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xen-devel
[Xen-devel] Re: [GIT PULL RFC] pvclock cleanups and pvclock vsyscall sup
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To: |
Avi Kivity <avi@xxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [GIT PULL RFC] pvclock cleanups and pvclock vsyscall support |
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From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Sun, 18 Oct 2009 17:18:16 +0900 |
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Cc: |
Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, kurt.hackel@xxxxxxxxxx, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Glauber de Oliveira Costa <gcosta@xxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Chris Mason <chris.mason@xxxxxxxxxx> |
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Sun, 18 Oct 2009 01:19:21 -0700 |
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On 10/18/09 15:43, Avi Kivity wrote:
> On 10/16/2009 04:46 AM, Jeremy Fitzhardinge wrote:
>> Care to cook up a patch to implement the kvm bits to make sure it all
>> works OK for you?
>>
>
> I've started to do that, but it occurs to me that we're missing out on
> NUMA placement by forcing all clocks to be on the same page. OTOH, if
> the clocks are heavily used, they'll stay in cache, and if not, who
> cares.
>
Yes, I'd say so. I'd expect the data to be very close to read-only, so
the lines should be shared pretty efficiently.
On the other hand, there's nothing to stop us from moving to multiple
pages in future (either to support NUMA placement, or just more than 64
cpus).
J
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