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

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Date:	Tue, 3 Jul 2007 20:26:34 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org,
	Pavel Machek <pavel@....cz>,
	Nigel Cunningham <nigel@...el.suspend2.net>
Subject: Re: [PATCH] Remove process freezer from suspend to RAM pathway

Am Dienstag, 3. Juli 2007 schrieb Rafael J. Wysocki:
> > > The main reason for deadlocks is because we do a sys_sync() after the
> > > freeze, which we shouldn't do.
> > 
> > So why don't we remove the sys_sync() from freeze_processes() instead?
> 
> The patch follows (untested).

And a further question. The freezer is not atomic. What do you do
if a task not yet frozen calls sys_sync(), but fuse is already frozen?

	Regards
		Oliver
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