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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 4/4] Enable VirtualPC 2007 run on top of XEN: add_write_for_data_pages
At 18:06 +0800 on 01 Feb (1201889179), Su, Disheng wrote: > Tim Deegan wrote: > > Unfortunately, this isn't safe for SMP guests -- vcpu0's wp bit being > > clear shouldn't let vcpu1 ignore the _PAGE_RW bits on shared mappings. > > Yes, this situation havn't be handled. Could you give me some > suggestion? > How about out-of-sync shadow for CR0.wp = 0? Yes, out-of-sync shadows will indeed help here, and we hope to have some out-of-sync patches in the next month or two. One down-side is that OOS tends to be an overall performance loss for multi-processor guests. Cheers, Tim. -- Tim Deegan <Tim.Deegan@xxxxxxxxxx> Principal Software Engineer, Citrix Systems (R&D) Ltd. [Company #02300071, SL9 0DZ, UK.] _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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