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authorJ. Bruce Fields <bfields@redhat.com>2017-06-28 13:34:15 -0400
committerJ. Bruce Fields <bfields@redhat.com>2017-06-28 13:34:15 -0400
commit9a1d168e1bc2893120bb7c0d9932dd22f97d0b55 (patch)
treef7d419f1601419aa0aebda102a6b14bdf7653443 /mm/util.c
parentbb2a8b0cd116219777b99cb71fe9e24b31d3f521 (diff)
parent32c1431eea4881a6b17bd7c639315010aeefa452 (diff)
Merge tag 'v4.12-rc5' into nfsd tree
Update to get f0c3192ceee3 "virtio_net: lower limit on buffer size". That bug was interfering with my nfsd testing.
Diffstat (limited to 'mm/util.c')
-rw-r--r--mm/util.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/mm/util.c b/mm/util.c
index 464df3489903..26be6407abd7 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -357,8 +357,11 @@ void *kvmalloc_node(size_t size, gfp_t flags, int node)
WARN_ON_ONCE((flags & GFP_KERNEL) != GFP_KERNEL);
/*
- * Make sure that larger requests are not too disruptive - no OOM
- * killer and no allocation failure warnings as we have a fallback
+ * We want to attempt a large physically contiguous block first because
+ * it is less likely to fragment multiple larger blocks and therefore
+ * contribute to a long term fragmentation less than vmalloc fallback.
+ * However make sure that larger requests are not too disruptive - no
+ * OOM killer and no allocation failure warnings as we have a fallback.
*/
if (size > PAGE_SIZE) {
kmalloc_flags |= __GFP_NOWARN;