Messages in this thread | | | Date | Thu, 15 Apr 2010 11:04:03 +0200 | From | oerg Roedel <> | Subject | Re: [PATCH V3] perf & kvm: Enhance perf to collect KVM guest os statistics from host side |
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On Mon, Apr 15, 2030 at 04:57:38PM +0800, Zhang, Yanmin wrote:
> I checked svm.c and it seems svm.c doesn't trigger a NMI to host if the NMI > happens in guest os. In addition, svm_complete_interrupts is called after > interrupt is enabled.
Yes. The NMI is held pending by the hardware until the STGI instruction is executed. And for nested svm the svm_complete_interrupts function needs to be executed after the nested exit handling. Therefore it is done late on svm.
Joerg
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