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Re: [Xen-devel] [PATCH] xen: Implement domain runstates
| To: | Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] xen: Implement domain runstates |
| From: | Keir Fraser <keir@xxxxxxx> |
| Date: | Thu, 25 Nov 2010 22:10:57 +0000 |
| Cc: | |
| Delivery-date: | Thu, 25 Nov 2010 14:12:23 -0800 |
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| Thread-topic: | [Xen-devel] [PATCH] xen: Implement domain runstates |
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On 25/11/2010 19:11, "Ian Jackson" <Ian.Jackson@xxxxxxxxxxxxx> wrote:
> George Dunlap writes ("Re: [Xen-devel] [PATCH] xen: Implement domain
> runstates"):
>> I wouldn't offer to put it in xentop just because I wanted to get the
>> patch out of the patchqueue. I think it's a useful feature, that many
>> people would use if they knew about it. If I didn't think it was
>> useful, by far the simplest way to get it out of the patchqueue would be
>> to simply remove the functionality from the next release of XenServer.
>
> FWIW I think this sounds like a useful thing to have in xentop on its
> own account, not just to satisfy Keir's (sensible) requirement.
My further fear about domain runstates is that it adds an extra cost on
every VCPU schedule/deschedule, linear in number of vcpus. We want to keep
that path short, not add extra accounting crap to it.
-- Keir
> Ian.
>
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