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Date: Mon, 19 Nov 2012 16:43:04 +0100 From: Sander Eikelenboom <linux@...elenboom.it> To: ANNIE LI <annie.li@...cle.com> CC: Ian Campbell <Ian.Campbell@...rix.com>, Eric Dumazet <eric.dumazet@...il.com>, Eric Dumazet <edumazet@...gle.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, Konrad Rzeszutek Wilk <konrad@...nel.org>, xen-devel <xen-devel@...ts.xen.org>, "Marcos E. Matsunaga" <Marcos.Matsunaga@...cle.com> Subject: Re: [Xen-devel] compound skb frag pages appearing in start_xmit Thursday, November 15, 2012, 3:31:42 AM, you wrote: > On 2012-10-11 18:14, Ian Campbell wrote: >> On Thu, 2012-10-11 at 11:05 +0100, Eric Dumazet wrote: >>> On Thu, 2012-10-11 at 12:00 +0200, Sander Eikelenboom wrote: >>> >>>> Probably due to the BUG_ON from the patch below, i changed it into a WARN_ON. >>>> And i seem to hit it, but only in one of the guests at the moment and it triggers quite irregularly. >>> xennet_make_frags() is able to split the skb->head in multiple page-size >>> chunks. >>> >>> It should do the same for fragments >> Right, I just want to be reproduce the issue so I can know I've fixed it >> properly ;-) > Hi Ian, > I can reproduce this BUG_ON when running netperf/netserver test between > two domus running on the same dom0. The domu and dom0 all use v3.7-rc1. > 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) ? -- Sander >> >> Ian. >> >> >> >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@...ts.xen.org >> http://lists.xen.org/xen-devel -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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