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-rw-r--r--src/oom/oomd-util.c648
1 files changed, 648 insertions, 0 deletions
diff --git a/src/oom/oomd-util.c b/src/oom/oomd-util.c
new file mode 100644
index 0000000..f9f0af2
--- /dev/null
+++ b/src/oom/oomd-util.c
@@ -0,0 +1,648 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <sys/xattr.h>
+#include <unistd.h>
+
+#include "errno-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "format-util.h"
+#include "memstream-util.h"
+#include "oomd-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "procfs-util.h"
+#include "signal-util.h"
+#include "sort-util.h"
+#include "stat-util.h"
+#include "stdio-util.h"
+#include "user-util.h"
+
+DEFINE_HASH_OPS_WITH_VALUE_DESTRUCTOR(
+ oomd_cgroup_ctx_hash_ops,
+ char,
+ string_hash_func,
+ string_compare_func,
+ OomdCGroupContext,
+ oomd_cgroup_context_free);
+
+static int log_kill(const PidRef *pid, int sig, void *userdata) {
+ log_debug("oomd attempting to kill " PID_FMT " with %s", pid->pid, signal_to_string(sig));
+ return 0;
+}
+
+static int increment_oomd_xattr(const char *path, const char *xattr, uint64_t num_procs_killed) {
+ _cleanup_free_ char *value = NULL;
+ char buf[DECIMAL_STR_MAX(uint64_t) + 1];
+ uint64_t curr_count = 0;
+ int r;
+
+ assert(path);
+ assert(xattr);
+
+ r = cg_get_xattr_malloc(path, xattr, &value);
+ if (r < 0 && !ERRNO_IS_XATTR_ABSENT(r))
+ return r;
+
+ if (!isempty(value)) {
+ r = safe_atou64(value, &curr_count);
+ if (r < 0)
+ return r;
+ }
+
+ if (curr_count > UINT64_MAX - num_procs_killed)
+ return -EOVERFLOW;
+
+ xsprintf(buf, "%"PRIu64, curr_count + num_procs_killed);
+ r = cg_set_xattr(path, xattr, buf, strlen(buf), 0);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+OomdCGroupContext *oomd_cgroup_context_free(OomdCGroupContext *ctx) {
+ if (!ctx)
+ return NULL;
+
+ free(ctx->path);
+ return mfree(ctx);
+}
+
+int oomd_pressure_above(Hashmap *h, usec_t duration, Set **ret) {
+ _cleanup_set_free_ Set *targets = NULL;
+ OomdCGroupContext *ctx;
+ char *key;
+ int r;
+
+ assert(h);
+ assert(ret);
+
+ targets = set_new(NULL);
+ if (!targets)
+ return -ENOMEM;
+
+ HASHMAP_FOREACH_KEY(ctx, key, h) {
+ if (ctx->memory_pressure.avg10 > ctx->mem_pressure_limit) {
+ usec_t diff;
+
+ if (ctx->mem_pressure_limit_hit_start == 0)
+ ctx->mem_pressure_limit_hit_start = now(CLOCK_MONOTONIC);
+
+ diff = now(CLOCK_MONOTONIC) - ctx->mem_pressure_limit_hit_start;
+ if (diff >= duration) {
+ r = set_put(targets, ctx);
+ if (r < 0)
+ return -ENOMEM;
+ }
+ } else
+ ctx->mem_pressure_limit_hit_start = 0;
+ }
+
+ if (!set_isempty(targets)) {
+ *ret = TAKE_PTR(targets);
+ return 1;
+ }
+
+ *ret = NULL;
+ return 0;
+}
+
+uint64_t oomd_pgscan_rate(const OomdCGroupContext *c) {
+ uint64_t last_pgscan;
+
+ assert(c);
+
+ /* If last_pgscan > pgscan, assume the cgroup was recreated and reset last_pgscan to zero.
