From 28c015d07507e164d93b33498b4e482ff81c0e9b Mon Sep 17 00:00:00 2001 From: David Rientjes Date: Tue, 8 Sep 2015 15:00:31 -0700 Subject: [PATCH] mm: improve __GFP_NORETRY comment based on implementation Explicitly state that __GFP_NORETRY will attempt direct reclaim and memory compaction before returning NULL and that the oom killer is not called in the current implementation of the page allocator. [akpm@linux-foundation.org: s/has/have/] Signed-off-by: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/gfp.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/include/linux/gfp.h b/include/linux/gfp.h index ad35f300b9a4..3bd64b115999 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -63,7 +63,10 @@ struct vm_area_struct; * but it is definitely preferable to use the flag rather than opencode endless * loop around allocator. * - * __GFP_NORETRY: The VM implementation must not retry indefinitely. + * __GFP_NORETRY: The VM implementation must not retry indefinitely and will + * return NULL when direct reclaim and memory compaction have failed to allow + * the allocation to succeed. The OOM killer is not called with the current + * implementation. * * __GFP_MOVABLE: Flag that this page will be movable by the page migration * mechanism or reclaimed