Re: [Xen-devel] Problem with booting 2.6.32.16 pvops DomU

[GiovanniB <giovannib1979@xxxxxxxxx>]

Hello

same problem here.

Supermicro Board
XEON E5506

xm dmesg:
(XEN) traps.c:2230:d11 Domain attempted WRMSR 000000000000008b from
00000011:00000000 to 00000000:00000000.
(XEN) traps.c:2230:d11 Domain attempted WRMSR 000000000000008b from
00000011:00000000 to 00000000:00000000.
(XEN) traps.c:2230:d11 Domain attempted WRMSR 000000000000008b from
00000011:00000000 to 00000000:00000000.
(XEN) traps.c:2230:d12 Domain attempted WRMSR 000000000000008b from
00000011:00000000 to 00000000:00000000.
(XEN) traps.c:2230:d12 Domain attempted WRMSR 000000000000008b from
00000011:00000000 to 00000000:00000000.
(XEN) traps.c:2230:d12 Domain attempted WRMSR 000000000000008b from
00000011:00000000 to 00000000:00000000.
(XEN) traps.c:2230:d12 Domain attempted WRMSR 000000000000008b from
00000011:00000000 to 00000000:00000000


domU hangs here with 400% CPU load (4 vcpus)
(same problem with 1 vcpu)

...
[    1.807477] kjournald starting.  Commit interval 5 seconds
[    2.005607] EXT3 FS on xvda1, internal journal
[    2.005618] EXT3-fs: recovery complete.
[    2.005626] EXT3-fs: mounted filesystem with writeback data mode.
[    2.005643] VFS: Mounted root (ext3 filesystem) on device 202:1.
[    2.005727] Freeing unused kernel memory: 580k freed
[    2.005892] Write protecting the kernel read-only data: 8160k

here it hangs

2.6.32.15 there is no problem. I have used the same .config for 2.6.32.16.

I have recompiled it with no energy save option, same error.
C1 and else are disabled in BIOS.

Regards
Gio


Jeremy Fitzhardinge wrote:
> 
> On 07/07/2010 02:07 AM, Carsten Schiers wrote:
>> Hi,
>>
>> I tried to boot a 64 Bit 2.6.32.16 pvops DomU from Jeremy's git on Xen
>> 3.4.4-rc1-pre 
>> and 64 Bit 2.6.18.8 Dom0.
>>
>> It will hang very quickly after 0.5 secs and produce the following output
>> on xm dmesg:
>>
>> (XEN) traps.c:2230:d25 Domain attempted WRMSR 00000000c0010004 from 
>> 00009310:79804ace to 00000000:00000000
>>
>> (XEN) traps.c:2230:d25 Domain attempted WRMSR 00000000c0010000 from 
>> 00000009:0487e489 to 00000000:00430076
>>   
> 
> Do you get any other console output?  Could you boot with
> "earlyprink=xen" (and "console=hvc0" if you don't already) on the kernel
> command line to see if any more comes out.
> 
> Those two MSRs relate to the K8 performance counter subsystem, but I
> can't see any obviously relevent changes in 2.6.32.15->16 which might
> cause this regression.
> 
> It might also be useful to use xenctx to work out where the hang is.
> 
> Thanks,
>     J
> 
>>
>> BR,
>> Carsten.
>>
>>
>>
>> ----- Originalnachricht -----
>> Von: Carsten Schiers <carsten@xxxxxxxxxx>
>> Gesendet: Mon, 5.7.2010 11:09
>> An: xen-devel@xxxxxxxxxxxxxxxxxxx
>> Betreff: [Xen-devel] Question on xenpm
>>
>> Dear all,
>>
>> after having upgraded my server from AMD 4050e to X4 640, I now use
>> cpufreq=xen and had
>> to adapt a munin script (monitoring tool) to display the residency in the
>> different P-states.
>> This script uses /sys/device/system/cpu/cpu0/cpufreq to read out the
>> information, whereas
>> I now use xenpm get-cpufreq-state.
>>
>> Before I noticed that the CPU is in highest possible P-state (lowest
>> frequences) nearly all 
>> of the time, and a minimal percentage in the lowest. Now I can see a
>> 50/50 distribution. 
>> Interesting enough, the xenpm get-cpuidle-state will show that the CPUs
>> are at aprox. 90%
>> in C1 idle state.
>>
>> Can there be a difference in how the two methods to collect the info are
>> working? I mean 
>> something like xenpm will not count residency when in C1, but cpufreq
>> driver will normaly
>> do?
>>
>> BR,
>> Carsten.
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel
>>
>>   
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
> 
> 

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