+ * pgscan is monotonic and in practice should not decrease (except in the recreation case). */
+ last_pgscan = c->last_pgscan;
+ if (c->last_pgscan > c->pgscan) {
+ log_debug("Last pgscan %"PRIu64" greater than current pgscan %"PRIu64" for %s. Using last pgscan of zero.",
+ c->last_pgscan, c->pgscan, c->path);
+ last_pgscan = 0;
+ }
+
+ return c->pgscan - last_pgscan;
+}
+
+bool oomd_mem_available_below(const OomdSystemContext *ctx, int threshold_permyriad) {
+ uint64_t mem_threshold;
+
+ assert(ctx);
+ assert(threshold_permyriad <= 10000);
+
+ mem_threshold = ctx->mem_total * threshold_permyriad / (uint64_t) 10000;
+ return LESS_BY(ctx->mem_total, ctx->mem_used) < mem_threshold;
+}
+
+bool oomd_swap_free_below(const OomdSystemContext *ctx, int threshold_permyriad) {
+ uint64_t swap_threshold;
+
+ assert(ctx);
+ assert(threshold_permyriad <= 10000);
+
+ swap_threshold = ctx->swap_total * threshold_permyriad / (uint64_t) 10000;
+ return (ctx->swap_total - ctx->swap_used) < swap_threshold;
+}
+
+int oomd_fetch_cgroup_oom_preference(OomdCGroupContext *ctx, const char *prefix) {
+ uid_t uid;
+ int r;
+
+ assert(ctx);
+
+ prefix = empty_to_root(prefix);
+
+ if (!path_startswith(ctx->path, prefix))
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
+ "%s is not a descendant of %s", ctx->path, prefix);
+
+ r = cg_get_owner(ctx->path, &uid);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to get owner/group from %s: %m", ctx->path);
+
+ if (uid != 0) {
+ uid_t prefix_uid;
+
+ r = cg_get_owner(prefix, &prefix_uid);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to get owner/group from %s: %m", prefix);
+
+ if (uid != prefix_uid) {
+ ctx->preference = MANAGED_OOM_PREFERENCE_NONE;
+ return 0;
+ }
+ }
+
+ /* Ignore most errors when reading the xattr since it is usually unset and cgroup xattrs are only used
+ * as an optional feature of systemd-oomd (and the system might not even support them). */
+ r = cg_get_xattr_bool(ctx->path, "user.oomd_avoid");
+ if (r == -ENOMEM)
+ return log_oom_debug();
+ if (r < 0 && !ERRNO_IS_XATTR_ABSENT(r))
+ log_debug_errno(r, "Failed to get xattr user.oomd_avoid, ignoring: %m");
+ ctx->preference = r > 0 ? MANAGED_OOM_PREFERENCE_AVOID : ctx->preference;
+
+ r = cg_get_xattr_bool(ctx->path, "user.oomd_omit");
+ if (r == -ENOMEM)
+ return log_oom_debug();
+ if (r < 0 && !ERRNO_IS_XATTR_ABSENT(r))
+ log_debug_errno(r, "Failed to get xattr user.oomd_omit, ignoring: %m");
+ ctx->preference = r > 0 ? MANAGED_OOM_PREFERENCE_OMIT : ctx->preference;
+
+ return 0;
+}
+
+int oomd_sort_cgroup_contexts(Hashmap *h, oomd_compare_t compare_func, const char *prefix, OomdCGroupContext ***ret) {
+ _cleanup_free_ OomdCGroupContext **sorted = NULL;
+ OomdCGroupContext *item;
+ size_t k = 0;
+ int r;
+
+ assert(h);
+ assert(compare_func);
+ assert(ret);
+
+ sorted = new0(OomdCGroupContext*, hashmap_size(h));
+ if (!sorted)
+ return -ENOMEM;
+
+ HASHMAP_FOREACH(item, h) {
+ /* Skip over cgroups that are not valid candidates or are explicitly marked for omission */
+ if (item->path && prefix && !path_startswith(item->path, prefix))
+ continue;
+
