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

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Message-ID: <20070708210809.GD5401@elf.ucw.cz>
Date:	Sun, 8 Jul 2007 23:08:09 +0200
From:	Pavel Machek <pavel@....cz>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Kyle Moffett <mrmacman_g4@....com>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	Matthew Garrett <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

Hi!

> > I'm all for changing this infrastructure, but in an organized way (ie. we
> > discuss what to do next, we do that and then we go to the next step) and in
> > the order that everyone will be comfortable with.
> > 
> > So, let's finish this thread and start over from discussing what needs to be
> > done, how (ie. in what order etc.) we are going to do that and who is going to
> > do what.  Shall we?
> 
> IMO we should start by using the new notifier chain and by implementing 
> a central "icebox" routine.  Then we can forbid device registration 
> during suspend.
> 
> It might also be a good idea to add a freezable keventd-like workqueue 
> specifically intended for things that need to block during a suspend.  
> Although maybe this will end up being unnecessary; it's too soon to 
> tell.

We actually had patches for freezeable workqueues at one point.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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