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| author | David Rientjes <rientjes@google.com> | 2007-10-16 23:25:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-17 08:42:46 -0700 |
| commit | 3ff566963ce804809af9e32331b287eedeeff501 (patch) | |
| tree | dd71c5613b27e8c309d7bbe48798e6cd5c4145cc /mm/oom_kill.c | |
| parent | bbe373f2c60b2aa36c3231734a5afc5271a06718 (diff) | |
| download | lwn-3ff566963ce804809af9e32331b287eedeeff501.tar.gz lwn-3ff566963ce804809af9e32331b287eedeeff501.zip | |
oom: do not take callback_mutex
Since no task descriptor's 'cpuset' field is dereferenced in the execution of
the OOM killer anymore, it is no longer necessary to take callback_mutex.
[akpm@linux-foundation.org: restore cpuset_lock for other patches]
Cc: Andrea Arcangeli <andrea@suse.de>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/oom_kill.c')
| -rw-r--r-- | mm/oom_kill.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c index d9bba82923d5..183a964ca61b 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -463,7 +463,6 @@ void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order) * NUMA) that may require different handling. */ constraint = constrained_alloc(zonelist, gfp_mask); - cpuset_lock(); read_lock(&tasklist_lock); switch (constraint) { @@ -495,7 +494,6 @@ retry: /* Found nothing?!?! Either we hang forever, or we panic. */ if (!p) { read_unlock(&tasklist_lock); - cpuset_unlock(); panic("Out of memory and no killable processes...\n"); } @@ -508,7 +506,6 @@ retry: out: read_unlock(&tasklist_lock); - cpuset_unlock(); /* * Give "p" a good chance of killing itself before we |