[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PROPOSAL] Event channel for SMP-VMs: per-vCPU or per-OS?
>>> On 29.10.13 at 03:56, Luwei Cheng <chengluwei@xxxxxxxxx> wrote: > Hmm.. though all vCPUs can serve the events, the hypervisor delivers the > event to only "one" vCPU at at time, so only that vCPU can see this event. > Analytically no race condition will be introduced. No - an event is globally pending (at least in the old model, the situation is better with the new FIFO model), i.e. if more than one of the guest's vCPU-s allowed to service it would be looking at it simultaneously, they'd still need to arbitrate which one ought to handle it. So your proposed extension might need to be limited to the FIFO model. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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