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| author | Lucas Stach <l.stach@pengutronix.de> | 2017-01-24 15:18:05 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-01-24 16:26:14 -0800 |
| commit | 424f6c4818bbf1b8ccf58aa012ecc19c0bb9b446 (patch) | |
| tree | 186092c8fa59000397fd7c573bc0ffeb896880d4 /mm/page_alloc.c | |
| parent | aa2efd5ea4041754da4046c3d2e7edaac9526258 (diff) | |
| download | linux-424f6c4818bbf1b8ccf58aa012ecc19c0bb9b446.tar.gz linux-424f6c4818bbf1b8ccf58aa012ecc19c0bb9b446.tar.xz | |
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/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 1 |
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); |