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...