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Revert "oomd: move check if processes can be killed into oomd_cgroup_kill()"

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This reverts commit 332bce5bd7.

The revert is needed because with the PreKill hook, oomd_cgroup_kill()
is not goint to really kill processes but it just creates the callbacks.
So the check is deferred to the real kill.
This commit is contained in:
Matteo Croce
2025-11-24 12:58:07 +01:00
parent 8fba6e2b40
commit 67cbfbbf4b
1 changed files with 12 additions and 10 deletions
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22
src/oom/oomd-util.c
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@@ -239,16 +239,6 @@ int oomd_cgroup_kill(const char *path, bool recurse, bool dry_run) {
assert(path);
/* First try to send SIG0 recursively to ensure all child cgroups can be killed. */
if (recurse)
r = cg_kill_recursive(path, /* sig= */ 0, CGROUP_IGNORE_SELF,
/* killed_pids= */ NULL, /* log_kill= */ NULL, /* userdata= */ NULL);
else
r = cg_kill(path, /* sig= */ 0, CGROUP_IGNORE_SELF,
/* killed_pids= */ NULL, /* log_kill= */ NULL, /* userdata= */ NULL);
if (r < 0)
return log_debug_errno(r, "Failed to send SIG0 to processes in cgroup '%s': %m", path);
if (dry_run) {
_cleanup_free_ char *cg_path = NULL;
@@ -349,6 +339,12 @@ int oomd_kill_by_pgscan_rate(Hashmap *h, const char *prefix, bool dry_run, char
if (c->pgscan == 0 && c->current_memory_usage == 0)
continue;
/* First try killing recursively to ensure all child cgroups can be killed. */
r = cg_kill_recursive(c->path, /* sig= */ 0, CGROUP_IGNORE_SELF, /* killed_pids= */ NULL,
/* log_kill= */ NULL, /* userdata= */ NULL);
if (r < 0)
continue;
r = oomd_cgroup_kill(c->path, /* recurse= */ true, /* dry_run= */ dry_run);
if (r == -ENOMEM)
return r; /* Treat oom as a hard error */
@@ -393,6 +389,12 @@ int oomd_kill_by_swap_usage(Hashmap *h, uint64_t threshold_usage, bool dry_run,
if (c->swap_usage <= threshold_usage)
continue;
/* First try killing recursively to ensure all child cgroups can be killed. */
r = cg_kill_recursive(c->path, /* sig= */ 0, CGROUP_IGNORE_SELF, /* killed_pids= */ NULL,
/* log_kill= */ NULL, /* userdata= */ NULL);
if (r < 0)
continue;
r = oomd_cgroup_kill(c->path, /* recurse= */ true, /* dry_run= */ dry_run);
if (r == -ENOMEM)
return r; /* Treat oom as a hard error */