linux-kernel - Re: [PATCH 0/8] device async action mechanism

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Message-ID: <20090715002916.GC2360@ucw.cz>
Date:	Wed, 15 Jul 2009 02:29:16 +0200
From:	Pavel Machek <pavel@....cz>
To:	Zhang Rui <rui.zhang@...el.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-pm <linux-pm@...ts.linux-foundation.org>,
	linux-acpi <linux-acpi@...r.kernel.org>,
	Len Brown <lenb@...nel.org>, "Rafael J. Wysocki" <rjw@...k.pl>,
	"Van De Ven, Arjan" <arjan.van.de.ven@...el.com>
Subject: Re: [PATCH 0/8] device async action mechanism

Hi!

I notice you are still ccing my @suse.cz address. That one no longer
works :-(. 

> this is the patch set I made to speed up the device
> suspend/resume/shutdown process.
> 
> A new mechanism called Device Async Actions is introduced in this patch set.
> The basic idea is that,
> 1. device declares to support certain kinds of device async action,
>    like suspend, resume, shutdown, etc.
> 2. a async domain is create for this device
> 3. the child device inherits the async domain
> 4. devices in the same domain suspend/resume/shutdown asynchronously with
>    the other devices.
> 
> Currently, in order to make sure that it won't bring any side effects,
> I only convert the ACPI battery and i8042 to use this framework, which reduces
> 0.5s+ S3 time(suspend time plus resume time)???, from 7.0s to less than 6.5s.
> and about 0.5s shutdown time in my test.

Hmm, 7seconds is still quite long. What hw is that?

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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