linux-kernel - Re: malicious filesystems (was Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway)

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Date:	Mon, 09 Jul 2007 11:40:19 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	oliver@...kum.org
CC:	miklos@...redi.hu, rjw@...k.pl, pavel@....cz, paulus@...ba.org,
	stern@...land.harvard.edu, johannes@...solutions.net,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	mjg59@...f.ucam.org, benh@...nel.crashing.org,
	nigel@...el.suspend2.net
Subject: Re: malicious filesystems (was Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway)

> > In that case the "we need suspend to be invisible to userspace" as a
> > reason to use the freezer would also be moot, since if you don't
> > schedule userspace after offlining the CPUs, it can't notice this.
> 
> After? Can you do the offlining atomically?

Don't know.  Wait for all CPUs to reach a scheduling point and then
take them offline?  Doesn't sound too difficult.

Miklos
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