diff options
| author | David Rientjes <rientjes@google.com> | 2009-06-16 15:32:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 19:47:43 -0700 |
| commit | 82553a937f12352c26fe457510ebab3f512cd3fa (patch) | |
| tree | c3df31e9953d5f56491576ba019fdc2cd87af926 /mm | |
| parent | 4d8b9135c30ccbe46e621fefd862969819003fd6 (diff) | |
| download | lwn-82553a937f12352c26fe457510ebab3f512cd3fa.tar.gz lwn-82553a937f12352c26fe457510ebab3f512cd3fa.zip | |
oom: invoke oom killer for __GFP_NOFAIL
The oom killer must be invoked regardless of the order if the allocation
is __GFP_NOFAIL, otherwise it will loop forever when reclaim fails to free
some memory.
Cc: Nick Piggin <npiggin@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Dave Hansen <dave@linux.vnet.ibm.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')
| -rw-r--r-- | mm/page_alloc.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index c95a77cd581b..c5fb017c9430 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1561,7 +1561,7 @@ __alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order, goto out; /* The OOM killer will not help higher order allocs */ - if (order > PAGE_ALLOC_COSTLY_ORDER) + if (order > PAGE_ALLOC_COSTLY_ORDER && !(gfp_mask & __GFP_NOFAIL)) goto out; /* Exhausted what can be done so it's blamo time */ @@ -1781,11 +1781,13 @@ rebalance: goto got_pg; /* - * The OOM killer does not trigger for high-order allocations - * but if no progress is being made, there are no other - * options and retrying is unlikely to help + * The OOM killer does not trigger for high-order + * ~__GFP_NOFAIL allocations so if no progress is being + * made, there are no other options and retrying is + * unlikely to help. */ - if (order > PAGE_ALLOC_COSTLY_ORDER) + if (order > PAGE_ALLOC_COSTLY_ORDER && + !(gfp_mask & __GFP_NOFAIL)) goto nopage; goto restart; |