linux-kernel - Re: pm-hibernate : possible circular locking dependency detected

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Message-Id: <200904071356.29914.rusty@rustcorp.com.au>
Date:	Tue, 7 Apr 2009 13:56:28 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ming Lei <tom.leiming@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Linux-pm mailing list" <linux-pm@...ts.linux-foundation.org>,
	Linux Kernel List <linux-kernel@...r.kernel.org>,
	Gautham R Shenoy <ego@...ibm.com>
Subject: Re: pm-hibernate : possible circular locking dependency detected

On Sunday 05 April 2009 23:14:54 Ingo Molnar wrote:
> 
> * Rafael J. Wysocki <rjw@...k.pl> wrote:
> 
> > On Sunday 05 April 2009, Ming Lei wrote:
> > > kernel version : one simple usb-serial patch against  commit
> > > 6bb597507f9839b13498781e481f5458aea33620.
> > > 
> > > Thanks.
> > 
> > Hmm, CPU hotplug again, it seems.
> > 
> > I'm not sure who's the maintainer at the moment.  Andrew, is that 
> > Gautham?
> 
> CPU hotplug tends to land on the scheduler people's desk normally.
> 
> But i'm not sure that's the real thing here - key appears to be this 
> work_on_cpu() worklet by the cpufreq code:

Looks like this will be fixed by Andrew's work-on-cpu-in-own-thread
patch which I just put out the pull request for.

Cheers,
Rusty.
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