Re: [Xen-devel] compound skb frag pages appearing in start_xmit

[ANNIE LI <annie.li@xxxxxxxxxx>]

On 2012-11-20 19:36, Ian Campbell wrote:
> On Tue, 2012-11-20 at 09:21 +0000, Ian Campbell wrote:
> > On Tue, 2012-11-20 at 08:30 +0000, Stefan Bader wrote:
> > > > > When I tried to rebase my persistent grant netfront/netback patch on
> > > > > latest kernel, netperf/netserver test never succeeded. I did some test
> > > > > to find out that v3.6-rc7 works fine, but v3.7-rc1, v3.7-rc2 and
> > > > > v3.7-rc4 does not succeed in netperf/netserver test. So I keep my
> > > > > persistent grant patch only based on v3.4-rc3 now.
> > > > > Konrad thought about commit 6a8ed462f16b8455eec5ae00eb6014159a6721f0 in
> > > > > v3.7-rc1, and suggested me to test your debug patch in netfront. This
> > > > > BUG_ON happens soon after running the netperf/netserver test case.
> > > > > Thanks
> > > > > Annie
> > > > Is there any progression with this bug (rc6 is out the door, so the
> > > release of 3.7-final seems to be eminent and this bug completely
> > > cripples any networking with guests) ?
> > > +1 on that. I was testing yesterday with a PVM domU running 3.7-rc5 on Xen 4.2
> > > (but also reported from EC2 running Xen 3.4.3) c with one VCPU. I actually can
> > > trigger it by just ssh'ing into the domU (from another machine) and then run
> > > "find /". Output starts to stutter and then stops completely. When this happens
> > > a new connection still can be made and as long as only shorter output is
> > > generated the ssh connection is ok. From a dump taken it looks like user-space
> > > is waiting in some select call (without any warnon I rather won't see the tx 
> > > path).
> > Annie, are you still looking into this or shall I?
> I'll assume that silence == No. Will post a patch shortly.
Sorry for the delay response, I did create a patch, but did not post it 
out in time.
Thanks
Annie
> Ian.
>
>
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