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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] Fix races in iret hypercall
On 9/8/07 09:35, "Christoph Egger" <Christoph.Egger@xxxxxxx> wrote: > Attached patch fixes races seen on SMP when multiple HVM guests > execute the iret instruction at the same time. > > current vcpu can change in the middle of do_iret(). This is fine as a cleanup, but it does not fix any bugs! For two reasons: 1. Current vcpu *cannot* change in the middle of do_iret(). Xen does not support involuntary preemption. 2. HVM guests do not ever execute do_iret(). That function is for pv guests only. How did you conclude there was a bug? -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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