From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yong Zhang <yong.zhang0@gmail.com>
Subject: Re: Player Thread is not woken after period elapsed
Date: Fri, 9 Sep 2011 14:07:25 +0800
Message-ID: <20110909060725.GA21124@zhy>
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To: "Nallasellan, Singaravelan" <singaravelan.nallasellan@intel.com>
Cc: Arjan van de Ven <arjan@infradead.org>, "alsa-devel@alsa-project.org" <alsa-devel@alsa-project.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
List-Id: alsa-devel@alsa-project.org

On Thu, Sep 08, 2011 at 03:15:38PM +0530, Nallasellan, Singaravelan wro=
te:
> > > > Further investigation of this issue shows that the thread is in=
 running state

Hmm, how do you detect it?

> > and it is not scheduled. I am not sure how I will go about debuggin=
g this issue.
> > Any pointer would help.

Could 'cat /proc/sched_debug' give some useful info?

And BTW, have you tried CONFIG_DETECT_SOFTLOCKUP =3D y?

Thanks,
Yong


> > >
> > > Could you confirm if [commit f26f9af Sched: fix skip_clock_update
> > > optimization] residents in your kernel?
> I applied this patch manually. I still see the issue.
> >=20
> > And commit da7a735e51f9622eb3e1672594d4a41da01d7e4f
> > http://marc.info/?l=3Dlinux-kernel&m=3D129527509622696&w=3D2
> This is already applied.
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=BD=EF=BF=BD=EF=BF=BD=EF=BF=BDi=EF=BF=BDaxP=10j=EF=BF=BDm=EF=BF=BD=EF=BF=
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--=20
Only stand for myself