[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 Tue, Oct 29, 2013 at 7:00 PM, Roger Pau Monné <roger.pau@xxxxxxxxxx> wrote:
The goal is: to process the event asap. So, if the event is indeed stolen by another vCPU, we should be happy about it because it means that the event can be processed "faster”, before the targeted vCPU picks it:)
With current implementation, the upcall only happens when the processor switches from the hypervisor world to the guest world. It seems that the likelihood that, such"switch" happens on multiple CPUs at the same time, is very small.
Even if the event fires on several vCPUs, what is the negative effect..? Is the guest OS able to tolerate it (reentrant IRQ handler)? Thanks, Luwei _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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