Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759872Ab2FANnd (ORCPT ); Fri, 1 Jun 2012 09:43:33 -0400 Received: from mx1.redhat.com ([209.132.183.28]:61484 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758209Ab2FANnc (ORCPT ); Fri, 1 Jun 2012 09:43:32 -0400 Date: Fri, 1 Jun 2012 09:43:23 -0400 From: Dave Jones To: Linus Torvalds Cc: Linux Kernel , linux-mm@kvack.org, Andrew Morton , Hugh Dickins , Cong Wang Subject: Re: WARNING: at mm/page-writeback.c:1990 __set_page_dirty_nobuffers+0x13a/0x170() Message-ID: <20120601134323.GA5214@redhat.com> Mail-Followup-To: Dave Jones , Linus Torvalds , Linux Kernel , linux-mm@kvack.org, Andrew Morton , Hugh Dickins , Cong Wang References: <20120530163317.GA13189@redhat.com> <20120531005739.GA4532@redhat.com> <20120601023107.GA19445@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1324 Lines: 31 On Thu, May 31, 2012 at 07:43:25PM -0700, Linus Torvalds wrote: > On Thu, May 31, 2012 at 7:31 PM, Dave Jones wrote: > > > > So I bisected it anyway, and it led to ... > > Ok, that doesn't sound entirely unlikely, but considering that you're > nervous about the bisection, please just try to revert it and see if > that fixes your testcase. > > You'll obviously need to revert the commit that removes > vmtruncate_range() too, since reverting 3f31d07571ee will re-introduce > the use of it (it's the next one: > 17cf28afea2a1112f240a3a2da8af883be024811), but it looks like those two > commits revert cleanly and the end result seems to compile ok. crap, so much for that theory. I ran latest with those two reverted overnight, and woke up to a dead box. Over serial console, I see a bunch of those same compaction oopses (Via sys_mmap_pgoff), and then kernel BUG at include/linux/mm.h:448! was the last thing it said before it choked. I'll redo the bisect. It's possible that one of the 'good' paths just didn't run for long enough. Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/