+ r = oomd_fetch_cgroup_oom_preference(item, prefix);
+ if (r == -ENOMEM)
+ return r;
+
+ if (item->preference == MANAGED_OOM_PREFERENCE_OMIT)
+ continue;
+
+ sorted[k++] = item;
+ }
+
+ typesafe_qsort(sorted, k, compare_func);
+
+ *ret = TAKE_PTR(sorted);
+
+ assert(k <= INT_MAX);
+ return (int) k;
+}
+
+int oomd_cgroup_kill(const char *path, bool recurse, bool dry_run) {
+ _cleanup_set_free_ Set *pids_killed = NULL;
+ int r;
+
+ assert(path);
+
+ if (dry_run) {
+ _cleanup_free_ char *cg_path = NULL;
+
+ r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, path, NULL, &cg_path);
+ if (r < 0)
+ return r;
+
+ log_info("oomd dry-run: Would have tried to kill %s with recurse=%s", cg_path, true_false(recurse));
+ return 0;
+ }
+
+ pids_killed = set_new(NULL);
+ if (!pids_killed)
+ return -ENOMEM;
+
+ r = increment_oomd_xattr(path, "user.oomd_ooms", 1);
+ if (r < 0)
+ log_debug_errno(r, "Failed to set user.oomd_ooms before kill: %m");
+
+ if (recurse)
+ r = cg_kill_recursive(path, SIGKILL, CGROUP_IGNORE_SELF, pids_killed, log_kill, NULL);
+ else
+ r = cg_kill(path, SIGKILL, CGROUP_IGNORE_SELF, pids_killed, log_kill, NULL);
+
+ /* The cgroup could have been cleaned up after we have sent SIGKILL to all of the processes, but before
+ * we could do one last iteration of cgroup.procs to check. Or the service unit could have exited and
+ * was removed between picking candidates and coming into this function. In either case, let's log
+ * about it let the caller decide what to do once they know how many PIDs were killed. */
+ if (IN_SET(r, -ENOENT, -ENODEV))
+ log_debug_errno(r, "Error when sending SIGKILL to processes in cgroup path %s, ignoring: %m", path);
+ else if (r < 0)
+ return r;
+
+ if (set_isempty(pids_killed))
+ log_debug("Nothing killed when attempting to kill %s", path);
+
+ r = increment_oomd_xattr(path, "user.oomd_kill", set_size(pids_killed));
+ if (r < 0)
+ log_debug_errno(r, "Failed to set user.oomd_kill on kill: %m");
+
+ return set_size(pids_killed) != 0;
+}
+
+typedef void (*dump_candidate_func)(const OomdCGroupContext *ctx, FILE *f, const char *prefix);
+
+static int dump_kill_candidates(OomdCGroupContext **sorted, int n, int dump_until, dump_candidate_func dump_func) {
+ _cleanup_(memstream_done) MemStream m = {};
+ FILE *f;
+
+ /* Try dumping top offendors, ignoring any errors that might happen. */
+
+ f = memstream_init(&m);
+ if (!f)
+ return -ENOMEM;
+
+ fprintf(f, "Considered %d cgroups for killing, top candidates were:\n", n);
+ for (int i = 0; i < dump_until; i++)
+ dump_func(sorted[i], f, "\t");
+
+ return memstream_dump(LOG_INFO, &m);
+}
+
+int oomd_kill_by_pgscan_rate(Hashmap *h, const char *prefix, bool dry_run, char **ret_selected) {
+ _cleanup_free_ OomdCGroupContext **sorted = NULL;
+ int n, r, ret = 0;
+ int dump_until;
+
+ assert(h);
+ assert(ret_selected);
+
+ n = oomd_sort_cgroup_contexts(h, compare_pgscan_rate_and_memory_usage, prefix, &sorted);
+ if (n < 0)
+ return n;
+
+ dump_until = MIN(n, DUMP_ON_KILL_COUNT);
+ for (int i = 0; i < n; i++) {
+ /* Skip cgroups with no reclaim and memory usage; it won't alleviate pressure.
