[PATCH 08/27] xfs: improve sync behaviour in the fact of aggressive dirtying

[Christoph Hellwig]

On Tue, Jul 05, 2011 at 05:36:18PM -0500, Alex Elder wrote:
> > A large part of the issue is that XFS writes data out itself two times
> > in the ->sync_fs method, overriding the lifelock protection in the core
> > writeback code, and another issue is the lock-less xfs_ioend_wait call,
> > which doesn't prevent new ioend from beeing queue up while waiting for
> > the count to reach zero.
> 
> The change affects only the first thing you mention here, not
> the second.

It does.  We're also removing the xfs_ioend_wait done from
xfs_sync_data/xfs_sync_inode_data.  We still have another one in
->write_inode, though.

> The i_iocount wait is not affected by your patch.

We're only removing one of the two we're doing per inode now.

> I'm OK with the change, but really prefer to have
> the description not include stuff that just isn't
> there.  If you want me to commit this as-is, just
> say so and I will.  Otherwise, post an update and
> I'll use that.  In any case, you can consider this
> reviewed by me.

If you have an idea how to reword the description send it my way.