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

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Message-ID: <20070711132819.GA5753@srcf.ucam.org>
Date:	Wed, 11 Jul 2007 14:28:20 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Pavel Machek <pavel@....cz>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: sysrq-t dumps of s2ram/fuse deadlock (was Re: [PATCH] Remove process freezer from suspend to RAM pathway)

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.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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