linux-kernel - Re: [linux-pm] [PATCH] - race-free suspend. Was: Re: [PATCH 0/8] Suspend block api (version 8)

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Date:	Wed, 2 Jun 2010 23:12:39 -0700
From:	Brian Swetland <swetland@...gle.com>
To:	markgross@...gnar.org
Cc:	Neil Brown <neilb@...e.de>, Peter Zijlstra <peterz@...radead.org>,
	"Paul@...p1.linux-foundation.org" <Paul@...p1.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Florian Mickler <florian@...kler.org>,
	James Bottomley <James.Bottomley@...e.de>,
	Linux PM <linux-pm@...ts.linux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Felipe Balbi <felipe.balbi@...ia.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [linux-pm] [PATCH] - race-free suspend. Was: Re: [PATCH 0/8] 
	Suspend block api (version 8)

On Wed, Jun 2, 2010 at 11:04 PM, mark gross <640e9920@...il.com> wrote:
>>
>> There are many wakeup events possible in a typical system --
>> keypresses or other input events, network traffic, telephony events,
>> media events (fill audio buffer, fill video decoder buffer, etc), and
>> I think requiring that all wakeup event processing bottleneck through
>> a single userspace process is non-optimal here.
>
> Um doesn't the android framework bottleneck the user mode lock
> processing through the powermanager and any wake up event processing
> eventually has to grab a lock through this bottleneck anyway?

For "high level" framework/application level wakelocks, yes, but lower
level components beneath the java api layer use the kernel interface
directly.

Brian
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