From: Theodore Ts'o <tytso@mit.edu>
Date: Sun, 9 Mar 2014 00:11:36 +0000 (-0500)
Subject: jbd2: don't hold j_state_lock while calling wake_up()
X-Git-Tag: v3.15-rc1~91^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3469a32a1e948c54204b5dd6f7476a7d11349e9e;p=pandora-kernel.git

jbd2: don't hold j_state_lock while calling wake_up()

The j_state_lock is one of the hottest locks in the jbd2 layer and
thus one of its scalability bottlenecks.

We don't need to be holding the j_state_lock while we are calling
wake_up(&journal->j_wait_commit), so release the lock a little bit
earlier.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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