tree b5d6bd99e007c57a6cd4953368202d99a41141cd
parent 09eb47a7c52ad535aafca889e0b936c445c375ce
author Frederic Weisbecker <fweisbec@gmail.com> 1241787232 +0200
committer Frederic Weisbecker <fweisbec@gmail.com> 1252905500 +0200

kill-the-bkl/reiserfs: factorize the locking in reiserfs_write_end()

reiserfs_write_end() is a hot path in reiserfs.
We have two wasteful write lock lock/release inside that can be gathered
without changing the code logic.

This patch factorizes them out in a single protected section, reducing the
number of contentions inside.

[ Impact: reduce lock contention in a reiserfs hotpath ]

Cc: Jeff Mahoney <jeffm@suse.com>
Cc: Chris Mason <chris.mason@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>