From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S965490AbbEMPiZ (ORCPT <rfc822;w@1wt.eu>);
	Wed, 13 May 2015 11:38:25 -0400
Received: from aserp1040.oracle.com ([141.146.126.69]:21961 "EHLO
	aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S965087AbbEMPiX (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Wed, 13 May 2015 11:38:23 -0400
Message-ID: <55536FE1.7040104@oracle.com>
Date: Wed, 13 May 2015 11:38:09 -0400
From: Sasha Levin <sasha.levin@oracle.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0
MIME-Version: 1.0
To: Luiz Capitulino <lcapitulino@redhat.com>
CC: KVM General <kvm@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>,
        mtosatti@redhat.com, Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: kvm: odd time values since "kvmclock: set scheduler clock stable"
References: <55528A04.2060404@oracle.com> <20150513085824.7bd2d788@redhat.com>
In-Reply-To: <20150513085824.7bd2d788@redhat.com>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
X-Source-IP: aserv0021.oracle.com [141.146.126.233]
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On 05/13/2015 08:58 AM, Luiz Capitulino wrote:
> On Tue, 12 May 2015 19:17:24 -0400
> Sasha Levin <sasha.levin@oracle.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