linux-kernel - Re: writeback tree status (for 3.2 merge window)

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Date:	Wed, 2 Nov 2011 23:13:55 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jan Kara <jack@...e.cz>, Curt Wohlgemuth <curtw@...gle.com>,
	Michael Rubin <mrubin@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@....de>,
	Dave Chinner <david@...morbit.com>,
	Greg Thelen <gthelen@...gle.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Andrea Righi <arighi@...eler.com>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Tang Feng <feng.tang@...el.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>, xfs@....sgi.com
Subject: Re: writeback tree status (for 3.2 merge window)

On Wed, Nov 02, 2011 at 05:10:12AM -0400, Christoph Hellwig wrote:
> On Tue, Nov 01, 2011 at 03:43:47PM +0800, Wu Fengguang wrote:
> > Hi,
> > 
> > There are 3 patchsets sitting in the writeback tree.
> > 
> >         1) IO-less dirty throttling v12
> >         https://github.com/fengguang/linux/commits/dirty-throttling-v12
> > 
> >         2) writeback reasons tracing from Curt Wohlgemuth
> >         https://github.com/fengguang/linux/commits/writeback-reason
> > 
> >         3) writeback queuing changes from Jan Kara and me
> >         https://github.com/fengguang/linux/commits/requeue-io-wait
> > 
> > They have been merged into this branch testing in linux-next for a while:
> > 
> > https://github.com/fengguang/linux/commits/writeback-for-next
> > 
> > Since (3) still has an unresolved issue (detailed in the below
> > links), it looks better to hold it back for this merge window.
> 
> Given that we have run into issues so much with it that's proably
> the better idea.
> 
> To fix the originally reported issue with the missing file size updates
> in XFS we plan to simply log all filesize changes in XFS.  Currently I
> had this in the 3.3 queue, but in the worst case we might have to move
> this forward to 3.2.

OK. Anyway I'll report any progress early on (3).

> > The patches from (1,2) together with 2 tracing patches essential for
> > debugging (1) have been pushed to the "writeback-for-linus" branch:
> > 
> >         http://git.kernel.org/?p=linux/kernel/git/wfg/linux.git;a=shortlog;h=refs/heads/writeback-for-linus
> > 
> > If no objections, I'll send a pull request to Linus soon.
> 
> Please do so.  I'm really looking forward to see the I/O-less
> balance_dirty_pages in ASAP.

Done, thanks!

Thanks,
Fengguang
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