From mboxrd@z Thu Jan  1 00:00:00 1970
From: Fabian Deutsch <fabian.deutsch@gmx.de>
Subject: Re: massive performance drop after a while when using virtio nics
Date: Tue, 09 Sep 2008 12:32:12 +0200
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To: Mark McLoughlin <markmc@redhat.com>
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Am Dienstag, den 09.09.2008, 11:22 +0100 schrieb Mark McLoughlin:
> Hi,
> 
> On Sat, 2008-08-23 at 21:21 +0200, Fabian Deutsch wrote:
> > Hey.
> > 
> > When running a guest in the following setup, I observ a "massive"
> > performance decrease after a couple of gigabytes of transfrerred data.
> > 
> > other guests keep running fine (no regressions) and nothing unusual is
> > observed on the host.
> 
> If you do "killall -ALRM qemu-kvm" after the slowdown has occurred, does
> it make things speed up again for a while?
> 

It seems so! 
Fantastic.

> If so, the issue is fixed by:
> 
>   http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ba661292a2bc6ddd305a212b0526e5dc22195fe7
> 
> It also got applied in 2.6.26.3 and 2.6.25.16.
> 

So it was some signaling-bug on the .. client side?

Cheers!
fabian