From mboxrd@z Thu Jan  1 00:00:00 1970
From: Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: strange guest slowness after some time
Date: Thu, 19 Mar 2009 15:29:14 +1030
Message-ID: <200903191529.15081.rusty@rustcorp.com.au>
References: <49B29705.6000904@wpkg.org> <49BFF8D2.5080000@wpkg.org> <49C094D0.2070905@redhat.com>
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Cc: Tomasz Chmielewski <mangoo@wpkg.org>,
	Felix Leimbach <felix.leimbach@gmx.net>, kvm@vger.kernel.org,
	Anthony Liguori <anthony@codemonkey.ws>
To: Avi Kivity <avi@redhat.com>
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On Wednesday 18 March 2009 16:59:36 Avi Kivity wrote:
> Tomasz Chmielewski wrote:
> > virtio_net virtio0: id 64 is not a head!

This means that qemu said "I've finished with buffer 64" and the guest didn't
know anything about buffer 64.

We should not lock up, tho networking is toast: I think that qemu got upset
and that caused this as well as it to chew 100% cpu.

I'll see if I can reproduce with kvm-84 userspace and 2.6.27 guests, 32-bit
guests on a 64-bit AMD host.  What's your kvm/qemu command line?

Thanks,
Rusty.