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| author | Fam Zheng <famz@redhat.com> | 2014-11-06 20:44:36 +0800 |
|---|---|---|
| committer | Benjamin LaHaise <bcrl@kvack.org> | 2014-12-13 17:50:20 -0500 |
| commit | 5f785de588735306ec4d7c875caf9d28481c8b21 (patch) | |
| tree | 7f405dcbe7e4b53d554ee6e4040a331a505dcd92 /mm | |
| parent | e4a0d3e720e7e508749c1439b5ba3aff56c92976 (diff) | |
| download | linux-stable-5f785de588735306ec4d7c875caf9d28481c8b21.tar.gz linux-stable-5f785de588735306ec4d7c875caf9d28481c8b21.tar.bz2 linux-stable-5f785de588735306ec4d7c875caf9d28481c8b21.zip | |
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')
0 files changed, 0 insertions, 0 deletions