linux-kernel - Re: kvm: odd time values since "kvmclock: set scheduler clock stable"

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Message-ID: <55536FE1.7040104@oracle.com>
Date:	Wed, 13 May 2015 11:38:09 -0400
From:	Sasha Levin <sasha.levin@...cle.com>
To:	Luiz Capitulino <lcapitulino@...hat.com>
CC:	KVM General <kvm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, mtosatti@...hat.com,
	Paolo Bonzini <pbonzini@...hat.com>
Subject: Re: kvm: odd time values since "kvmclock: set scheduler clock stable"

On 05/13/2015 08:58 AM, Luiz Capitulino wrote:
> On Tue, 12 May 2015 19:17:24 -0400
> Sasha Levin <sasha.levin@...cle.com> wrote:
> 
>> > Hi all,
>> > 
>> > I'm seeing odd jump in time values during boot of a KVM guest:
>> > 
>> > [...]
>> > [    0.000000] tsc: Detected 2260.998 MHz processor
>> > [3376355.247558] Calibrating delay loop (skipped) preset value..
>> > [...]
>> > 
>> > I've bisected it to:
> Thanks for bisecting. You just boot a guest to reproduce this? How
> many vCPUs does the guest have?
> 
> Paolo, I think it's better to drop this patch for now.
> 

Yup, just booting a 32 VCPU guest - it happens very early during boot.


Thanks,
Sasha
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