Message-ID: <476936E2.9010902@qumranet.com>
Date: Wed, 19 Dec 2007 17:21:06 +0200
From: Avi Kivity <avi@qumranet.com>
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To: Ingo Molnar <mingo@elte.hu>
CC: kvm-devel <kvm-devel@lists.sourceforge.net>,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [kvm-devel] Guest kernel hangs in smp kvm for older kernels	prior
 to tsc sync cleanup
References: <47680173.6060606@qumranet.com> <20071218221930.GA26109@elte.hu> <4768BB43.1000609@qumranet.com> <4768FE27.7020305@qumranet.com> <47690304.1090903@qumranet.com> <20071219140624.GF21282@elte.hu> <47693054.20501@qumranet.com> <20071219150938.GA15267@elte.hu>
In-Reply-To: <20071219150938.GA15267@elte.hu>
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Ingo Molnar wrote:
> try this test perhaps in an SMP guest:
>
>  http://people.redhat.com/mingo/time-warp-test/time-warp-test.c
>
> you can ignore TSC warps - but no GTOD or CLOCK warps should occur.
>
>   

On a broken guest kernel, I see gtod and clock warps.  On a good guest 
kernel, I do not, presumably because the tsc clocksource is marked as 
unstable.

I see tsc warps on both.  8 threads on 4 cpus.

-- 
error compiling committee.c: too many arguments to function

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