[Ocfs2-devel] [PATCH -v2 0/3] jbd2 scalability patches

[Joel Becker]

On Wed, Aug 04, 2010 at 12:39:14PM -0400, Theodore Ts'o wrote:
> This version fixes three bugs in the 2nd patch of this series that
> caused kernel BUG when the system was under race.  We weren't accounting
> with t_oustanding_credits correctly, and there were race conditions
> caused by the fact the I had overlooked the fact that
> __jbd2_log_wait_for_space() and jbd2_get_transaction() requires
> j_state_lock to be write locked.
> 

Here's an initial set of runs.  Not the fastest disk ever, but it shows
the patches don't hurt us.

http://oss.oracle.com/~mmatsuna/ocfs2-test/FFSB/FFSB.html

Joel

-- 

"I inject pure kryptonite into my brain.
 It improves my kung fu, and it eases the pain."


Joel Becker
Consulting Software Developer
Oracle
E-mail: joel.becker at oracle.com
Phone: (650) 506-8127