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Btrfs: reduce calls to wake_up on uncontended locks
author
Chris Mason
<chris.mason@fusionio.com>
Mon, 23 Jul 2012 19:25:05 +0000
(15:25 -0400)
committer
Chris Mason
<chris.mason@fusionio.com>
Mon, 23 Jul 2012 19:36:18 +0000
(15:36 -0400)
The btrfs locks were unconditionally calling wake_up as the
locks were released. This lead to extra thrashing on the waitqueue,
especially for locks that were dominated by readers.
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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git.openpandora.org / pandora-kernel.git / commitdiff