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| author | Nick Piggin <npiggin@suse.de> | 2006-09-25 23:31:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:48:48 -0700 |
| commit | 7887a3da753e1ba8244556cc9a2b38c815bfe256 (patch) | |
| tree | f3563927615c6b9c260f7ca84567c7bca2dac91f /mm | |
| parent | 4ff1ffb4870b007b86f21e5f27eeb11498c4c077 (diff) | |
| download | blackbird-op-linux-7887a3da753e1ba8244556cc9a2b38c815bfe256.tar.gz blackbird-op-linux-7887a3da753e1ba8244556cc9a2b38c815bfe256.zip | |
[PATCH] oom: cpuset hint
cpuset_excl_nodes_overlap does not always indicate that killing a task will
not free any memory we for us. For example, we may be asking for an
allocation from _anywhere_ in the machine, or the task in question may be
pinning memory that is outside its cpuset. Fix this by just causing
cpuset_excl_nodes_overlap to reduce the badness rather than disallow it.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-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')
| -rw-r--r-- | mm/oom_kill.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 7d056843fa2d..4f815b06ac1b 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -129,6 +129,14 @@ unsigned long badness(struct task_struct *p, unsigned long uptime) points /= 4; /* + * If p's nodes don't overlap ours, it may still help to kill p + * because p may have allocated or otherwise mapped memory on + * this node before. However it will be less likely. + */ + if (!cpuset_excl_nodes_overlap(p)) + points /= 8; + + /* * Adjust the score by oomkilladj. */ if (p->oomkilladj) { @@ -198,9 +206,6 @@ static struct task_struct *select_bad_process(unsigned long *ppoints) 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 wait for it |
