[CentOS] Patched KVM RPMs (solves 'network shutdown under heavy load')

Farkas Levente lfarkas at lfarkas.org
Mon Mar 22 12:09:59 UTC 2010


On 03/22/2010 12:03 PM, Timo Schoeler wrote:
> Hi list,
>
> due to the necessity of having a patched KVM running, I build some new
> RPMs. However, only
>
> kmod-kvm-83-105.27.x86_64.rpm
>
> is important to replace the 'original' one as it's the only package that
> contains the patch. I didn't rename the packages, though, hopefully in
> order not to break the upgrade path provided to us.
>
> The patch adresses following problem:
>
> 'Fix a race condition where qemu finds that there are not enough virtio
> ring buffers available and the guest make more buffers available before
> qemu can enable notifications.' [0], the thread startet as 'network
> shutdown under heavy load' [1].
>
> KVM already contains the fix (since February 19th, IIRC), CentOS'
> packages doesn't.
>
> The RPMs can be found here:
>
> http://www.riscworks.net/CentOS/KVM/fix-virt-io-ring-buffer-race/

does it have an upstream (redhat) bugzilla entry?
it'd be better if they fix it...

-- 
   Levente                               "Si vis pacem para bellum!"


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