On 2010-06-17 08:54, Christoph Hellwig wrote: > > A barrier request should by defintion have priority in get_request > and let the queue be unplugged immediately as it's blocking all forward > progress due to the queue draining. > > Most filesystems already get this implicitly by the way how submit_bh > treats the buffer_ordered flag, and gfs2 sets it explicitly. But btrfs > and XFS are still forgetting to set the flag, as is blkdev_issue_flush > and some places in DM/MD. > > For XFS on metadata heavy workloads this gives a consistent speedup > in the 2-3% range. Thanks Christoph, applied. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
