From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id 792086B004D for ; Thu, 18 Feb 2010 03:53:49 -0500 (EST) Date: Thu, 18 Feb 2010 08:53:36 +0000 From: Russell King - ARM Linux Subject: Re: Kernel panic due to page migration accessing memory holes Message-ID: <20100218085336.GB848@n2100.arm.linux.org.uk> References: <4B7C8DC2.3060004@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B7C8DC2.3060004@codeaurora.org> Sender: owner-linux-mm@kvack.org To: Michael Bohan Cc: linux-mm@kvack.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-ID: On Wed, Feb 17, 2010 at 04:45:54PM -0800, Michael Bohan wrote: > I have encountered a kernel panic on the ARM/msm platform in the mm > migration code on 2.6.29. My memory configuration has two discontiguous > banks per our ATAG definition. These banks end up on addresses that > are 1 MB aligned. I am using FLATMEM (not SPARSEMEM), but my > understanding is that SPARSEMEM should not be necessary to support this > configuration. Please correct me if I'm wrong. Make sure you have ARCH_HAS_HOLES_MEMORYMODEL enabled. -- 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