From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jay Lan Date: Wed, 10 Sep 2008 20:21:35 +0000 Subject: Re: kdump broken on Altix 350 Message-Id: <48C82C4F.1050002@sgi.com> List-Id: References: <20080829180302.6e67c26e@halley.suse.de> <20080829180531.0524a1e4@halley.suse.de> <57C9024A16AD2D4C97DC78E552063EA30A0067D6@orsmsx505.amr.corp.intel.com> <20080910134805.488b43f9@kepler.site> In-Reply-To: <20080910134805.488b43f9@kepler.site> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Bernhard Walle Cc: linux-ia64@vger.kernel.org, "Luck, Tony" , kexec@lists.infradead.org, Simon Horman Bernhard Walle wrote: > * "Luck, Tony" [2008-08-29]: > >>> your commit >>> >>> commit 10617bbe84628eb18ab5f723d3ba35005adde143 >>> Author: Tony Luck >>> Date: Tue Aug 12 10:34:20 2008 -0700 >>> >>> [IA64] Ensure cpu0 can access per-cpu variables in early boot >>> code >>> >>> broke kdump on our Altix 350. I get following early crash in kdump >>> kernel >> Sorry about that. I'll try to reproduce it here. > > I had some discussion about that with Jay Lan that he could not > reproduce that on his machine. We thought it was different config, but > now I can verify that the problem is reproducible here with the default > configuration (plus CONFIG_SATA_VITESSE). Hi Bernhard and Tony, I started seeing this problem, and it affected A4700 in addition to A350. It was not clear the system hang was related to this problem. I saw a kdump kernel hang at cpu_init() at an A350, and a hang in find_memory on handling pernode space thing at an A4700. No error records and no backtrace, so i did not relate my problem to this one at first. Out of curiosity, i backed out Tony's patch mentioned from 2.6.27-rc5 and the kdump kernel hangs were gone on both systems. Also, i had a kdump kernel MCA problem that was caused by kexec underallocating kernel memory for the kdump kernel. The problem does not happen again after i backed out the patch. Regards, jay > > > Bernhard > > _______________________________________________ > kexec mailing list > kexec@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec