From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <44576BF5.8070903@yahoo.com.au> Date: Wed, 03 May 2006 00:25:57 +1000 From: Nick Piggin MIME-Version: 1.0 Subject: Re: assert/crash in __rmqueue() when enabling CONFIG_NUMA References: <20060419112130.GA22648@elte.hu> <20060502070618.GA10749@elte.hu> <200605020905.29400.ak@suse.de> <44576688.6050607@mbligh.org> In-Reply-To: <44576688.6050607@mbligh.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: "Martin J. Bligh" Cc: Andi Kleen , Ingo Molnar , linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management , Andy Whitcroft List-ID: Martin J. Bligh wrote: >> Oh that's a 32bit kernel. I don't think the 32bit NUMA has ever worked >> anywhere but some Summit systems (at least every time I tried it it >> blew up on me and nobody seems to use it regularly). Maybe it would be >> finally time to mark it CONFIG_BROKEN though or just remove it (even >> by design it doesn't work very well) > > > Bollocks. It works fine, and is tested every single day, on every git > release, and every -mm tree. Whatever the case, there definitely does not appear to be sufficient zone alignment enforced for the buddy allocator. I cannot see how it could work if zones are not aligned on 4MB boundaries. Maybe some architectures / subarch code naturally does this for us, but Ingo is definitely hitting this bug because his config does not (align, that is). I've randomly added a couple more cc's. -- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org