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

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Message-ID: <1334756901.28106.38.camel@gandalf.stny.rr.com>
Date:	Wed, 18 Apr 2012 09:48:21 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	"Alexander E. Patrakov" <patrakov@...il.com>
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

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 ;-)

Perhaps the problem has already been fixed in later kernels.

-- Steve

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