From mboxrd@z Thu Jan 1 00:00:00 1970 From: ANNIE LI Subject: Re: [Xen-devel] compound skb frag pages appearing in start_xmit Date: Wed, 21 Nov 2012 10:42:42 +0800 Message-ID: <50AC3FA2.3050008@oracle.com> References: <1349790467.21847.185.camel@zakaz.uk.xensource.com> <1349790863.21172.4406.camel@edumazet-glaptop> <1349792241.21847.199.camel@zakaz.uk.xensource.com> <1349792847.21172.4479.camel@edumazet-glaptop> <1349793630.21847.208.camel@zakaz.uk.xensource.com> <1349863984.10070.26.camel@zakaz.uk.xensource.com> <1349874598.10070.39.camel@zakaz.uk.xensource.com> <748966751.20121010164949@eikelenboom.it> <1349942546.14806.7.camel@zakaz.uk.xensource.com> <151954917.20121011120004@eikelenboom.it> <1349949924.21172.8462.camel@edumazet-glaptop> <1349950494.14806.29.camel@zakaz.uk.xensource.com> <50A4540E.1010601@oracle.com> <1333495676.20121119164304@eikelenboom.it> <50AB3F9D.4070905@canonical.com> <1353403286.18229.159.camel@zakaz.uk.xensource.com> <1353411413.13542.31.camel@zakaz.uk.xensource. com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Stefan Bader , Eric Dumazet , Sander Eikelenboom , "netdev@vger.kernel.org" , xen-devel , Konrad Rzeszutek Wilk , "Marcos E. Matsunaga" , Eric Dumazet To: Ian Campbell Return-path: Received: from userp1040.oracle.com ([156.151.31.81]:16941 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752098Ab2KUCmq (ORCPT ); Tue, 20 Nov 2012 21:42:46 -0500 In-Reply-To: <1353411413.13542.31.camel@zakaz.uk.xensource.com> Sender: netdev-owner@vger.kernel.org List-ID: 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. > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xen.org > http://lists.xen.org/xen-devel