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authorTejun Heo <tj@kernel.org>2012-01-11 00:08:28 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-11 01:30:45 +0100
commit1ebb7044c9142c67d1d2b04d84010b4810a43fd8 (patch)
treebfacd21f2aabf0b727d678797e2764d010918f29 /mm/hugetlb.c
parentmempool: drop unnecessary and incorrect BUG_ON() from mempool_destroy() (diff)
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mempool: fix first round failure behavior
mempool modifies gfp_mask so that the backing allocator doesn't try too hard or trigger warning message when there's pool to fall back on. In addition, for the first try, it removes __GFP_WAIT and IO, so that it doesn't trigger reclaim or wait when allocation can be fulfilled from pool; however, when that allocation fails and pool is empty too, it waits for the pool to be replenished before retrying. Allocation which could have succeeded after a bit of reclaim has to wait on the reserved items and it's not like mempool doesn't retry with __GFP_WAIT and IO. It just does that *after* someone returns an element, pointlessly delaying things. Fix it by retrying immediately if the first round of allocation attempts w/o __GFP_WAIT and IO fails. [akpm@linux-foundation.org: shorten the lock hold time] Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
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