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From: "Richard W.M. Jones" <rjones@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ian Pilcher <arequipeno@gmail.com>,
	virt@lists.fedoraproject.org, kvm@vger.kernel.org
Subject: Re: [fedora-virt] 3.13 - Nested KVM (vmx) totally broken?
Date: Thu, 6 Mar 2014 21:59:09 +0000	[thread overview]
Message-ID: <20140306215909.GA17303@redhat.com> (raw)
In-Reply-To: <53158B34.3050909@redhat.com>

On Tue, Mar 04, 2014 at 09:13:40AM +0100, Paolo Bonzini wrote:
> Il 04/03/2014 03:40, Ian Pilcher ha scritto:
> >Is this a known problem?  I just tried using nested vmx for the first
> >time since upgrading my system from F19 (3.12.?? at the time) to F20,
> >and I cannot start any L2 guests.  The L2 guest appears to hang almost
> >immediately after starting, consuming 100% of one of the L1 guest's
> >VCPUs.
> >
> >If I reboot with kernel-3.12.10-300.fc20.x86_64, the problem does not
> >occur.
> >
> >Any known workaround?  (Other than using 3.12.10?)
> 
> There is a fix on the way to the 3.13 kernel.
> 
> You can open a Fedora bug and ask them to include
> http://article.gmane.org/gmane.linux.kernel.stable/82043/raw in the
> kernel.

Thanks for fixing this.  It affects a lot of libguestfs users too.

I opened this bug:

https://bugzilla.redhat.com/show_bug.cgi?id=1073663

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
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  parent reply	other threads:[~2014-03-06 21:59 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-04  2:40 [fedora-virt] 3.13 - Nested KVM (vmx) totally broken? Ian Pilcher
2014-03-04  8:13 ` Paolo Bonzini
2014-03-04  9:30   ` Kashyap Chamarthy
2014-03-04  9:38     ` Kashyap Chamarthy
2014-03-04 17:45     ` Ian Pilcher
2014-03-06 21:59   ` Richard W.M. Jones [this message]
2014-03-14 11:52     ` Vasiliy Tolstov
2014-03-14 11:58       ` Richard W.M. Jones
2014-03-14 12:11         ` Vasiliy Tolstov
2014-03-14 12:16           ` Richard W.M. Jones
2014-03-14 12:39             ` Vasiliy Tolstov
2014-03-14 12:43               ` Richard W.M. Jones

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