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

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Date:	Sun, 8 Jul 2007 21:15:26 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Kyle Moffett <mrmacman_g4@....com>,
	Nigel Cunningham <nigel@...el.suspend2.net>,
	Pavel Machek <pavel@....cz>,
	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

On Sunday, 8 July 2007 07:14, Benjamin Herrenschmidt wrote:
[--snip--]
> 
> I just think that the freezer approach, as it is, is backward. We can't
> have a 3rd party try to discriminate what to freeze and what not, it
> will always get something wrong, and in some cases with the wrong timing
> or ordering.

Nice discussion, except for one thing: the freezer doesn't decide what to
freeze.  For example, even right now kernel threads decide if they want to be
frozen.

Greetings,
Rafael


-- 
"Premature optimization is the root of all evil." - Donald Knuth
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