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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/