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

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Date:	Thu, 16 Jul 2009 16:36:17 +0200
From:	Fabio Comolli <fabio.comolli@...il.com>
To:	Arjan van de Ven <arjan@...ux.intel.com>
Cc:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Zhang Rui <rui.zhang@...el.com>,
	Andi Kleen <andi@...stfloor.org>,
	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>
Subject: Re: [PATCH 0/8] device async action mechanism

On Thu, Jul 16, 2009 at 3:45 PM, Arjan van de Ven<arjan@...ux.intel.com> wrote:
> Henrique de Moraes Holschuh wrote:
>>
>> On Thu, 16 Jul 2009, Zhang Rui wrote:
>>>
>>> the kernel device suspend time is reduced from 3.2s to 2.8s after
>>> applying this patch set in my test box.
>>
>> It will give even a bigger boot time saving on ThinkPads, where there is a
>> Synaptics (or ALPS if you are unlucky) touchpad with the trackpoint behind
>> it... it takes about 2s to init both devices here.  That's two seconds of
>> boot time you can shove off if it is being initialized assyncronously :-)
>>
>
> that's a different problem that I don't think this will solve; as long
> as you keep the boot of the kernel wait for all async actions, you're going
> to hit that wait. In Moblin we have a (bad) patch to not do the wait,
> at some point we need to figure how to get a mainline-able patch....
> --

Is it possible for you to post that patch (or point to a website hosting it)?



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