From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx177.postini.com [74.125.245.177]) by kanga.kvack.org (Postfix) with SMTP id 4B3AE6B00B8 for ; Thu, 6 Dec 2012 12:20:23 -0500 (EST) Received: from ipb2.telenor.se (ipb2.telenor.se [195.54.127.165]) by smtprelay-h22.telenor.se (Postfix) with ESMTP id 6ABF5E8CAE for ; Thu, 6 Dec 2012 18:20:21 +0100 (CET) From: "Henrik Rydberg" Date: Thu, 6 Dec 2012 18:22:25 +0100 Subject: Re: Oops in 3.7-rc8 isolate_free_pages_block() Message-ID: <20121206172225.GA978@polaris.bitmath.org> References: <20121206091744.GA1397@polaris.bitmath.org> <20121206144821.GC18547@quack.suse.cz> <20121206161934.GA17258@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20121206161934.GA17258@suse.de> Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: Jan Kara , Linus Torvalds , linux-mm@kvack.org, Linux Kernel Mailing List > Still travelling and am not in a position to test this properly :(. > However, this bug feels very similar to a bug in the migration scanner where > a pfn_valid check is missed because the start is not aligned. Henrik, when > did this start happening? I would be a little surprised if it started between > 3.6 and 3.7-rcX but maybe it's just easier to hit now for some reason. How > reproducible is this? Is there anything in particular you do to trigger the > oops? Does the following patch help any? It's only compile tested I'm afraid. I managed to trigger the path several times with a small memory-intensive program, and since I am still here, Tested-by: Henrik Rydberg Thanks! Henrik -- 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