linux-kernel - Re: [Bug #10616] Horrendous Audio Stutter

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Date:	Sun, 11 May 2008 17:59:21 -0400
From:	"Parag Warudkar" <parag.warudkar@...il.com>
To:	"Adrian Bunk" <bunk@...nel.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Peter Zijlstra" <peterz@...radead.org>,
	"Frans Pop" <elendil@...net.nl>
Subject: Re: [Bug #10616] Horrendous Audio Stutter - current git

On Sun, May 11, 2008 at 5:41 PM, Adrian Bunk <bunk@...nel.org> wrote:
> On Sun, May 11, 2008 at 05:28:47PM -0400, Parag Warudkar wrote:
>> On Sun, May 11, 2008 at 4:04 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
>> > This message has been generated automatically as a part of a report
>> > of recent regressions.
>> >
>> > The following bug entry is on the current list of known regressions
>> > from 2.6.25.  Please verify if it still should be listed.
>> >
>> >
>> > Bug-Entry       : http://bugzilla.kernel.org/show_bug.cgi?id=10616
>> > Subject         : Horrendous Audio Stutter - current git
>>
>> Still present both in Linus tree and sched-devel - root cause is not
>> yet well understood per Ingo.
>>
>> Worked around by disabling GROUP_SCHED stuff by default (commit
>> aac6abca858386438d9a7233c3471d2ecfa2f704 ).
>
> What causes this regression?

GROUP_SCHED stuff.

>
> Is this commit 018d6db4cb5bbdcd65424a16f2dcca692ed32ae4
> (sched: re-do "sched: fix fair sleepers") that had already been reverted
> in 2.6.25 for causing such regressions or is this caused by a different
> commit?

Both current -git and sched-devel have this problem - that means it's
unrelated to the commit you refer to unless it was reintroduced in a
different form but same effect.

Parag
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