linux-kernel - Re: 2.6.21 known regressions (v2) (for -stable team)

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Date:	Sat, 28 Apr 2007 20:10:00 +0200
From:	Thomas Meyer <thomas@...3r.de>
To:	tglx@...utronix.de
CC:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	stable@...nel.org, Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Thomas Meyer <thomas.mey@....de>
Subject: Re: 2.6.21 known regressions (v2) (for -stable team)

Thomas Gleixner schrieb:
> On Sat, 2007-04-28 at 18:27 +0200, Michal Piotrowski wrote:
>   
>> Subject    : Bad interaction between dynticks and amarok?
>> References : http://lkml.org/lkml/2007/4/26/307
>> Submitter  : Thomas Meyer <thomas.mey@....de>
>> Status     : Unknow
>>     
>
> Michal,
>
> I don't think this is a regression. What Thomas wanted to point out is,
> that the amarok / sound device is making the positive effect of dynticks
> moot, as it starts to trigger useless interrupts.
>
> Thomas, is my interpretation correct ? Did you check, which interrupt
> was increasing - i.e. was it the soundcard one ?
>   
No, it wasn't the soundcard one. but i had this effect with amarok and
audacious... so, i guessed... which was wrong.

It's the timer interrupt (+50-70 timer interrupts). But i'm not sure
what both applications are doing, while they are "idle"...

with kind regards
thomas

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