linux-kernel - Re: [PATCH] Fix congestion_wait() sync/async vs read/write confusion

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Date:	Wed, 8 Jul 2009 21:15:21 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-kernel@...r.kernel.org, chris.mason@...cle.com
Subject: Re: [PATCH] Fix congestion_wait() sync/async vs read/write confusion

On Wednesday 08 July 2009, Jens Axboe wrote:
> Hi,
> 
> This one isn't great, we currently have broken congestion wait logic in
> the kernel. 2.6.30 is impacted as well, so this patch should go to
> stable too once it's in -git. I'll let this one simmer until tomorrow,
> then ask Linus to pull it. The offending commit breaking this is
> 1faa16d22877f4839bd433547d770c676d1d964c.
> 
> Meanwhile, it could potentially cause buffered writeout slowdowns in the
> kernel. Perhaps the 2.6.30 regression in that area is caused by this?
> Would be interesting if the submitter could test. I can't find the list,
> CC'ing Rafael.

Thanks, but I'm not sure which one do you mean in particular.
http://bugzilla.kernel.org/show_bug.cgi?id=13408 looks like it might be
somewhat related.

The complete list is at http://lkml.org/lkml/2009/7/6/383 .

Best,
Rafael
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