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Commit 28c015d0 authored by David Rientjes's avatar David Rientjes Committed by Linus Torvalds
Browse files

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: default avatarDavid Rientjes <rientjes@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 998ef75d

include/linux/gfp.h

+4 −1
Original line number Diff line number Diff line
@@ -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