tree 88b856432dbc7fd574e896b3c2abe9ed668331f2
parent f5d5ee3686ab928549370e4e584a2c32ef708a37
author Christoph Hellwig <hch@infradead.org> 1318947797 -0400
committer Greg Kroah-Hartman <gregkh@suse.de> 1319519416 +0200

xfs: do not update xa_last_pushed_lsn for locked items

commit bc6e588a8971aa74c02e42db4d6e0248679f3738 upstream

If an item was locked we should not update xa_last_pushed_lsn and thus skip
it when restarting the AIL scan as we need to be able to lock and write it
out as soon as possible.  Otherwise heavy lock contention might starve AIL
pushing too easily, especially given the larger backoff once we moved
xa_last_pushed_lsn all the way to the target lsn.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Stefan Priebe <s.priebe@profihost.ag>
Tested-by: Stefan Priebe <s.priebe@profihost.ag>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>