From mboxrd@z Thu Jan  1 00:00:00 1970
From: Glauber Costa <glommer@redhat.com>
Subject: Re: guest gettimeofday behavior
Date: Wed, 8 Jul 2009 08:51:32 -0300
Message-ID: <20090708115132.GV3528@poweredge.glommer>
References: <loom.20090625T130343-552@post.gmane.org> <4A4730B9.1090902@redhat.com> <loom.20090629T182016-191@post.gmane.org> <4A49B6A5.4090801@redhat.com> <loom.20090630T074707-606@post.gmane.org> <loom.20090706T081604-11@post.gmane.org> <loom.20090707T081402-628@post.gmane.org> <20090707201216.GA9129@amt.cnet>
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Cc: Eran Rom <eranr@il.ibm.com>,
	Glauber de Oliveira Costa <gcosta@redhat.com>,
	kvm@vger.kernel.org
To: Marcelo Tosatti <mtosatti@redhat.com>
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On Tue, Jul 07, 2009 at 05:12:16PM -0300, Marcelo Tosatti wrote:
> On Tue, Jul 07, 2009 at 09:58:46AM +0000, Eran Rom wrote:
> > Eran Rom <eranr <at> il.ibm.com> writes:
> > 
> > > 
> > > Eran Rom <eranr <at> il.ibm.com> writes:
> > > 
> > > Still getting a misbehaving clock:
> > > guest uses kvmclock with kernel 2.6.27
> > > host kernel is 2.6.27 with kvm-qemu-87 & kvm-kmod-87
> > > 
> > > getting:
> > > ...
> > > now     =       2128043797
> > > now     =       2138048010
> > > now     =       18446744071562636328
> > > 
> 
> Eran,
> 
> This was happening with kvmclock back then when it did not handle
> cpu frequency changes. What are the details of the host hw?
> 
> Glauber, any clues?
maybe it is exactly that. 2.6.27 is a little bit old, and probably does not
have the fixes.