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Re: [Xen-devel] [PATCH][v3] PV featured HVM(hybrid) support in Xen
| To: | Sheng Yang <sheng@xxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH][v3] PV featured HVM(hybrid) support in Xen |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Mon, 08 Feb 2010 10:09:36 +0000 |
| Cc: | Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Mon, 08 Feb 2010 02:09:59 -0800 |
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| In-reply-to: | <201002081631.33727.sheng@xxxxxxxxxxxxxxx> |
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| Thread-topic: | [Xen-devel] [PATCH][v3] PV featured HVM(hybrid) support in Xen |
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On 08/02/2010 08:31, "Sheng Yang" <sheng@xxxxxxxxxxxxxxx> wrote: >> Why can't you leave LAPIC available for things like INIT-SIPI-SIPI, and >> simply not use it for things you need higher perf for? > > I am not quite understand why we need to stick to INIT-SIPI-SIPI. For the > physical cpus, we can't tell their state directly, so we need a protocol, like > INIT-SIPI-SIPI; but for virtual cpus, we have hypercall as our protocol, so we > can easily tell them when and where to start, which is much more directly like > PV domU did. Fine, I guess. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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