linux-kernel - Re: 2.6.21-rc4-mm1

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Message-ID: <20070320183821.GD2670@elf.ucw.cz>
Date:	Tue, 20 Mar 2007 19:38:21 +0100
From:	Pavel Machek <pavel@....cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jiri Slaby <jirislaby@...il.com>, linux-kernel@...r.kernel.org,
	linux-pm@...ts.osdl.org, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: 2.6.21-rc4-mm1

Hi!

> > 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?

Is it repeatable? Freezer normally works better than that.

> 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.  

echo testproc > /sys/power/disk; echo disk > /sys/power/state ... is
pretty much what you want.
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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