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xen-devel
Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation
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To: |
Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation |
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From: |
Avi Kivity <avi@xxxxxxxxxx> |
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Date: |
Wed, 07 Oct 2009 23:08:03 +0200 |
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Cc: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, kurt.hackel@xxxxxxxxxx, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Glauber de Oliveira Costa <gcosta@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, zach.brown@xxxxxxxxxx, chris.mason@xxxxxxxxxx |
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Wed, 07 Oct 2009 14:09:51 -0700 |
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<c0b89573-bec7-45dc-b21d-a51f498c2e0c@default> |
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On 10/07/2009 10:48 PM, Dan Magenheimer wrote:
We can support them by falling back to the kernel. I'm a bit worried
about the kernel playing with the hypervisor's version field. It's
better to introduce yet a new version for the kernel, and check both.
On Nehalem, apps that need timestamp information at a high
frequency will likely use rdtsc/rdtscp directly.
Then they will get incorrect timing once they are live migrated.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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- [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, (continued)
- RE: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Dan Magenheimer
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation,
Avi Kivity <=
- RE: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Dan Magenheimer
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Jeremy Fitzhardinge
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Avi Kivity
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Jeremy Fitzhardinge
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Avi Kivity
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Jeremy Fitzhardinge
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Avi Kivity
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Jeremy Fitzhardinge
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Avi Kivity
- Re: [Xen-devel] Re: [PATCH 3/5] x86/pvclock: add vsyscall implementation, Jeremy Fitzhardinge
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