[PATCH v4 00/20] xfsprogs: introduce the free inode btree

[Dave Chinner]

On Wed, May 07, 2014 at 08:21:39AM -0400, Brian Foster wrote:
> Hi all,
> 
> Here's v4 of the finobt series for xfsprogs. Patches 1-10 are unchanged
> as they are based on the corresponding kernel patches, which have now
> been merged.
> 
> v4 includes some fairly isolated fixes for mkfs and repair based on
> review feedback for v3:
> 
> 	http://oss.sgi.com/archives/xfs/2014-04/msg00239.html
> 
> Some concern was raised over xfs_repair performance based on the
> implementation of patch 17 in v3, so I have run a few repair tests on
> largish filesystems. Tests involved creating a large number of inodes on
> a 1TB 4xraid0, freeing a random percentage to populate the finobt and
> running xfs_repair (e.g., no actual corruptions). xfs_repair was run
> normally (with these patches) and with a change to skip the finobt
> processing via an xfs_sb_version_hasfinobt() hack. The tests were run on
> a 16xcpu, 32GB RAM server.

I still have some concerns about this simply based on the algorithm
and that it will come back an bite us eventually, but for the moment
I think you've done enough to show that it's not going to an
immediate issue.

I haven't seen anything else that needs fixing or causes problems,
so I'm going to merge it for 3.2.1.

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com