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

Bandan Das
2015-03-06T16:57:37Z

Andrey Korolyov <andrey@xdel.ru> writes:

> On Fri, Mar 6, 2015 at 1:14 AM, Andrey Korolyov <andrey@xdel.ru> wrote:
>> Hello,
>>
>> recently I`ve got a couple of shiny new Intel 2620v2s for future
>> replacement of the E5-2620v1, but I experienced relatively many events
>> with emulation errors, all traces looks simular to the one below. I am
>> running qemu-2.1 on x86 on top of 3.10 branch for testing purposes but
>> can switch to some other versions if necessary. Most of crashes
>> happened during reboot cycle or at the end of ACPI-based shutdown
>> action, if this can help. I have zero clues of what can introduce such
>> a mess inside same processor family using identical software, as
>> 2620v1 has no simular problem ever. Please let me know if there can be
>> some side measures for making entire story more clear.
>>
>> Thanks!
>>
>> KVM internal error. Suberror: 2
>> extra data[0]: 800000d1
>> extra data[1]: 80000b0d
>> EAX=00000003 EBX=00000000 ECX=00000000 EDX=00000000
>> ESI=00000000 EDI=00000000 EBP=00000000 ESP=00006cd4
>> EIP=0000d3f9 EFL=00010202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
>> ES =0000 00000000 0000ffff 00009300
>> CS =f000 000f0000 0000ffff 00009b00
>> SS =0000 00000000 0000ffff 00009300
>> DS =0000 00000000 0000ffff 00009300
>> FS =0000 00000000 0000ffff 00009300
>> GS =0000 00000000 0000ffff 00009300
>> LDT=0000 00000000 0000ffff 00008200
>> TR =0000 00000000 0000ffff 00008b00
>> GDT= 000f6e98 00000037
>> IDT= 00000000 000003ff
>> CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
>> DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
>> DR3=0000000000000000
>> DR6=00000000ffff0ff0 DR7=0000000000000400
>> EFER=0000000000000000
>> Code=48 18 67 8c 00 8c d1 8e d9 66 5a 66 58 66 5d 66 c3 cd 02 cb <cd>
>> 10 cb cd 13 cb cd 15 cb cd 16 cb cd 18 cb cd 19 cb cd 1c cb fa fc 66
>> b8 00 e0 00 00 8e
>
>
> It turns out that those errors are introduced by APICv, which gets
> enabled due to different feature set. If anyone is interested in
> reproducing/fixing this exactly on 3.10, it takes about one hundred of
> migrations/power state changes for an issue to appear, guest OS can be
> Linux or Win.

Are you able to reproduce this on a more recent upstream kernel as well ?

Bandan