Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753653Ab1DIDA0 (ORCPT ); Fri, 8 Apr 2011 23:00:26 -0400 Received: from mx2.fusionio.com ([64.244.102.31]:42943 "EHLO mx2.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751844Ab1DIDAZ (ORCPT ); Fri, 8 Apr 2011 23:00:25 -0400 X-ASG-Debug-ID: 1302318022-01de284cf8125410001-xx1T2L X-Barracuda-Envelope-From: JAxboe@fusionio.com Message-ID: <4D9FCBC3.9040206@fusionio.com> Date: Sat, 9 Apr 2011 05:00:19 +0200 From: Jens Axboe MIME-Version: 1.0 To: Rob Landley CC: Pete Clements , linux-kernel , "linux-ide@vger.kernel.org" , Tejun Heo Subject: Re: Commit 7eaceaccab5f40 causing boot hang. References: <201103291551.p2TFpDqZ001692@clem.clem-digital.net> <4D92C874.7040104@parallels.com> <4D931634.5030807@fusionio.com> <4D933584.5050005@parallels.com> <4D94432D.5080601@fusionio.com> <4D944544.9040705@parallels.com> <4D945247.4080404@fusionio.com> <4D945976.8000401@fusionio.com> <4D945BAD.10309@parallels.com> <4D9460F8.7080606@fusionio.com> <4D9FCAF6.5030301@parallels.com> X-ASG-Orig-Subj: Re: Commit 7eaceaccab5f40 causing boot hang. In-Reply-To: <4D9FCAF6.5030301@parallels.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mail1.int.fusionio.com[10.101.1.21] X-Barracuda-Start-Time: 1302318022 X-Barracuda-URL: http://10.101.1.181:8000/cgi-mod/mark.cgi X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=9.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.60314 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1369 Lines: 40 On 2011-04-09 04:56, Rob Landley wrote: > On 03/31/2011 06:09 AM, Jens Axboe wrote: >> On 2011-03-31 12:47, Rob Landley wrote: >>> On 03/31/2011 05:37 AM, Jens Axboe wrote: >>>>>>> Can you send me your .config? >>>>>> >>>>>> It was attached to the first message in this series, here it is again. >>>>>> >>>>>> I update it via "make oldconfig" and hold down return. >>>>>> >>>>>> I boot it via: >>>>>> >>>>>> qemu-system-x86_64 -m 1024 -kernel arch/x86/boot/bzImage \ >>>>>> -hda ~/sid.ext3 -append "root=/dev/hda rw" >>>>> >>>>> Much better, I see the hang now! Now to try and diagnose... >>>> >>>> It seems to hard hang, looks very odd: >>> >>> I should have mentioned that: when it hangs, you can't page back up in >>> the console display anymore. >> >> Data point - only seems to happen on UP. If you add -smp X to kvm, then >> it boots and works just fine. It smells oddly like some sort of irq >> event. >> > > The workaround for this is to disable preemption, by the way. Indeed, I think those bits were mentioned earlier. I will get to this early next week, been away traveling and not back yet. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/