From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx171.postini.com [74.125.245.171]) by kanga.kvack.org (Postfix) with SMTP id 680E16B005C for ; Sun, 3 Jun 2012 21:19:09 -0400 (EDT) Received: by dakp5 with SMTP id p5so6586211dak.14 for ; Sun, 03 Jun 2012 18:19:08 -0700 (PDT) Date: Sun, 3 Jun 2012 18:18:39 -0700 (PDT) From: Hugh Dickins Subject: Re: WARNING: at mm/page-writeback.c:1990 __set_page_dirty_nobuffers+0x13a/0x170() In-Reply-To: Message-ID: 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> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Linus Torvalds 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, 3 Jun 2012, Linus Torvalds wrote: > 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. You wouldn't want me to say that I think you're right, it would impudently suggest that I might conceive of you being wrong. I sigh for your heavy burden. > > 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? Sure, ack from me on that plan. Hugh -- 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