From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarek Poplawski Subject: Re: [Bugme-new] [Bug 10326] New: inconsistent lock state in net_rx_action Date: Thu, 27 Mar 2008 13:49:28 +0100 Message-ID: <20080327124928.GE2845@ami.dom.local> References: <20080325134320.21525479.akpm@linux-foundation.org> <47EAD8A5.3070806@gmail.com> <20080326171403.ad186037.akpm@linux-foundation.org> <20080327085542.GA2778@ami.dom.local> <20080327021812.601776b8.akpm@linux-foundation.org> <1206615379.8514.502.camel@twins> <20080327122255.GC2845@ami.dom.local> <1206621014.8514.563.camel@twins> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Andrew Morton , netdev@vger.kernel.org, bugme-daemon@bugzilla.kernel.org, marcus@better.se, Stephen Hemminger , "Rafael J. Wysocki" , LKML , Ingo Molnar To: Peter Zijlstra Return-path: Received: from ug-out-1314.google.com ([66.249.92.173]:35017 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752507AbYC0Mni (ORCPT ); Thu, 27 Mar 2008 08:43:38 -0400 Received: by ug-out-1314.google.com with SMTP id z38so333832ugc.16 for ; Thu, 27 Mar 2008 05:43:37 -0700 (PDT) Content-Disposition: inline In-Reply-To: <1206621014.8514.563.camel@twins> Sender: netdev-owner@vger.kernel.org List-ID: On Thu, Mar 27, 2008 at 01:30:14PM +0100, Peter Zijlstra wrote: ... > My guess is that it is a race between polling the device and irq pushing > the packet. That is, normally the IRQ handler wins and netpoll doesn't > have anything to do and it doesn't traverse this code path. > > (although I must admit to being a little out of my depth here) Probably you're right but there were really a lot of testing and stressing netconsole for misterious lockups for quite a long time with this new napi, so it's hard to believe this was hidden so well... Jarek P.