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| author | zhong jiang <zhongjiang@huawei.com> | 2016-10-07 17:01:19 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-07 18:46:29 -0700 |
| commit | 6213055f2c068b63078649457391ecea9b489ea3 (patch) | |
| tree | bb0c8260b211a968de71a05190155fe76da8c3bf /mm/mmap.c | |
| parent | ac34dcd263a3afe9a2e4d58a2d93bb66d700ac7c (diff) | |
| download | blackbird-op-linux-6213055f2c068b63078649457391ecea9b489ea3.tar.gz blackbird-op-linux-6213055f2c068b63078649457391ecea9b489ea3.zip | |
mm,ksm: add __GFP_HIGH to the allocation in alloc_stable_node()
According to Hugh's suggestion, alloc_stable_node() with GFP_KERNEL can
in rare cases cause a hung task warning.
At present, if alloc_stable_node() allocation fails, two break_cows may
want to allocate a couple of pages, and the issue will come up when free
memory is under pressure.
We fix it by adding __GFP_HIGH to GFP, to grant access to memory
reserves, increasing the likelihood of allocation success.
[akpm@linux-foundation.org: tweak comment]
Link: http://lkml.kernel.org/r/1474354484-58233-1-git-send-email-zhongjiang@huawei.com
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Suggested-by: Hugh Dickins <hughd@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/mmap.c')
0 files changed, 0 insertions, 0 deletions
