Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752883Ab1EIQf7 (ORCPT ); Mon, 9 May 2011 12:35:59 -0400 Received: from e28smtp07.in.ibm.com ([122.248.162.7]:47208 "EHLO e28smtp07.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751837Ab1EIQf6 (ORCPT ); Mon, 9 May 2011 12:35:58 -0400 Date: Mon, 9 May 2011 22:05:40 +0530 From: "K.Prasad" To: Andi Kleen Cc: Linux Kernel Mailing List , "Luck, Tony" , Vivek Goyal , kexec@lists.infradead.org, ying.huang@intel.com Subject: Re: [Bug] Kdump does not work when panic triggered due to MCE Message-ID: <20110509163540.GA1963@in.ibm.com> Reply-To: prasad@linux.vnet.ibm.com References: <20110506165412.GB2719@in.ibm.com> <20110506173825.GK11636@one.firstfloor.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110506173825.GK11636@one.firstfloor.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1243 Lines: 32 On Fri, May 06, 2011 at 07:38:25PM +0200, Andi Kleen wrote: > > Has anybody tested this before? Or have found kdump working when fatal > > MCEs have actually occurred? > > Ying did some testing. mce-test has test cases for kdump. > We'd be glad to hear about any successful testcases with recent kernels. My manual testing was quite similar to what the LTP kdump testcase would do i.e. configure kdump service, trigger crash through /proc/sysrq-trigger and watchout for kdump....but as you could see in the logs, that did not happen. > My guess is you injected the error into some area used by the kexec > code or boot up path of the kexec kernel. > > -Andi The logs did not suggest that the second kernel was booted into. The "Rebooting in ... seconds" message appeared from the first kernel. I tried the kdump testcase in atleast two dissimilar machines but with the same results, so it is not clear if the kexec code was affected by the MCE injection in both the cases. Thanks, K.Prasad -- 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/