From: Eric Blake <eblake@redhat.com>
To: Eduardo Habkost <ehabkost@redhat.com>
Cc: kvm@vger.kernel.org, Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel@nongnu.org, Gleb Natapov <gleb@redhat.com>,
Avi Kivity <avi@redhat.com>
Subject: Re: [QEMU 1.1 PATCH v2] Expose CPUID leaf 7 only for -cpu host
Date: Thu, 17 May 2012 10:56:36 -0600 [thread overview]
Message-ID: <4FB52DC4.5040609@redhat.com> (raw)
In-Reply-To: <20120517162655.GQ16951@otherpad.lan.raisama.net>
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On 05/17/2012 10:26 AM, Eduardo Habkost wrote:
> The problem is that this makes the resulting CPU feature flags
> unpredictable and dependent on the host CPU and kernel version. This
> breaks live-migration badly if migrating from a host CPU that supports
> some features on that CPUID leaf (running a recent kenrel) to a kernel
s/kenrel/kernel/
--
Eric Blake eblake@redhat.com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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WARNING: multiple messages have this Message-ID (diff)
From: Eric Blake <eblake@redhat.com>
To: Eduardo Habkost <ehabkost@redhat.com>
Cc: kvm@vger.kernel.org, Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel@nongnu.org, Gleb Natapov <gleb@redhat.com>,
Avi Kivity <avi@redhat.com>
Subject: Re: [Qemu-devel] [QEMU 1.1 PATCH v2] Expose CPUID leaf 7 only for -cpu host
Date: Thu, 17 May 2012 10:56:36 -0600 [thread overview]
Message-ID: <4FB52DC4.5040609@redhat.com> (raw)
In-Reply-To: <20120517162655.GQ16951@otherpad.lan.raisama.net>
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On 05/17/2012 10:26 AM, Eduardo Habkost wrote:
> The problem is that this makes the resulting CPU feature flags
> unpredictable and dependent on the host CPU and kernel version. This
> breaks live-migration badly if migrating from a host CPU that supports
> some features on that CPUID leaf (running a recent kenrel) to a kernel
s/kenrel/kernel/
--
Eric Blake eblake@redhat.com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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next prev parent reply other threads:[~2012-05-17 16:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-17 16:26 [QEMU 1.1 PATCH v2] Expose CPUID leaf 7 only for -cpu host Eduardo Habkost
2012-05-17 16:26 ` [Qemu-devel] " Eduardo Habkost
2012-05-17 16:56 ` Eric Blake [this message]
2012-05-17 16:56 ` Eric Blake
2012-05-17 17:20 ` Eduardo Habkost
2012-05-17 17:20 ` Eduardo Habkost
2012-05-21 14:25 ` Eduardo Habkost
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