writeback tree status (for 3.2 merge window)

Wu Fengguang

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Nov 1, 2011, 3:50:02 AM11/1/11

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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.

http://permalink.gmane.org/gmane.linux.kernel/1206315
http://permalink.gmane.org/gmane.linux.kernel/1206316

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.

Thanks,
Fengguang
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Christoph Hellwig

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Nov 2, 2011, 5:20:02 AM11/2/11

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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.

> 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.

Wu Fengguang

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Nov 2, 2011, 11:20:03 AM11/2/11

to

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