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[Xen-devel] Re: pvclock in userland (reprise)
| To: | Jan Beulich <JBeulich@xxxxxxxxxx>, "Xen-Devel (E-mail)" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: pvclock in userland (reprise) |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 18 Sep 2009 09:06:13 +0100 |
| Cc: | Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>, Donald D Dugger <donald.d.dugger@xxxxxxxxx> |
| Delivery-date: | Fri, 18 Sep 2009 01:06:43 -0700 |
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| Thread-index: | Aco4McgEE3Z53JnCSK+JyX+Z4wIsaQABRuC2 |
| Thread-topic: | pvclock in userland (reprise) |
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On 18/09/2009 08:29, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote: >> I don't think mapping things into application address space is really >> possible without guest kernel changes. The guest kernel owns and manages the >> pte that you'd be overwriting. Just blatting the pte would not be good form. > > Unless they sit in Xen's virtual space. Oh yes, I remember we talked about that before. That is possible, but the design fell down on other points. I think guest kernel involvement, even if only as a kernel driver, should make this more tractable. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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