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SubjectRe: [PATCH 0/10] Per-bdi writeback flusher threads v12
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On Thu, 2009-06-25 at 12:41 +0200, Jens Axboe wrote:
> Hi,
>
> Here's the 12th version of the writeback patches. Changes since v11:
>
> - Fixup kthread_run() error check, it should use IS_ERR() instead of
> checking for NULL. Thanks Andrew.
> - Fix a silly buglet that would quickly respawn otherwise idle threads
> once they had exited. This was due to an inverted if test. Didn't cause
> any harm except potentially too many writeback threads setting idle in
> the system.
> - Integrate kupdate periodic writeback with the explicit writeback. Cleans
> that part up.
> - Update to 2.6.31-rc1. With the recent patches from viro and hch, v11
> did not apply cleanly at all to 2.6.31-rc1.
>
> For ease of patching, I've put the full diff here:
>
> http://kernel.dk/writeback-v12.patch
>
> and also stored this in a writeback-v12 branch that will not change,
> you can pull that into Linus tree from here:
>
> git://git.kernel.dk/linux-2.6-block.git writeback-v12
>

> Please test and report results/interesting finds.
I tested it against 2.6.31-rc1 on a couple of machines.
1) System didn't hang;
2) Comapring with previous bdi flusher versions, I didn't find clear performance
different.
> Thanks! The target
> for this patchset is 2.6.32 and it'll be sitting (and has been for the past




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