linux-kernel - Re: 2.6.21-rc4-mm1

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Message-Id: <20070320080944.9cb3c765.akpm@linux-foundation.org>
Date:	Tue, 20 Mar 2007 08:09:44 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	linux-kernel@...r.kernel.org, pavel@...e.cz,
	linux-pm@...ts.osdl.org, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: 2.6.21-rc4-mm1

On Tue, 20 Mar 2007 15:31:02 +0100 Jiri Slaby <jirislaby@...il.com> wrote:

> Andrew Morton napsal(a):
> >   http://userweb.kernel.org/~akpm/2.6.21-rc4-mm1/
> 
> I'm getting this while trying to swsusp:
> Stopping tasks ...
> Stopping kernel threads timed out after 20 seconds (1 tasks refusing to freeze):
>  swapper
>  Restarting tasks ... done.
> 
> What to test? Enable PM_DEBUG?

hm, OK.  Rafael has been working on fixing the process freezer and it'll
take some time to get it to where we want it to be, I expect.

Rafael, I think that we could afford to add heaps of debug in there at this
stage to help us track down problems like this.

Also, it might be useful to add a temporary /proc/freeze-unfreeze thing
which will simply do a freeze/unfreeze cycle.  Then we can apply various
workloads to the machine while madly stressing the freezer code.  
-
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