+ * Continue since there might be "avoid" cgroups at the end. */
+ if (sorted[i]->pgscan == 0 && sorted[i]->current_memory_usage == 0)
+ continue;
+
+ r = oomd_cgroup_kill(sorted[i]->path, /* recurse= */ true, /* dry_run= */ dry_run);
+ if (r == -ENOMEM)
+ return r; /* Treat oom as a hard error */
+ if (r < 0) {
+ if (ret == 0)
+ ret = r;
+ continue; /* Try to find something else to kill */
+ }
+
+ dump_until = MAX(dump_until, i + 1);
+ char *selected = strdup(sorted[i]->path);
+ if (!selected)
+ return -ENOMEM;
+ *ret_selected = selected;
+ ret = r;
+ break;
+ }
+
+ dump_kill_candidates(sorted, n, dump_until, oomd_dump_memory_pressure_cgroup_context);
+
+ return ret;
+}
+
+int oomd_kill_by_swap_usage(Hashmap *h, uint64_t threshold_usage, bool dry_run, char **ret_selected) {
+ _cleanup_free_ OomdCGroupContext **sorted = NULL;
+ int n, r, ret = 0;
+ int dump_until;
+
+ assert(h);
+ assert(ret_selected);
+
+ n = oomd_sort_cgroup_contexts(h, compare_swap_usage, NULL, &sorted);
+ if (n < 0)
+ return n;
+
+ dump_until = MIN(n, DUMP_ON_KILL_COUNT);
+ /* Try to kill cgroups with non-zero swap usage until we either succeed in killing or we get to a cgroup with
+ * no swap usage. Threshold killing only cgroups with more than threshold swap usage. */
+ for (int i = 0; i < n; i++) {
+ /* Skip over cgroups with not enough swap usage. Don't break since there might be "avoid"
+ * cgroups at the end. */
+ if (sorted[i]->swap_usage <= threshold_usage)
+ continue;
+
+ r = oomd_cgroup_kill(sorted[i]->path, /* recurse= */ true, /* dry_run= */ dry_run);
+ if (r == -ENOMEM)
+ return r; /* Treat oom as a hard error */
+ if (r < 0) {
+ if (ret == 0)
+ ret = r;
+ continue; /* Try to find something else to kill */
+ }
+
+ dump_until = MAX(dump_until, i + 1);
+ char *selected = strdup(sorted[i]->path);
+ if (!selected)
+ return -ENOMEM;
+ *ret_selected = selected;
+ ret = r;
+ break;
+ }
+
+ dump_kill_candidates(sorted, n, dump_until, oomd_dump_swap_cgroup_context);
+
+ return ret;
+}
+
+int oomd_cgroup_context_acquire(const char *path, OomdCGroupContext **ret) {
+ _cleanup_(oomd_cgroup_context_freep) OomdCGroupContext *ctx = NULL;
+ _cleanup_free_ char *p = NULL, *val = NULL;
+ bool is_root;
+ int r;
+
+ assert(path);
+ assert(ret);
+
+ ctx = new0(OomdCGroupContext, 1);
+ if (!ctx)
+ return -ENOMEM;
+
+ is_root = empty_or_root(path);
+ ctx->preference = MANAGED_OOM_PREFERENCE_NONE;
+
+ r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, path, "memory.pressure", &p);
+ if (r < 0)
+ return log_debug_errno(r, "Error getting cgroup memory pressure path from %s: %m", path);
+
+ r = read_resource_pressure(p, PRESSURE_TYPE_FULL, &ctx->memory_pressure);
+ if (r < 0)
+ return log_debug_errno(r, "Error parsing memory pressure from %s: %m", p);
+
+ if (is_root) {
+ r = procfs_memory_get_used(&ctx->current_memory_usage);
+ if (r < 0)
+ return log_debug_errno(r, "Error getting memory used from procfs: %m");
+ } else {
+ r = cg_get_attribute_as_uint64(SYSTEMD_CGROUP_CONTROLLER, path, "memory.current", &ctx->current_memory_usage);
+ if (r < 0)
+ return log_debug_errno(r, "Error getting memory.current from %s: %m", path);
+
+ r = cg_get_attribute_as_uint64(SYSTEMD_CGROUP_CONTROLLER, path, "memory.min", &ctx->memory_min);
+ if (r < 0)
+ return log_debug_errno(r, "Error getting memory.min from %s: %m", path);
+
+ r = cg_get_attribute_as_uint64(SYSTEMD_CGROUP_CONTROLLER, path, "memory.low", &ctx->memory_low);
+ if (r < 0)
