linux-kernel - Re: [RFC] sleepy linux

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Message-ID: <4772A3FB.8080108@zytor.com>
Date:	Wed, 26 Dec 2007 10:56:59 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Pavel Machek <pavel@....cz>
CC:	kernel list <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.osdl.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [RFC] sleepy linux

Pavel Machek wrote:
> This is RFC. It does not even work for me... it sleeps but it will not
> wake up, because SATA wakeup code is missing. Code attached for illustration.
> 
> I wonder if this is the right approach? What is right interface to the
> drivers?
> 
> 3) Network card that is either down
>    or can wake up system on any packet (and not loose too many packets)
> 

This is the big crux I see.  You're going to constantly wake up the 
machine due to broadcast packets, and spend a lot of power just going in 
and out of S3.

	-hpa
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