[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-ia64-devel] RE: [PATCH] Patch to make latest hgmulti-domainback to work
>From: Magenheimer, Dan (HP Labs Fort Collins) [mailto:dan.magenheimer@xxxxxx] > >> > Instead vcpu->arch.dtlb_pte is not touched. So after my patch >> > changed match_dtlb to return guest pte, above problematic >> > code may leave them out of sync there. Comments? >> >> I agree this is a bug, but I'm not sure it explains >> the problem. I will turn off HYPER_PTC_GA and see > > should be FAST_PTC_GA ^^^^^^^^^ > >> if the problem goes away. > >The problem (PL2 vs PL0) still occurs even with >that code turned off. When you disable FAST_PTC_GA, it then goes to vcpu_ptc_ga which still only handle vcpu->arch.dtlb, without touching vcpu->arch.dtlb_pte. In this case, once match_dtlb begins to return guest pte in my patch, it may contain stale value since dtlb_pte is not handled in vcpu_ptc_ga. Thanks, Kevin _______________________________________________ Xen-ia64-devel mailing list Xen-ia64-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-ia64-devel
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