linux-kernel - Re: [bisected] sys_paccept: disable paccept() causes my macbook pro to have an annoying whining sound

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Message-ID: <20100107160246.GB16076@basil.fritz.box>
Date:	Thu, 7 Jan 2010 17:02:46 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	"Justin P. Mattock" <justinmattock@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-wireless@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [bisected] sys_paccept: disable paccept() causes my macbook
	pro to  have an annoying whining sound

> As for the power management
> I didn't think so.. sounds more
> like vibration of a solder joint/capacitor

Typically those are caused by power management -- cpu going in/out 
sleep states.

You can check by e.g. limiting your CPU to C1 with 
processor.max_cstate=1

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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