From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cyrill Gorcunov Subject: Re: [crash] kernel BUG at net/core/pktgen.c:3503! Date: Thu, 17 Sep 2009 21:51:55 +0400 Message-ID: <20090917175155.GC8817@lenovo> References: <20090911.202543.52533792.davem@davemloft.net> <20090915183647.GA11628@elte.hu> <20090915185112.GA17587@lenovo> <20090917.102923.174779685.davem@davemloft.net> <20090917174448.GA9548@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: David Miller , torvalds@linux-foundation.org, akpm@linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Ingo Molnar Return-path: Received: from mail-ew0-f206.google.com ([209.85.219.206]:41262 "EHLO mail-ew0-f206.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755217AbZIQRvy (ORCPT ); Thu, 17 Sep 2009 13:51:54 -0400 Content-Disposition: inline In-Reply-To: <20090917174448.GA9548@elte.hu> Sender: netdev-owner@vger.kernel.org List-ID: [Ingo Molnar - Thu, Sep 17, 2009 at 07:44:48PM +0200] ... | | > | > Ingo, does Cyrill's patch help? | | For now i've turned pktgen off in my tests. Will check it again once | things have calmed down somewhat. | | Also, i just tried to reproduce the pktgen crash with latest -git and | the config i sent - no luck, so i cannot test Cyrill's patch either. | | Btw., we are seeing some other preempt count and task related | weirdnesses as well in other code, maybe it's related. No good pattern | yet to act upon. | | Anyway - please disregard this bugreport until i've investigated it | closer. | | Ingo | I'm unable to reproduce this issue too. I was trying many ways (under kvm) -- no bug triggered. Though on a system for which I had done this patch in first place the bug was been hitting all the time (but it contains custom vcpu management code, which is not our case here). -- Cyrill