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To: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
       Andreas Herrmann <andreas.herrmann3@amd.com>,
       =?utf-8?B?Uy7Dh2HEn2xhcg==?= Onur <caglar@pardus.org.tr>,
       Valdis.Kletnieks@vt.edu, Matt Mackall <mpm@selenic.com>,
       linux-kernel@vger.kernel.org
Subject: Re: [BISECTED] Lots of "rescheduling IPIs" in powertop
From: Andi Kleen <andi@firstfloor.org>
References: <20080513204206.GA17781@damson.getinternet.no>
Date: Tue, 13 May 2008 22:54:40 +0200
In-Reply-To: <20080513204206.GA17781@damson.getinternet.no> (Vegard Nossum's message of "Tue, 13 May 2008 22:42:06 +0200")
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Vegard Nossum <vegard.nossum@gmail.com> writes:
>
> This initially showed up on my 2.6.24.5-85.fc8 (Fedora) kernel.
>
> I have two different systems (one laptop, one desktop) which both show the
> same symptoms, please do tell me if you need any more info.

What CPUs do they have?  And does the problem really go away when
you boot with idle=mwait ? And what does the following program 
output? 

#include <asm/msr.h>

main()
{
        printf("%x\n", cpuid_edx(5));
}

-Andi