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authorDavid Rientjes <rientjes@google.com>2015-09-08 15:00:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-08 15:35:28 -0700
commit28c015d07507e164d93b33498b4e482ff81c0e9b (patch)
treeb413cac1d2dcff31395acf5c47403c1e27019237 /include/linux/gfp.h
parent998ef75ddb5709bbea0bf1506cd2717348a3c647 (diff)
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 <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/gfp.h')
-rw-r--r--include/linux/gfp.h5
1 files changed, 4 insertions, 1 deletions
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