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| author | KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> | 2010-08-10 00:19:33 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-10 03:45:00 (GMT) |
| commit | 7c59aec830c7ed6c745bd513982cee3563ed20c1 (patch) | |
| tree | f06d2c626d0ab0ff2f9880d98a50e60be4af7816 | |
| parent | 1489fa14cb757b496c8fa2b63097dbcee6690695 (diff) | |
| download | linux-7c59aec830c7ed6c745bd513982cee3563ed20c1.tar.xz | |
oom: don't try to kill oom_unkillable child
Presently, badness() doesn't care about either CPUSET nor mempolicy. Then
if the victim child process have disjoint nodemask, OOM Killer might kill
innocent process.
This patch fixes it.
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/oom_kill.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 26ae697..6e9f16a 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -429,7 +429,7 @@ static int oom_kill_task(struct task_struct *p) static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, unsigned long points, struct mem_cgroup *mem, - const char *message) + nodemask_t *nodemask, const char *message) { struct task_struct *victim = p; struct task_struct *child; @@ -469,6 +469,8 @@ static int oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, continue; if (mem && !task_in_mem_cgroup(child, mem)) continue; + if (!has_intersects_mems_allowed(child, nodemask)) + continue; /* badness() returns 0 if the thread is unkillable */ child_points = badness(child, uptime.tv_sec); @@ -519,7 +521,7 @@ retry: if (!p || PTR_ERR(p) == -1UL) goto out; - if (oom_kill_process(p, gfp_mask, 0, points, mem, + if (oom_kill_process(p, gfp_mask, 0, points, mem, NULL, "Memory cgroup out of memory")) goto retry; out: @@ -679,6 +681,7 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, * the tasklist scan. */ if (!oom_kill_process(current, gfp_mask, order, 0, NULL, + nodemask, "Out of memory (oom_kill_allocating_task)")) return; } @@ -697,7 +700,7 @@ retry: panic("Out of memory and no killable processes...\n"); } - if (oom_kill_process(p, gfp_mask, order, points, NULL, + if (oom_kill_process(p, gfp_mask, order, points, NULL, nodemask, "Out of memory")) goto retry; read_unlock(&tasklist_lock); |