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authorFam Zheng <famz@redhat.com>2014-11-06 20:44:36 +0800
committerBenjamin LaHaise <bcrl@kvack.org>2014-12-13 17:50:20 -0500
commit5f785de588735306ec4d7c875caf9d28481c8b21 (patch)
tree7f405dcbe7e4b53d554ee6e4040a331a505dcd92 /mm/mremap.c
parente4a0d3e720e7e508749c1439b5ba3aff56c92976 (diff)
downloadlinux-5f785de588735306ec4d7c875caf9d28481c8b21.tar.gz
aio: Skip timer for io_getevents if timeout=0
In this case, it is basically a polling. Let's not involve timer at all because that would hurt performance for application event loops. In an arbitrary test I've done, io_getevents syscall elapsed time reduces from 50000+ nanoseconds to a few hundereds. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Diffstat (limited to 'mm/mremap.c')
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