD_FEATURE_MOVE, + .test_case_ops = &uffd_move_test_pmd_case_ops, + }, + { + .name = "move-pmd-split", + .uffd_fn = uffd_move_pmd_split_test, + .mem_targets = MEM_ANON, + .uffd_feature_required = UFFD_FEATURE_MOVE, + .test_case_ops = &uffd_move_test_pmd_case_ops, + }, + { .name = "wp-fork", .uffd_fn = uffd_wp_fork_test, .mem_targets = MEM_ALL, @@ -1336,6 +1544,7 @@ int main(int argc, char *argv[]) continue; } test->uffd_fn(&args); + uffd_test_ctx_clear(); } } diff --git a/tools/testing/selftests/mm/vm_util.c b/tools/testing/selftests/mm/vm_util.c index 3082b40492..05736c6157 100644 --- a/tools/testing/selftests/mm/vm_util.c +++ b/tools/testing/selftests/mm/vm_util.c @@ -4,6 +4,7 @@ #include <dirent.h> #include <sys/ioctl.h> #include <linux/userfaultfd.h> +#include <linux/fs.h> #include <sys/syscall.h> #include <unistd.h> #include "../kselftest.h" @@ -28,19 +29,92 @@ uint64_t pagemap_get_entry(int fd, char *start) return entry; } +static uint64_t __pagemap_scan_get_categories(int fd, char *start, struct page_region *r) +{ + struct pm_scan_arg arg; + + arg.start = (uintptr_t)start; + arg.end = (uintptr_t)(start + psize()); + arg.vec = (uintptr_t)r; + arg.vec_len = 1; + arg.flags = 0; + arg.size = sizeof(struct pm_scan_arg); + arg.max_pages = 0; + arg.category_inverted = 0; + arg.category_mask = 0; + arg.category_anyof_mask = PAGE_IS_WPALLOWED | PAGE_IS_WRITTEN | PAGE_IS_FILE | + PAGE_IS_PRESENT | PAGE_IS_SWAPPED | PAGE_IS_PFNZERO | + PAGE_IS_HUGE | PAGE_IS_SOFT_DIRTY; + arg.return_mask = arg.category_anyof_mask; + + return ioctl(fd, PAGEMAP_SCAN, &arg); +} + +static uint64_t pagemap_scan_get_categories(int fd, char *start) +{ + struct page_region r; + long ret; + + ret = __pagemap_scan_get_categories(fd, start, &r); + if (ret < 0) + ksft_exit_fail_msg("PAGEMAP_SCAN failed: %s\n", strerror(errno)); + if (ret == 0) + return 0; + return r.categories; +} + +/* `start` is any valid address. */ +static bool pagemap_scan_supported(int fd, char *start) +{ + static int supported = -1; + int ret; + + if (supported != -1) + return supported; + + /* Provide an invalid address in order to trigger EFAULT. */ + ret = __pagemap_scan_get_categories(fd, start, (struct page_region *) ~0UL); + if (ret == 0) + ksft_exit_fail_msg("PAGEMAP_SCAN succeeded unexpectedly\n"); + + supported = errno == EFAULT; + + return supported; +} + +static bool page_entry_is(int fd, char *start, char *desc, + uint64_t pagemap_flags, uint64_t pagescan_flags) +{ + bool m = pagemap_get_entry(fd, start) & pagemap_flags; + + if (pagemap_scan_supported(fd, start)) { + bool s = pagemap_scan_get_categories(fd, start) & pagescan_flags; + + if (m == s) + return m; + + ksft_exit_fail_msg( + "read and ioctl return unmatched results for %s: %d %d", desc, m, s); + } + return m; +} + bool pagemap_is_softdirty(int fd, char *start) { - return pagemap_get_entry(fd, start) & PM_SOFT_DIRTY; + return page_entry_is(fd, start, "soft-dirty", + PM_SOFT_DIRTY, PAGE_IS_SOFT_DIRTY); } bool pagemap_is_swapped(int fd, char *start) { - return pagemap_get_entry(fd, start) & PM_SWAP; + return page_entry_is(fd, start, "swap", PM_SWAP, PAGE_IS_SWAPPED); } bool pagemap_is_populated(int fd, char *start) { - return pagemap_get_entry(fd, start) & (PM_PRESENT | PM_SWAP); + return page_entry_is(fd, start, "populated", + PM_PRESENT | PM_SWAP, + PAGE_IS_PRESENT | PAGE_IS_SWAPPED); } unsigned long pagemap_get_pfn(int fd, char *start) diff --git a/tools/testing/selftests/mm/vm_util.h b/tools/testing/selftests/mm/vm_util.h index c02990bbd5..9007c420d5 100644 --- a/tools/testing/selftests/mm/vm_util.h +++ b/tools/testing/selftests/mm/vm_util.h @@ -3,7 +3,7 @@ #include <stdbool.h> #include <sys/mman.h> #include <err.h> -#include <string.h> /* ffsl() */ +#include <strings.h> /* ffsl() */ #include <unistd.h> /* _SC_PAGESIZE */ #define BIT_ULL(nr) (1ULL << (nr)) |