Nick Piggin wrote: > You could call it a bug I think. I don't know much about Xen though, > whether or not it expects to be able to run an arbitrary OS kernel. >
Xen's paravirtualized mode always requires a guest OS to be modified; certainly some operating systems would be very hard to make work with Xen. But you can always fall back to using shadow pagetables or full hvm (VT/SVM) mode. > Presumably, the hypervisor _could_ write protect and trap writes to > *all* page table page mappings. > Xen manages this stuff with refcounts; it doesn't maintain an rmap for these pages, so it would have to exhaustively search to do this. But aside from that, Xen never actively modifies pagetables, so this would be a new behaviour in the interface. J - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/