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[Xen-devel] Re: [PATCH xen-unstable] Remove PSE flag from guest CR4
| To: | Dave McCracken <dcm@xxxxxxxx>, Xen Developers List <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: [PATCH xen-unstable] Remove PSE flag from guest CR4 |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Mon, 14 Sep 2009 18:42:16 +0100 |
| Cc: | Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
| Delivery-date: | Mon, 14 Sep 2009 10:43:03 -0700 |
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| In-reply-to: | <200909141227.16852.dcm@xxxxxxxx> |
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| Thread-index: | Aco1YKBQ0aiZw2DsSPyprbh7XZGoPgAAhK0W |
| Thread-topic: | [PATCH xen-unstable] Remove PSE flag from guest CR4 |
| User-agent: | Microsoft-Entourage/12.20.0.090605 |
If you hide PSE in CR4 and CPUID, how does the guest know it can use superpages? -- Keir On 14/09/2009 18:27, "Dave McCracken" <dcm@xxxxxxxx> wrote: > > When I originally did the Xen hypervisor hugepage patch I also allowed guests > to see the PSE flag in CR4. This has proven to be a mistake. Here is a patch > to remove that functionality. > > All Linux kernels will still allow userspace hugepages without the flag. > > Dave McCracken _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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