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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2017-09-09 01:13:22 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-09 03:26:47 +0200 |
| commit | f19360f015d338a80bec4d56c2e4fc01680ffd8f (patch) | |
| tree | 039927b25920a01013caee8dc6aecf035e41b8a8 /mm/page_alloc.c | |
| parent | tools/testing/selftests/kcmp/kcmp_test.c: add KCMP_EPOLL_TFD testing (diff) | |
| download | linux-f19360f015d338a80bec4d56c2e4fc01680ffd8f.tar.xz linux-f19360f015d338a80bec4d56c2e4fc01680ffd8f.zip | |
mm/page_alloc.c: apply gfp_allowed_mask before the first allocation attempt
We are by error initializing alloc_flags before gfp_allowed_mask is
applied. This could cause problems after pm_restrict_gfp_mask() is called
during suspend operation. Apply gfp_allowed_mask before initializing
alloc_flags so that the first allocation attempt uses correct flags.
Link: http://lkml.kernel.org/r/201709020016.ADJ21342.OFLJHOOSMFVtFQ@I-love.SAKURA.ne.jp
Fixes: 83d4ca8148fd9092 ("mm, page_alloc: move __GFP_HARDWALL modifications out of the fastpath")
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
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/page_alloc.c')
| -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 45583cd8dd56..c841af88836a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4183,10 +4183,11 @@ __alloc_pages_nodemask(gfp_t gfp_mask, unsigned int order, int preferred_nid, { struct page *page; unsigned int alloc_flags = ALLOC_WMARK_LOW; - gfp_t alloc_mask = gfp_mask; /* The gfp_t that was actually used for allocation */ + gfp_t alloc_mask; /* The gfp_t that was actually used for allocation */ struct alloc_context ac = { }; gfp_mask &= gfp_allowed_mask; + alloc_mask = gfp_mask; if (!prepare_alloc_pages(gfp_mask, order, preferred_nid, nodemask, &ac, &alloc_mask, &alloc_flags)) return NULL; |