Re: [Qemu-devel] E5-2620v2 - emulation stop error

Paolo Bonzini
2015-04-01T13:19:42Z

On 01/04/2015 14:26, Andrey Korolyov wrote:
> Yes, I disabled host watchdog during runtime. Indeed guest-induced NMI
> would look different and they had no reasons to be fired at this stage
> inside guest. I`d suspect a hypervisor hardware misbehavior there but
> have a very little idea on how APICv behavior (which is completely
> microcode-dependent and CPU-dependent but decoupled from peripheral
> hardware) may vary at this point, I am using 1.20140913.1 ucode
> version from debian if this can matter. Will send trace suggested by
> Paolo in a next couple of hours. Also it would be awesome to ask
> hardware folks from Intel who can prove or disprove my abovementioned
> statement (as I was unable to catch the problem on 2603v2 so far, this
> hypothesis has some chance to be real).

Yes, the interaction with the NMI watchdog is unexpected and makes a
processor erratum somewhat more likely.

Paolo