linux-kernel - Re: [RFC][PATCH -mm 1/3] PM: Hibernation and suspend notifiers

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Date:	Thu, 31 May 2007 07:42:20 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@....cz>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	Oliver Neukum <oliver@...kum.org>
Subject: Re: [RFC][PATCH -mm 1/3] PM: Hibernation and suspend notifiers

On Thursday, 31 May 2007 00:29, Pavel Machek wrote:
> Hi!
> 
> > > I think the rule should be: If you need to do something _before_ tasks are
> > > frozen, do it in PM_PRE_FREEZE, but if you can do that after the tasks have
> > > been frozen, do it on PM_HIBERNATION_PREPARE (or PM_SUSPEND_PREPARE in the
> > > suspend case).
> > 
> > OTOH, having considered it for a while, I think that for now I can add just
> > PM_PRE_FREEZE and PM_POST_THAW, as I don't have any user for the other ones.
> > The other events may be added in the future if need be (along with some users).
> > 
> > I'll post revised patches in a new thread.
> 
> Yes please.
> 
> (Hmm, but you may create 4 of them PM_PRE_HIBERNATION, PM_PRE_SUSPEND,
> PM_POST_HIBERNATION, PM_POST_SUSPEND -- I'd call all of them before
> freeze and after thaw, but if we drop freezer for suspend, we won't
> have to rename anything.)

Yes, that's a good idea. :-)

Greetings,
Rafael
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