+ return log_debug_errno(r, "Error getting memory.low from %s: %m", path);
+
+ r = cg_get_attribute_as_uint64(SYSTEMD_CGROUP_CONTROLLER, path, "memory.swap.current", &ctx->swap_usage);
+ if (r == -ENODATA)
+ /* The kernel can be compiled without support for memory.swap.* files,
+ * or it can be disabled with boot param 'swapaccount=0' */
+ log_once(LOG_WARNING, "No kernel support for memory.swap.current from %s (try boot param swapaccount=1), ignoring.", path);
+ else if (r < 0)
+ return log_debug_errno(r, "Error getting memory.swap.current from %s: %m", path);
+
+ r = cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER, path, "memory.stat", STRV_MAKE("pgscan"), &val);
+ if (r < 0)
+ return log_debug_errno(r, "Error getting pgscan from memory.stat under %s: %m", path);
+
+ r = safe_atou64(val, &ctx->pgscan);
+ if (r < 0)
+ return log_debug_errno(r, "Error converting pgscan value to uint64_t: %m");
+ }
+
+ ctx->path = strdup(empty_to_root(path));
+ if (!ctx->path)
+ return -ENOMEM;
+
+ *ret = TAKE_PTR(ctx);
+ return 0;
+}
+
+int oomd_system_context_acquire(const char *proc_meminfo_path, OomdSystemContext *ret) {
+ _cleanup_fclose_ FILE *f = NULL;
+ unsigned field_filled = 0;
+ OomdSystemContext ctx = {};
+ uint64_t mem_available, swap_free;
+ int r;
+
+ enum {
+ MEM_TOTAL = 1U << 0,
+ MEM_AVAILABLE = 1U << 1,
+ SWAP_TOTAL = 1U << 2,
+ SWAP_FREE = 1U << 3,
+ ALL = MEM_TOTAL|MEM_AVAILABLE|SWAP_TOTAL|SWAP_FREE,
+ };
+
+ assert(proc_meminfo_path);
+ assert(ret);
+
+ f = fopen(proc_meminfo_path, "re");
+ if (!f)
+ return -errno;
+
+ for (;;) {
+ _cleanup_free_ char *line = NULL;
+ char *word;
+
+ r = read_line(f, LONG_LINE_MAX, &line);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return -EINVAL;
+
+ if ((word = startswith(line, "MemTotal:"))) {
+ field_filled |= MEM_TOTAL;
+ r = convert_meminfo_value_to_uint64_bytes(word, &ctx.mem_total);
+ } else if ((word = startswith(line, "MemAvailable:"))) {
+ field_filled |= MEM_AVAILABLE;
+ r = convert_meminfo_value_to_uint64_bytes(word, &mem_available);
+ } else if ((word = startswith(line, "SwapTotal:"))) {
+ field_filled |= SWAP_TOTAL;
+ r = convert_meminfo_value_to_uint64_bytes(word, &ctx.swap_total);
+ } else if ((word = startswith(line, "SwapFree:"))) {
+ field_filled |= SWAP_FREE;
+ r = convert_meminfo_value_to_uint64_bytes(word, &swap_free);
+ } else
+ continue;
+
+ if (r < 0)
+ return log_debug_errno(r, "Error converting '%s' from %s to uint64_t: %m", line, proc_meminfo_path);
+
+ if (field_filled == ALL)
+ break;
+ }
+
+ if (field_filled != ALL)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "%s is missing expected fields", proc_meminfo_path);
+
+ if (mem_available > ctx.mem_total)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
+ "MemAvailable (%" PRIu64 ") cannot be greater than MemTotal (%" PRIu64 ") %m",
+ mem_available,
+ ctx.mem_total);
+
+ if (swap_free > ctx.swap_total)
+ return log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
+ "SwapFree (%" PRIu64 ") cannot be greater than SwapTotal (%" PRIu64 ") %m",
+ swap_free,
+ ctx.swap_total);
+
+ ctx.mem_used = ctx.mem_total - mem_available;
+ ctx.swap_used = ctx.swap_total - swap_free;
+
+ *ret = ctx;
+ return 0;
+}
+
+int oomd_insert_cgroup_context(Hashmap *old_h, Hashmap *new_h, const char *path) {
+ _cleanup_(oomd_cgroup_context_freep) OomdCGroupContext *curr_ctx = NULL;
+ OomdCGroupContext *old_ctx;
+ int r;
+
+ assert(new_h);
+ assert(path);
+
+ path = empty_to_root(path);
+
