linux-kernel - Re: A desktop environment[1] kernel wishlist

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Message-ID: <20141030232125.78fd1d28@alan.etchedpixels.co.uk>
Date:	Thu, 30 Oct 2014 23:21:25 +0000
From:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
To:	Bastien Nocera <hadess@...ess.net>
Cc:	"Theodore Ts'o" <tytso@....edu>, Pavel Machek <pavel@....cz>,
	Andy Lutomirski <luto@...capital.net>,
	John Stultz <john.stultz@...aro.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: A desktop environment[1] kernel wishlist

> I wouldn't consider this "suspend to RAM", but that's because I expect
> the firmware to implement most of that. Anyway, that's splitting hair.

Quite the reverse in many cases. If your hardware has low power idle you
probably have almost no firmware involved (if any). It's the old world
model of S3 which is all firmware powered.

The extreme case of this is that there are processors out there where
the equivalent of a 'wait for IRQ' instruction is the entire thing.
 
Alan
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