[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] long latency of domain shutdown
On 28/4/08 15:30, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > Okay, thanks - so I indeed missed the call to hypercall_preempt_check() > in relinquish_memory(), which is the key indicator here. > > However, that change deals exclusively with domain shutdown, but not > with the more general page table pinning/unpinning operations, which I > believe are (as described) vulnerable to mis-use by a malicious guest (I > realize that well behaved guests would not normally present a heavily > populated address space here, but it also cannot be entirely excluded) > - the upper bound to the number of operations on x86-64 is 512**4 > or 2**36 l1 table entries (ignoring the hypervisor hole which doesn't > need processing). True. It turns out to be good enough in practice though. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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