linux-kernel - Re: [linux-pm] Re: Hibernation considerations

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Message-Id: <E1ICyTB-00056Q-00@dorka.pomaz.szeredi.hu>
Date:	Mon, 23 Jul 2007 16:01:05 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	rjw@...k.pl
CC:	miklos@...redi.hu, stern@...land.harvard.edu, oliver@...kum.org,
	nigel@...el.suspend2.net, nigel@...pend2.net, jbms@....edu,
	miltonm@....com, ying.huang@...el.com,
	linux-kernel@...r.kernel.org, david@...g.hm,
	linux-pm@...ts.linux-foundation.org
Subject: Re: [linux-pm] Re: Hibernation considerations

> Alan has recently proposed to introduce "suspend locks" to be acquired during
> a suspend/hibernation and such that we can leave uninterruptible tasks that
> don't hold any of them.

Sounds sane.  A global rwsem could be acquired for read by drivers,
and for write by suspend/hibernate.  Just need to add it to all
drivers that have PM, but that shouldn't need a heroic effort.

Miklos
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