From: Dave Chinner <david@fromorbit.com>
To: xfs@oss.sgi.com
Cc: paulmck@linux.vnet.ibm.com, eric.dumazet@gmail.com
Subject: [PATCH 0/2] xfs: RCU inode freeing and lookups V3
Date: Mon, 13 Dec 2010 12:32:34 +1100 [thread overview]
Message-ID: <1292203957-15819-1-git-send-email-david@fromorbit.com> (raw)
This series converts the XFS inode cache to use RCU freeing
for freeing of the inodes and uses RCU locking for all the lookups.
It uses the ip->i_ino values and ip->i_flags & XFS_IRECLAIM being
checked under the ip->i_flags_lock to detect inodes that have been
freed during lookups.
Version 3:
- add patch for specific RCU freeing of inodes rather than relying
on an external tree to provide RCU freeing functionality. This
uses standard RCU freeing mechanisms rather than
SLAB_DESTROY_BY_RCU. This is kept as a separate patch to minimise
the merge conflict issues that may arise if the change is made
through VFS code first.
- Drop specific references to SLAB_DESTROY_BY_RCU, but keep all the
lookup guards for reclaimed/reused inodes as they are mostly the
same for both methods of RCU inode freeing.
Version 2:
- check ip->i_ino under i_flags lock on cache hit
- remove duplicate ip->i_ino == 0 check in xfs_dqrele_inode
- Fixed inode cluster walks to check for valid i_ino under
i_flags_lock.
- Fixed ag walk lookups to check i_ino under i_flags_lock.
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next reply other threads:[~2010-12-13 1:33 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-13 1:32 Dave Chinner [this message]
2010-12-13 1:32 ` [PATCH 1/3] xfs: rcu free inodes Dave Chinner
2010-12-14 20:23 ` Paul E. McKenney
2010-12-13 1:32 ` [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Dave Chinner
2010-12-14 21:18 ` Paul E. McKenney
2010-12-14 23:00 ` Dave Chinner
2010-12-15 1:05 ` Paul E. McKenney
2010-12-15 2:50 ` Dave Chinner
2010-12-15 6:34 ` Paul E. McKenney
2010-12-15 3:30 ` Nick Piggin
2010-12-15 6:35 ` Dave Chinner
2010-12-15 8:05 ` Nick Piggin
2010-12-13 1:32 ` [PATCH 3/3] xfs: convert pag_ici_lock to a spin lock Dave Chinner
2010-12-14 21:19 ` Paul E. McKenney
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