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 8D0AE6B004F for ; Sun, 12 Jul 2009 03:44:17 -0400 (EDT) Date: Sun, 12 Jul 2009 09:57:31 +0200 From: Haavard Skinnemoen Subject: Re: [BUG 2.6.30] Bad page map in process Message-ID: <20090712095731.3090ef56@siona> In-Reply-To: References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Hugh Dickins Cc: Guennadi Liakhovetski , linux-mm@kvack.org, kernel@avr32linux.org, linux-kernel@vger.kernel.org List-ID: On Fri, 10 Jul 2009 19:34:06 +0100 (BST) Hugh Dickins wrote: > I've not looked up avr32 pte layout, is 13f26ed4 good or bad? > I hope avr32 people can tell more about the likely cause. It looks OK for a user mapping, assuming you have at least 64MB of SDRAM (the SDRAM starts at 0x10000000) -- all the normal userspace flags are set and all the kernel-only flags are unset. It's marked as executable, so it could be that the segfault was caused by the CPU executing the wrong code. The virtual address 0x4377f876 is a bit higher than what you normally see on avr32 systems, but there's not necessarily anything wrong with it -- userspace goes up to 0x80000000. Btw, is preempt enabled when you see this? Haavard -- 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