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(parent: b719f43) | patch
jbd: don't wake kjournald unnecessarily
authorEric Sandeen <sandeen@redhat.com>
Tue, 18 Dec 2012 17:03:57 +0000 (11:03 -0600)
committerJan Kara <jack@suse.cz>
Mon, 14 Jan 2013 21:50:45 +0000 (22:50 +0100)
commit7e2fb2d7e6a3094473f101ae33dd6431ae6d2ed1
tree1550cc5840d8a4323fe5f6357da227436cd542ectree | snapshot
parentb719f43059903820c31edb30f4663a2818836e7fcommit | diff
jbd: don't wake kjournald unnecessarily

Don't send an extra wakeup to kjournald in the case where we
already have the proper target in j_commit_request, i.e. that
commit has already been requested for commit.

commit d9b0193 "jbd: fix fsync() tid wraparound bug" changed
the logic leading to a wakeup, but it caused some extra wakeups
which were found to lead to a measurable performance regression.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
fs/jbd/journal.c diff | blob | history
Domain: System / Kernel;