linux-kernel - Re: BUG: sleeping function called from invalid context at kernel/mutex.c:271

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Date:	Wed, 18 Apr 2012 21:21:44 +0600
From:	"Alexander E. Patrakov" <patrakov@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	paulmck@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org
Subject: Re: BUG: sleeping function called from invalid context at
 kernel/mutex.c:271

Steven Rostedt wrote:
> On Wed, 2012-04-18 at 19:45 +0600, Alexander E. Patrakov wrote:
> 
> > > Do you see the RT throttling message too? That's a bug with an RT task
> > > going haywire. If that is happening, an RT task may be preventing an RCU
> > > grace period to finish, and causing the RCU stalls.
> > 
> > I am currently at home, writing this from a laptop with 3.3.1, and there
> 
> Have you seen the memory leaks on your laptop?
> 
> > are no such messages in dmesg (yet?). Also I don't know any RT tasks
> > that may run on my computer, except pulseaudio, which has a built-in
> 
> There are kernel threads that run at RT priorities too.
> 
> > safeguard against this. As for the work computer, should I check
> > tomorrow, and with which kernel version?
> > 
> 
> I'm only interested in the kernel version that happens to leak. If other
> versions don't leak then we don't need to worry about them ;-)

Attached is a config and a full dmesg on 3.3.0 on the laptop. No obvious
memory leak - but this may be just the beginning, as the laptop still
responds well enough for me to send this email.

-- 
Alexander E. Patrakov

View attachment "dmesg.txt" of type "text/plain" (101269 bytes)

View attachment "config-3.3.0" of type "text/x-mpsub" (114264 bytes)