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From: Sasha Levin <sasha.levin@oracle.com>
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"
Date: Wed, 13 May 2015 11:38:09 -0400	[thread overview]
Message-ID: <55536FE1.7040104@oracle.com> (raw)
In-Reply-To: <20150513085824.7bd2d788@redhat.com>

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

  reply	other threads:[~2015-05-13 15:38 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-12 23:17 kvm: odd time values since "kvmclock: set scheduler clock stable" Sasha Levin
2015-05-13 12:58 ` Luiz Capitulino
2015-05-13 15:38   ` Sasha Levin [this message]
2015-05-13 17:16   ` Paolo Bonzini
2015-05-18 22:39 ` Marcelo Tosatti
2015-05-18 23:45   ` Sasha Levin
2015-05-19  0:13     ` Marcelo Tosatti
2015-05-19  2:02       ` Sasha Levin
2015-05-19  2:13         ` Sasha Levin
2015-05-22  0:40           ` KVM: x86: zero kvmclock_offset when vcpu0 initializes kvmclock system MSR Marcelo Tosatti
2015-05-22  0:41           ` kvm: odd time values since "kvmclock: set scheduler clock stable" Marcelo Tosatti
2015-05-26 13:21             ` Luiz Capitulino
2015-05-26 13:25               ` Sasha Levin

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