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

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Message-Id: <E1I5cE7-0003E4-00@dorka.pomaz.szeredi.hu>
Date:	Tue, 03 Jul 2007 08:51:07 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	oliver@...kum.org
CC:	mjg59@...f.ucam.org, linux-kernel@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org
Subject: Re: [PATCH] Remove process freezer from suspend to RAM pathway

> > 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.
> 
> Only if you want to audit all character devices' read() and write()
> methods for races against suspend().
> / on fuse is a bad idea.

What makes / special?  Why aren't all fuse filesystems affected?
Suspend isn't trying to do I/O on the root fs, is it?

Miklos
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