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From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Ingo Molnar <mingo@elte.hu>
Subject: Re: [Bug #10640] audio skipping on 2.6.26-rc1
Date: Mon, 12 May 2008 21:29:14 +0200
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Cc: Parag Warudkar <parag.warudkar@gmail.com>, linux-kernel@vger.kernel.org,
       Miklos Szeredi <miklos@szeredi.hu>
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On Monday, 12 of May 2008, Ingo Molnar wrote:
> 
> * Parag Warudkar <parag.warudkar@gmail.com> wrote:
> 
> > Rafael J. Wysocki <rjw <at> sisk.pl> writes:
> > 
> > > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=10640
> > > Subject		: audio skipping on 2.6.26-rc1
> > > Submitter	: Miklos Szeredi <miklos <at> szeredi.hu>
> > > Date		: 2008-05-07 7:56 (5 days old)
> > > References	: http://marc.info/?l=linux-kernel&m=121014707707781&w=2
> > > Handled-By	: Ingo Molnar <mingo <at> elte.hu>
> > 
> > This is a duplicate of [Bug #10616] Horrendous Audio Stutter - current 
> > git .
> 
> that should be resolved via your patch which i pushed upstream (commit 
> v2.6.26-rc1-83-gaac6abc), which marks group scheduling experimental and 
> non-default.
> 
> i think the audio skipping from Miklos, if it does not go away with 
> disabling group scheduling, might also be solved by:
> 
>  - commit v2.6.26-rc1-181-g4615112 ("sched: fix weight calculations") 
>    from Mike.
> 
>  - or by commit v2.6.26-rc1-82-g3e51f33 from Peter ("sched: add optional 
>    support for CONFIG_HAVE_UNSTABLE_SCHED_CLOCK") which makes the 
>    scheduler clock more reliable [and hence produce no artificial 
>    latencies] on NOHZ
> 
>  - or by commit v2.6.26-rc1-66-ga992241 from Peter ("sched: fix 
>    normalized sleeper").

Miklos, can you please verify if the problem is present in 2.6.26-rc2?

Rafael