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authorLucas Stach <l.stach@pengutronix.de>2017-01-24 15:18:05 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-24 16:26:14 -0800
commit424f6c4818bbf1b8ccf58aa012ecc19c0bb9b446 (patch)
tree186092c8fa59000397fd7c573bc0ffeb896880d4 /mm
parentaa2efd5ea4041754da4046c3d2e7edaac9526258 (diff)
downloadlinux-424f6c4818bbf1b8ccf58aa012ecc19c0bb9b446.tar.bz2
mm: alloc_contig: re-allow CMA to compact FS pages
Commit 73e64c51afc5 ("mm, compaction: allow compaction for GFP_NOFS requests") changed compation to skip FS pages if not explicitly allowed to touch them, but missed to update the CMA compact_control. This leads to a very high isolation failure rate, crippling performance of CMA even on a lightly loaded system. Re-allow CMA to compact FS pages by setting the correct GFP flags, restoring CMA behavior and performance to the kernel 4.9 level. Fixes: 73e64c51afc5 (mm, compaction: allow compaction for GFP_NOFS requests) Link: http://lkml.kernel.org/r/20170113115155.24335-1-l.stach@pengutronix.de Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Mel Gorman <mgorman@techsingularity.net> 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.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d604d2596b7b..41d5e2e2d8ce 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7248,6 +7248,7 @@ int alloc_contig_range(unsigned long start, unsigned long end,
.zone = page_zone(pfn_to_page(start)),
.mode = MIGRATE_SYNC,
.ignore_skip_hint = true,
+ .gfp_mask = GFP_KERNEL,
};
INIT_LIST_HEAD(&cc.migratepages);