From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx187.postini.com [74.125.245.187]) by kanga.kvack.org (Postfix) with SMTP id 26A7F6B005C for ; Sun, 3 Jun 2012 19:13:35 -0400 (EDT) Received: by wefh52 with SMTP id h52so3347022wef.14 for ; Sun, 03 Jun 2012 16:13:33 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: <20120601023107.GA19445@redhat.com> <20120601161205.GA1918@redhat.com> <20120601171606.GA3794@redhat.com> <20120603181548.GA306@redhat.com> <20120603183139.GA1061@redhat.com> <20120603205332.GA5412@redhat.com> From: Linus Torvalds Date: Sun, 3 Jun 2012 16:13:13 -0700 Message-ID: Subject: Re: WARNING: at mm/page-writeback.c:1990 __set_page_dirty_nobuffers+0x13a/0x170() Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org List-ID: To: Hugh Dickins Cc: Dave Jones , Bartlomiej Zolnierkiewicz , Kyungmin Park , Marek Szyprowski , Mel Gorman , Minchan Kim , Rik van Riel , Andrew Morton , Cong Wang , Markus Trippelsdorf , linux-kernel@vger.kernel.org, linux-mm@kvack.org On Sun, Jun 3, 2012 at 3:17 PM, Hugh Dickins wrote: > > But another strike against that commit: I tried fixing it up to use > start_page instead of page at the end, with the worrying but safer > locking I suggested at first, with a count of how many times it went > there, and how many times it succeeded. You can't use start_page anyway, it might not be a valid page. There's a reson it does that "pfn_valid_within()", methinks. Anyway, my current plan is to apply your "mm: fix warning in __set_page_dirty_nobuffers" patch - even if it's just a harmless WARN_ON_ONCE(), and revert 5ceb9ce6fe94. Sounds like Dave hit normally hit his problem much before two hours, and it must be even longer now. Ack on that plan? Linus -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org