linux-ext4 - [PATCH -v2 0/3] jbd2 scalability patches

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Date:	Wed,  4 Aug 2010 12:39:14 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	Ext4 Developers List <linux-ext4@...r.kernel.org>,
	ocfs2-devel@....oracle.com
Cc:	John Stultz <johnstul@...ibm.com>,
	Keith Maanthey <kmannth@...ibm.com>,
	Eric Whitney <eric.whitney@...com>,
	Theodore Ts'o <tytso@....edu>
Subject: [PATCH -v2 0/3] jbd2 scalability patches

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.

Theodore Ts'o (3):
  jbd2: Use atomic variables to avoid taking t_handle_lock in
    jbd2_journal_stop
  jbd2: Change j_state_lock to be a rwlock_t
  jbd2: Remove t_handle_lock from start_this_handle()

 fs/ext4/inode.c       |    4 +-
 fs/ext4/super.c       |    4 +-
 fs/jbd2/checkpoint.c  |   18 +++---
 fs/jbd2/commit.c      |   42 ++++++------
 fs/jbd2/journal.c     |   94 +++++++++++++--------------
 fs/jbd2/transaction.c |  172 ++++++++++++++++++++++++++++---------------------
 fs/ocfs2/journal.c    |    4 +-
 include/linux/jbd2.h  |   12 ++--
 8 files changed, 188 insertions(+), 162 deletions(-)

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