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SubjectRe: merging the per-bdi writeback patchset
On Tue, 23 Jun 2009 10:11:56 +0200 Jens Axboe <> wrote:

> Things are looking good for this patchset and it's been in -next for
> almost a week without any reports of problems. So I'd like to merge it
> for 2.6.31 if at all possible. Any objections?

erk. I was rather expecting I'd have time to have a look at it all.

It's unclear to me actually _why_ the performance changes which were
observed have actually occurred. In fact it's a bit unclear (to me)
why the patchset was written and what it sets out to achieve :(

A long time ago the XFS guys (Dave Chinner iirc) said that XFS needs
more than one thread per device to keep the device saturated. Did that
get addressed?

(kthread_run() returns an ERR_PTR() on error, btw - not NULL.)

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