diff options
| author | Paul Jackson <pj@sgi.com> | 2005-09-06 15:18:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-07 16:57:40 -0700 |
| commit | ef08e3b4981aebf2ba9bd7025ef7210e8eec07ce (patch) | |
| tree | 3b5386e011c87dde384115c8eb0d6961c2536025 /mm/oom_kill.c | |
| parent | 9bf2229f8817677127a60c177aefce1badd22d7b (diff) | |
| download | lwn-ef08e3b4981aebf2ba9bd7025ef7210e8eec07ce.tar.gz lwn-ef08e3b4981aebf2ba9bd7025ef7210e8eec07ce.zip | |
[PATCH] cpusets: confine oom_killer to mem_exclusive cpuset
Now the real motivation for this cpuset mem_exclusive patch series seems
trivial.
This patch keeps a task in or under one mem_exclusive cpuset from provoking an
oom kill of a task under a non-overlapping mem_exclusive cpuset. Since only
interrupt and GFP_ATOMIC allocations are allowed to escape mem_exclusive
containment, there is little to gain from oom killing a task under a
non-overlapping mem_exclusive cpuset, as almost all kernel and user memory
allocation must come from disjoint memory nodes.
This patch enables configuring a system so that a runaway job under one
mem_exclusive cpuset cannot cause the killing of a job in another such cpuset
that might be using very high compute and memory resources for a prolonged
time.
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/oom_kill.c')
| -rw-r--r-- | mm/oom_kill.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 3a1d46502938..5ec8da12cfd9 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -20,6 +20,7 @@ #include <linux/swap.h> #include <linux/timex.h> #include <linux/jiffies.h> +#include <linux/cpuset.h> /* #define DEBUG */ @@ -152,6 +153,10 @@ static struct task_struct * select_bad_process(void) continue; if (p->oomkilladj == OOM_DISABLE) continue; + /* If p's nodes don't overlap ours, it won't help to kill p. */ + if (!cpuset_excl_nodes_overlap(p)) + continue; + /* * This is in the process of releasing memory so for wait it * to finish before killing some other task by mistake. |