Re: [Qemu-devel] any known virtio-net regressions in Qemu 2.7?

[Stefan Hajnoczi]

On Mon, Dec 19, 2016 at 07:37:30PM +0100, Stefan Priebe - Profihost AG wrote:
> Am 19.12.2016 um 12:03 schrieb Stefan Hajnoczi:
> > On Fri, Dec 16, 2016 at 10:00:36PM +0100, Stefan Priebe - Profihost AG 
> > wrote:
> >>
> >> Am 15.12.2016 um 07:46 schrieb Alexandre DERUMIER:
> >>> does rollbacking the kernel to previous version fix the problem ?
> >>
> >> The culprit is the used tuned agent from Redhat
> >> (https://github.com/redhat-performance/tuned). The used profile
> >> virtual-host results in these problems. Stopping tuned or using another
> >> profile like throughput-performance everything is fine again.
> > 
> > Interesting discovery.  Have you filed a bug report about it?
> 
> As we're not using RHEL, nor CentOS i didn't expect this to make sense
> ;-) I just believed that something in the kernel changed.

I see.  At least the tuned maintainers are aware of it now.  If others
report the same problem maybe it can be solved.

Thanks!

Stefan

> >> after upgrading a cluster OS, Qemu, ... i'm experiencing slow and
> >> volatile network speeds inside my VMs.
> >>
> >> Currently I've no idea what causes this but it's related to the host
> >> upgrades. Before i was running Qemu 2.6.2.
> >>
> >> I'm using virtio for the network cards.
> > 
> > Stefan
> >

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