linux-kernel - Re: [Patch] idle governor: Avoid lock acquisition to read pm

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Message-ID: <20110210034656.GA22753@gargoyle.amr.corp.intel.com>
Date:	Wed, 9 Feb 2011 19:46:56 -0800
From:	Andi Kleen <ak@...ux.intel.com>
To:	Tim Chen <tim.c.chen@...ux.intel.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	mark gross <markgross@...gnar.org>,
	James Bottomley <James.Bottomley@...e.de>,
	David Alan Gilbert <linux@...blig.org>,
	linux-kernel@...r.kernel.org, Len <len.brown@...el.com>,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [Patch] idle governor: Avoid lock acquisition to read pm_qos
 before entering idle

> Signed-off-by: Tim Chen <tim.c.chen@...ux.intel.com>

Patch looks good to me. Thanks Tim.

I expect this will also improve other pm-qos users, but of course they
are likely not as frequently used as the idle governour.

(and before anyone makes jokes about optimizing the idle loop: idle 
latency is very important for workloads with lots of wakeups out of
idle)

-Andi
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