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| author | Mel Gorman <mgorman@techsingularity.net> | 2016-05-19 17:13:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-19 19:12:14 -0700 |
| commit | 3777999dd47ec00ec34a151b1d93c0a2b721e822 (patch) | |
| tree | 1c64a296774ffc929bf71ab7aab9023379f406dd /mm | |
| parent | 83d4ca8148fd9092715fd8ef75b30bbfd67fd2a9 (diff) | |
| download | op-kernel-dev-3777999dd47ec00ec34a151b1d93c0a2b721e822.zip op-kernel-dev-3777999dd47ec00ec34a151b1d93c0a2b721e822.tar.gz | |
mm, page_alloc: check once if a zone has isolated pageblocks
When bulk freeing pages from the per-cpu lists the zone is checked for
isolated pageblocks on every release. This patch checks it once per
drain.
[mgorman@techsingularity.net: fix locking radce, per Vlastimil]
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
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.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 48afc1a..a3b7eb8 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -831,8 +831,10 @@ static void free_pcppages_bulk(struct zone *zone, int count, int batch_free = 0; int to_free = count; unsigned long nr_scanned; + bool isolated_pageblocks; spin_lock(&zone->lock); + isolated_pageblocks = has_isolate_pageblock(zone); nr_scanned = zone_page_state(zone, NR_PAGES_SCANNED); if (nr_scanned) __mod_zone_page_state(zone, NR_PAGES_SCANNED, -nr_scanned); @@ -870,7 +872,7 @@ static void free_pcppages_bulk(struct zone *zone, int count, /* MIGRATE_ISOLATE page should not go to pcplists */ VM_BUG_ON_PAGE(is_migrate_isolate(mt), page); /* Pageblock could have been isolated meanwhile */ - if (unlikely(has_isolate_pageblock(zone))) + if (unlikely(isolated_pageblocks)) mt = get_pageblock_migratetype(page); __free_one_page(page, page_to_pfn(page), zone, 0, mt); |
