diff options
Diffstat (limited to 'man2/alloc_hugepages.2')
| -rw-r--r-- | man2/alloc_hugepages.2 | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/man2/alloc_hugepages.2 b/man2/alloc_hugepages.2 index 33671da..0aba97e 100644 --- a/man2/alloc_hugepages.2 +++ b/man2/alloc_hugepages.2 @@ -2,7 +2,7 @@ .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" -.TH alloc_hugepages 2 2023-03-30 "Linux man-pages 6.05.01" +.TH alloc_hugepages 2 2023-10-31 "Linux man-pages 6.7" .SH NAME alloc_hugepages, free_hugepages \- allocate or free huge pages .SH SYNOPSIS @@ -15,7 +15,7 @@ size_t " len , .BI "int syscall(SYS_free_hugepages, void *" addr ); .\" asmlinkage int sys_free_hugepages(unsigned long addr); .fi -.PP +.P .IR Note : glibc provides no wrappers for these system calls, necessitating the use of @@ -31,7 +31,7 @@ They existed only on i386 and ia64 (when built with In Linux 2.4.20, the syscall numbers exist, but the calls fail with the error .BR ENOSYS . -.PP +.P On i386 the memory management hardware knows about ordinary pages (4\ KiB) and huge pages (2 or 4\ MiB). Similarly ia64 knows about huge pages of @@ -39,7 +39,7 @@ several sizes. These system calls serve to map huge pages into the process's memory or to free them again. Huge pages are locked into memory, and are not swapped. -.PP +.P The .I key argument is an identifier. @@ -48,7 +48,7 @@ not inherited by children. When positive the pages are shared with other applications using the same .IR key , and inherited by child processes. -.PP +.P The .I addr argument of @@ -63,12 +63,12 @@ argument of .BR alloc_hugepages () is a hint, that the kernel may or may not follow. Addresses must be properly aligned. -.PP +.P The .I len argument is the length of the required segment. It must be a multiple of the huge page size. -.PP +.P The .I prot argument specifies the memory protection of the segment. @@ -76,7 +76,7 @@ It is one of .BR PROT_READ , .BR PROT_WRITE , .BR PROT_EXEC . -.PP +.P The .I flag argument is ignored, unless @@ -124,11 +124,11 @@ Memory backed by huge pages (if the CPU supports them) is obtained by using .BR mmap (2) to map files in this virtual filesystem. -.PP +.P The maximal number of huge pages can be specified using the .B hugepages= boot parameter. -.\".PP +.\".P .\" requires CONFIG_HUGETLB_PAGE (under "Processor type and features") .\" and CONFIG_HUGETLBFS (under "Filesystems"). .\" mount \-t hugetlbfs hugetlbfs /huge |