xfs_fsr, sunit, and swidth

[Dave Chinner]

On Mon, Apr 15, 2013 at 04:35:38PM -0400, Dave Hall wrote:
> Stan,
> 
> I understand that this will be an ongoing problem.  It seems like
> all I could do at this point would be to ' manually defrag' my
> inodes the hard way by doing this 'copy' operation whenever things
> slow down.  (Either that or go get my PHD in file systems and try to
> come up with a better inode management algorithm.)

No need, I know how to fix it for good. Just add a new btree that
tracks free inodes, rather than having to scan the allocated inode
tree to find free inodes. Shouldn't actually be too difficult to do,
as it's a generic btree and the code to keep both btrees in sync is
a copy of the way the two freespace btrees are kept in sync....

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com