linux-kernel - Re: [RFC][PATCH -mm] PM: Do not sync filesystems from within the freezer

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Message-Id: <E1I6i0N-0003CY-00@dorka.pomaz.szeredi.hu>
Date:	Fri, 06 Jul 2007 09:13:27 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	nigel@...pend2.net
CC:	rjw@...k.pl, pavel@....cz, linux-pm@...ts.linux-foundation.org,
	nigel@...pend2.net, benh@...nel.crashing.org,
	linux-kernel@...r.kernel.org, mjg59@...f.ucam.org,
	oliver@...kum.org, paulus@...ba.org, miklos@...redi.hu,
	mingo@...e.hu
Subject: Re: [RFC][PATCH -mm] PM: Do not sync filesystems from within the freezer

> To get more serious and practical though, I think the solution is to
> fuzz the userspace/kernelspace distinction. What we really want to
> do is freeze things that submit I/O, then sync, then freeze anything
> that processes I/O and needs to be frozen. In effect, redefine fuse
> processes as freezeable kernel threads.

Another myth, that has been debunked already.  The problem is: how do
you define fuse processes?  There's no theoretical or even practial
way to do that.

Miklos
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