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xen-devel
Re: [Xen-devel] [patch 14/33] xen: xen time implementation
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To: |
Andi Kleen <ak@xxxxxxx> |
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Subject: |
Re: [Xen-devel] [patch 14/33] xen: xen time implementation |
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From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Wed, 06 Jun 2007 07:15:31 -0700 |
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Cc: |
Jiri Bohac <jbohac@xxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, lkml <linux-kernel@xxxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx> |
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Wed, 06 Jun 2007 07:13:50 -0700 |
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Andi Kleen wrote:
>> I once had some code in there to do that, implemented in very boneheaded
>> way with a spinlock to protect the "last time returned" variable. I
>> expect there's a better way to implement it.
>>
>
> But any per CPU setup likely needs this to avoid non monotonicity
Yeah. The point I didn't quite make was that this should be something
that the clock core should handle rather than dealing with it in every
clocksource.
J
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