Re: sysrq-t dumps of s2ram/fuse deadlock (was Re: [PATCH] Remove process freezer from suspend to RAM pathway)

Pavel Machek
2007-07-12T09:17:14Z

On Wed 2007-07-11 14:28:20, Matthew Garrett wrote:
> On Mon, Jul 09, 2007 at 01:29:05PM +0000, Pavel Machek wrote:
> > Hi!
> >
> > Can we get them? They are neccessary for debugging 'what in suspend
> > calls fuse' problem. And yes, that problem is there even when you
> > remove freezer.
>
> I can produce them, but haven't managed to do that in any way that lets
> me get them off the system yet.
>
> > Matthew, you seem to be the only one able to produce them...
>
> sys_sync may not do anything on a fuse filesystem, but if you've
> loopback-mounted an ext3 filesystem from that fuse filesystem then it's
> going to result in writes to it and deadlock.

Aha, yes, that explains the problem. Thanks!
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html