Re: [Xen-users] Block IO Questions

[G.Bakalarski@xxxxxxxxxx]

Hi,
> Thanks for the tip, perhaps I give it a try at the weekend.
>
> I tried a vanilla 3.2.16+ from git with the debian kernel .config. That
> didn't change anything.

But the .config settings were the clue in our case.

When we recompiled debian's wheezy kernel source with .config from
SLES 11 SP2 or Alpine Linux (recent xen'ed kernel) the block
IO issue disappeared. We investigated further and it seems that
NUMA options OFF do the trick (Xen + NUMA problem???) but we did not
debug in details ...

Good luck

GB

> By the way Xen is 4.1.2 debian sid recompiled for debian squeeze on
> debian squeeze (there were just some minor python issues).
>
> Am 03.05.2012 00:18, schrieb G.Bakalarski@xxxxxxxxxx:
>> Hi
>>
>>
>> Did you try other (i.e. non-Debian kernel).
>>
>> I'd suggest e.g. SLES 11 SP2 or even alpine linux ... And see if this
>> helps ...
>>
>> We had problems with Block IO (unstable troughput) ) Xen'ed  Debian
>> kernels (Squeeze or Wheezy, 2.6.32 or 3.2) ... Just krenels ...
>>
>> GB
>
>
>



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