+ r = oomd_cgroup_context_acquire(path, &curr_ctx);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to get OomdCGroupContext for %s: %m", path);
+
+ assert_se(streq(path, curr_ctx->path));
+
+ old_ctx = hashmap_get(old_h, path);
+ if (old_ctx) {
+ curr_ctx->last_pgscan = old_ctx->pgscan;
+ curr_ctx->mem_pressure_limit = old_ctx->mem_pressure_limit;
+ curr_ctx->mem_pressure_limit_hit_start = old_ctx->mem_pressure_limit_hit_start;
+ curr_ctx->last_had_mem_reclaim = old_ctx->last_had_mem_reclaim;
+ }
+
+ if (oomd_pgscan_rate(curr_ctx) > 0)
+ curr_ctx->last_had_mem_reclaim = now(CLOCK_MONOTONIC);
+
+ r = hashmap_put(new_h, curr_ctx->path, curr_ctx);
+ if (r < 0)
+ return r;
+
+ TAKE_PTR(curr_ctx);
+ return 0;
+}
+
+void oomd_update_cgroup_contexts_between_hashmaps(Hashmap *old_h, Hashmap *curr_h) {
+ OomdCGroupContext *ctx;
+
+ assert(old_h);
+ assert(curr_h);
+
+ HASHMAP_FOREACH(ctx, curr_h) {
+ OomdCGroupContext *old_ctx;
+
+ old_ctx = hashmap_get(old_h, ctx->path);
+ if (!old_ctx)
+ continue;
+
+ ctx->last_pgscan = old_ctx->pgscan;
+ ctx->mem_pressure_limit = old_ctx->mem_pressure_limit;
+ ctx->mem_pressure_limit_hit_start = old_ctx->mem_pressure_limit_hit_start;
+ ctx->last_had_mem_reclaim = old_ctx->last_had_mem_reclaim;
+
+ if (oomd_pgscan_rate(ctx) > 0)
+ ctx->last_had_mem_reclaim = now(CLOCK_MONOTONIC);
+ }
+}
+
+void oomd_dump_swap_cgroup_context(const OomdCGroupContext *ctx, FILE *f, const char *prefix) {
+ assert(ctx);
+ assert(f);
+
+ if (!empty_or_root(ctx->path))
+ fprintf(f,
+ "%sPath: %s\n"
+ "%s\tSwap Usage: %s\n",
+ strempty(prefix), ctx->path,
+ strempty(prefix), FORMAT_BYTES(ctx->swap_usage));
+ else
+ fprintf(f,
+ "%sPath: %s\n"
+ "%s\tSwap Usage: (see System Context)\n",
+ strempty(prefix), ctx->path,
+ strempty(prefix));
+}
+
+void oomd_dump_memory_pressure_cgroup_context(const OomdCGroupContext *ctx, FILE *f, const char *prefix) {
+ assert(ctx);
+ assert(f);
+
+ fprintf(f,
+ "%sPath: %s\n"
+ "%s\tMemory Pressure Limit: %lu.%02lu%%\n"
+ "%s\tPressure: Avg10: %lu.%02lu Avg60: %lu.%02lu Avg300: %lu.%02lu Total: %s\n"
+ "%s\tCurrent Memory Usage: %s\n",
+ strempty(prefix), ctx->path,
+ strempty(prefix), LOADAVG_INT_SIDE(ctx->mem_pressure_limit), LOADAVG_DECIMAL_SIDE(ctx->mem_pressure_limit),
+ strempty(prefix),
+ LOADAVG_INT_SIDE(ctx->memory_pressure.avg10), LOADAVG_DECIMAL_SIDE(ctx->memory_pressure.avg10),
+ LOADAVG_INT_SIDE(ctx->memory_pressure.avg60), LOADAVG_DECIMAL_SIDE(ctx->memory_pressure.avg60),
+ LOADAVG_INT_SIDE(ctx->memory_pressure.avg300), LOADAVG_DECIMAL_SIDE(ctx->memory_pressure.avg300),
+ FORMAT_TIMESPAN(ctx->memory_pressure.total, USEC_PER_SEC),
+ strempty(prefix), FORMAT_BYTES(ctx->current_memory_usage));
+
+ if (!empty_or_root(ctx->path))
+ fprintf(f,
+ "%s\tMemory Min: %s\n"
+ "%s\tMemory Low: %s\n"
+ "%s\tPgscan: %" PRIu64 "\n"
+ "%s\tLast Pgscan: %" PRIu64 "\n",
+ strempty(prefix), FORMAT_BYTES_CGROUP_PROTECTION(ctx->memory_min),
+ strempty(prefix), FORMAT_BYTES_CGROUP_PROTECTION(ctx->memory_low),
+ strempty(prefix), ctx->pgscan,
+ strempty(prefix), ctx->last_pgscan);
+}
+
+void oomd_dump_system_context(const OomdSystemContext *ctx, FILE *f, const char *prefix) {
+ assert(ctx);
+ assert(f);
+
+ fprintf(f,
+ "%sMemory: Used: %s Total: %s\n"
+ "%sSwap: Used: %s Total: %s\n",
+ strempty(prefix),
+ FORMAT_BYTES(ctx->mem_used),
+ FORMAT_BYTES(ctx->mem_total),
+ strempty(prefix),
+ FORMAT_BYTES(ctx->swap_used),
+ FORMAT_BYTES(ctx->swap_total));
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 09:12:14 +0000