From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarek Poplawski Subject: Re: [Bugme-new] [Bug 16626] New: Machine hangs with EIP at skb_copy_and_csum_dev Date: Sat, 21 Aug 2010 10:07:35 +0200 Message-ID: <20100821080735.GA2409@del.dom.local> References: <4C6E5EA7.3040609@fs.uni-ruse.bg> <20100820193835.GA6025@del.dom.local> <20100821074742.GA2367@del.dom.local> <1282377058.2636.12.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Plamen Petrov , Andrew Morton , netdev@vger.kernel.org, bugzilla-daemon@bugzilla.kernel.org, bugme-daemon@bugzilla.kernel.org To: Eric Dumazet Return-path: Received: from mail-bw0-f46.google.com ([209.85.214.46]:60109 "EHLO mail-bw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751535Ab0HUIHn (ORCPT ); Sat, 21 Aug 2010 04:07:43 -0400 Received: by bwz11 with SMTP id 11so2683865bwz.19 for ; Sat, 21 Aug 2010 01:07:41 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1282377058.2636.12.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: On Sat, Aug 21, 2010 at 09:50:58AM +0200, Eric Dumazet wrote: > Le samedi 21 ao=C3=BBt 2010 =C3=A0 09:47 +0200, Jarek Poplawski a =C3= =A9crit : > > On Fri, Aug 20, 2010 at 09:38:35PM +0200, Jarek Poplawski wrote: > > > Plamen Petrov wrote, On 20.08.2010 12:53: > > > > So, I guess its David and Herbert's turn?... > > >=20 > > > If you're bored in the meantime I'd suggest to do check the realt= ek > > > driver eg: > > > - for locking with the patch below, > > > - to turn off with ethtool its tx-checksumming and/or scatter-gat= her, > >=20 > > After rethinking, it's almost impossible this patch could change > > anything here, so don't bother, but consider mainly the second > > proposal. > >=20 > > Jarek P. >=20 > Indeed ;) >=20 > Its true that not many nics use the skb_copy_and_csum_dev() helper, > maybe this one must be updated somehow ? >=20 Yes, it seems it should be possible at least to handle the bug with a warning and error return, considering Plamen's problems with getting the trace. Jarek P.