linux-kernel - Re: v2.6.21.5-rt19 (sched

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Message-Id: <1184702217.21931.19.camel@cmn3.stanford.edu>
Date:	Tue, 17 Jul 2007 12:56:57 -0700
From:	Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	nando@...ma.Stanford.EDU, Gabriel C <nix.or.die@...glemail.com>,
	Carsten Emde <carsten.emde@...dl.org>,
	"jcaceres@...ma.Stanford.EDU" <jcaceres@...ma.Stanford.EDU>,
	Steven Rostedt <rostedt@...dmis.org>,
	RT-Users <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Rui Nuno Capela <rncbc@...bc.org>
Subject: Re: v2.6.21.5-rt19 (sched_getaffinity?)

On Tue, 2007-07-17 at 21:32 +0200, Ingo Molnar wrote:
> * Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU> wrote:
> 
> > I do get flash 9 (I know, not the best example) and tomboy to hang as 
> > reported by one of my Planet CCRMA users - flash 9 tested working on 
> > stock fedora 7 kernel - and both seem to hang in the same system call:
> > 
> > sched_getaffinity(3528, 32, <unfinished ...>
> > 
> > Full output of strace attached for both cases.
> 
> hm, that's weird. Is it completely unkillable at that time? Could you do 
> a few things: enable CONFIG_PROVE_LOCKING (lockdep), and also try to get 
> a full task state dump via:
> 
>   echo t > /proc/sysrq-trigger

Trace attached... the process stays in D state no matter what. 
-- Fernando


Download attachment "trace1.txt.gz" of type "application/x-gzip" (21335 bytes)