Message-ID: <4A5F2EEC.8010508@linux.intel.com>
Date: Thu, 16 Jul 2009 06:45:16 -0700
From: Arjan van de Ven <arjan@linux.intel.com>
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To: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
CC: Zhang Rui <rui.zhang@intel.com>, Andi Kleen <andi@firstfloor.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       linux-pm <linux-pm@lists.linux-foundation.org>,
       linux-acpi <linux-acpi@vger.kernel.org>, Len Brown <lenb@kernel.org>
Subject: Re: [PATCH 0/8] device async action mechanism
References: <1247643512.26272.74.camel@rzhang-dt> <87ocrm6xeq.fsf@basil.nowhere.org> <1247710483.26272.170.camel@rzhang-dt> <20090716114020.GA11928@khazad-dum.debian.net>
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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....
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