linux-kernel - Re: [linux-pm] [PATCH 1/8] PM: Add suspend block api.

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Message-ID: <20100507173621.GA23604@srcf.ucam.org>
Date:	Fri, 7 May 2010 18:36:21 +0100
From:	Matthew Garrett <mjg@...hat.com>
To:	Daniel Walker <dwalker@...o99.com>
Cc:	Tony Lindgren <tony@...mide.com>,
	Brian Swetland <swetland@...gle.com>,
	Alan Stern <stern@...land.harvard.edu>,
	mark gross <mgross@...ux.intel.com>, markgross@...gnar.org,
	Len Brown <len.brown@...el.com>, linux-doc@...r.kernel.org,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Oleg Nesterov <oleg@...hat.com>, Tejun Heo <tj@...nel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [linux-pm] [PATCH 1/8] PM: Add suspend block api.

On Fri, May 07, 2010 at 10:20:37AM -0700, Daniel Walker wrote:

> MSM doesn't have those power states unfortunately .. Your kind of
> suggesting what I was suggesting in that we should suspend in idle. Your
> hardware can do it easier tho since your have power states that are
> equal to suspend.

If your wakeup latencies are sufficiently low and you have fine-grained 
enough control over your hardware then suspend in idle is a reasonable 
thing to do - but if you have a userspace app that's spinning then 
that doesn't solve the issue.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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