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 923036B0095 for ; Thu, 16 Dec 2010 10:15:53 -0500 (EST) Received: from d01dlp02.pok.ibm.com (d01dlp02.pok.ibm.com [9.56.224.85]) by e2.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id oBGEx5qY029187 for ; Thu, 16 Dec 2010 09:59:06 -0500 Received: from d01relay03.pok.ibm.com (d01relay03.pok.ibm.com [9.56.227.235]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id 5FAFA4DE8056 for ; Thu, 16 Dec 2010 10:13:41 -0500 (EST) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay03.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id oBGFFnAT264482 for ; Thu, 16 Dec 2010 10:15:49 -0500 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id oBGFFTLM018317 for ; Thu, 16 Dec 2010 10:15:49 -0500 Date: Thu, 16 Dec 2010 07:11:22 -0800 From: "Paul E. McKenney" Subject: Re: linux-next early user mode crash (Was: Re: Transparent Hugepage Support #33) Message-ID: <20101216151122.GA2203@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20101215051540.GP5638@random.random> <20101216095408.3a60cbad.kamezawa.hiroyu@jp.fujitsu.com> <20101215171809.0e0bc3d5.akpm@linux-foundation.org> <20101216130251.12dbe8d8.sfr@canb.auug.org.au> <20101216052958.GA2161@linux.vnet.ibm.com> <20101216170814.6a874692.sfr@canb.auug.org.au> <20101216180047.4bb69b80.sfr@canb.auug.org.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101216180047.4bb69b80.sfr@canb.auug.org.au> Sender: owner-linux-mm@kvack.org To: Stephen Rothwell Cc: Andrew Morton , KAMEZAWA Hiroyuki , Andrea Arcangeli , linux-mm@kvack.org, Linus Torvalds , linux-kernel@vger.kernel.org, Marcelo Tosatti , Adam Litke , Avi Kivity , Hugh Dickins , Rik van Riel , Mel Gorman , Dave Hansen , Benjamin Herrenschmidt , Ingo Molnar , Mike Travis , Christoph Lameter , Chris Wright , bpicco@redhat.com, KOSAKI Motohiro , Balbir Singh , "Michael S. Tsirkin" , Peter Zijlstra , Johannes Weiner , Daisuke Nishimura , Chris Mason , Borislav Petkov , Miklos Szeredi List-ID: On Thu, Dec 16, 2010 at 06:00:47PM +1100, Stephen Rothwell wrote: > Hi Paul, > > On Thu, 16 Dec 2010 17:08:14 +1100 Stephen Rothwell wrote: > > > > On Wed, 15 Dec 2010 21:29:58 -0800 "Paul E. McKenney" wrote: > > > > > > RCU problems would normally take longer to run the system out of memory, > > > but who knows? > > > > > > I did a push into -rcu in the suspect time frame, so have pulled it. I am > > > sure that kernel.org will push this change to its mirrors at some point. > > > Just in case tree-by-tree bisecting is faster than commit-by-commit > > > bisecting. > > > > I have bisected it down to the rcu tree, so the three commits that were > > added yesterday are the suspects. I am still bisecting. If will just > > revert those three commits from linux-next today in the hope that Andrew > > will end up with a working tree. > > Bisect finished: > > 4e40200dab0e673b019979b5b8f5e5d1b25885c2 is first bad commit > commit 4e40200dab0e673b019979b5b8f5e5d1b25885c2 > Author: Paul E. McKenney > Date: Fri Dec 10 15:02:47 2010 -0800 > > rcu: fine-tune grace-period begin/end checks > > Use the CPU's bit in rnp->qsmask to determine whether or not the CPU > should try to report a quiescent state. Handle overflow in the check > for rdp->gpnum having fallen behind. > > Signed-off-by: Paul E. McKenney > > So far 4 of my 6 boot tests that failed yesterday have succeeded today > (with those last three rcu commits reverted) - the others are still > building. So I blew it not once, but twice -- once in the patch itself, and once in messing up my -next process. :-/ Please accept my apologies!!! Thanx, Paul -- 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 policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: email@kvack.org