diff options
| author | Laura Abbott <lauraa@codeaurora.org> | 2013-02-12 13:30:04 -0800 |
|---|---|---|
| committer | David Keitel <dkeitel@codeaurora.org> | 2016-03-22 11:03:38 -0700 |
| commit | 81f620153455f246c124fb2d9ef5559e714e3889 (patch) | |
| tree | 6672364f1d58b33d6604fd0a03fa269e30b57348 | |
| parent | e48a20a27c9c052bd4d13797d4789b674a388cef (diff) | |
mm: Don't put CMA pages on per cpu lists
CMA allocations rely on being able to migrate pages out
quickly to fulfill the allocations. Most use cases for
movable allocations meet this requirement. File system
allocations may take an unaccpetably long time to
migrate, which creates delays from CMA. Prevent CMA
pages from ending up on the per-cpu lists to avoid
code paths grabbing CMA pages on the fast path. CMA
pages can still be allocated as a fallback under tight
memory pressure.
CRs-Fixed: 452508
Change-Id: I79a28f697275a2a1870caabae53c8ea345b4b47d
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
| -rw-r--r-- | mm/page_alloc.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 5f948b46451e..896c6c63fe58 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2061,7 +2061,8 @@ void free_hot_cold_page(struct page *page, bool cold) * excessively into the page allocator */ if (migratetype >= MIGRATE_PCPTYPES) { - if (unlikely(is_migrate_isolate(migratetype))) { + if (unlikely(is_migrate_isolate(migratetype)) || + is_migrate_cma(migratetype)) { free_one_page(zone, page, pfn, 0, migratetype); goto out; } |