linux-kernel - Re: [PATCH] Remove process freezer from suspend to RAM pathway

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Message-Id: <1183441887.10386.77.camel@localhost.localdomain>
Date:	Tue, 03 Jul 2007 15:51:27 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Subject: Re: [PATCH] Remove process freezer from suspend to RAM pathway

On Tue, 2007-07-03 at 05:29 +0100, Matthew Garrett wrote:
> Suspend to RAM on a machine with / on a fuse filesystem turns out to be 
> a screaming nightmare - either the suspend fails because syslog (for 
> instance) can't be frozen, or the machine deadlocks for some other 
> reason I haven't tracked down. We could "fix" fuse, or alternatively we 
> could do what we do for suspend to RAM on other platforms (PPC and APM) 
> and just not use the freezer.

The main reason for deadlocks is because we do a sys_sync() after the
freeze, which we shouldn't do.

Ben.


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