From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id 98CE56B009E for ; Tue, 22 Sep 2009 08:55:36 -0400 (EDT) Date: Tue, 22 Sep 2009 13:55:46 +0100 From: Mel Gorman Subject: Re: [RFC PATCH 0/3] Fix SLQB on memoryless configurations V2 Message-ID: <20090922125546.GA25965@csn.ul.ie> References: <1253549426-917-1-git-send-email-mel@csn.ul.ie> <20090921174656.GS12726@csn.ul.ie> <20090921180739.GT12726@csn.ul.ie> <4AB85A8F.6010106@in.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <4AB85A8F.6010106@in.ibm.com> Sender: owner-linux-mm@kvack.org To: Sachin Sant Cc: Christoph Lameter , Nick Piggin , Pekka Enberg , heiko.carstens@de.ibm.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Tejun Heo , Benjamin Herrenschmidt List-ID: On Tue, Sep 22, 2009 at 10:33:11AM +0530, Sachin Sant wrote: > Mel Gorman wrote: >> On Mon, Sep 21, 2009 at 01:54:12PM -0400, Christoph Lameter wrote: >> >>> Lets just keep SLQB back until the basic issues with memoryless nodes are >>> resolved. >>> >> >> It's not even super-clear that the memoryless nodes issues are entirely >> related to SLQB. Sachin for example says that there was a stall issue >> with memoryless nodes that could be triggered without SLQB. Sachin, is >> that still accurate? >> > I think there are two different problems that we are dealing with. > > First one is the SLQB not working on a ppc64 box which seems to be specific > to only one machine and i haven't seen that on other power boxes.The patches > that you have posted seems to allow the box to boot, but eventually it hits > the stall issue(related to percpu dynamic allocator not working on ppc64), > which is the second problem we are dealing with. > Ok, I've sent out V3 of this. It's only a partial fix but it's about as far as it can be brought until the other difficulties are resolved. > The stall issue seems to be much more critical as it is affecting almost > all of the power boxes that i have tested with (4 in all). > This issue is seen with Linus tree as well and was first seen with > 2.6.31-git5 (0cb583fd..) > > The stall issue was reported here: > http://lists.ozlabs.org/pipermail/linuxppc-dev/2009-September/075791.html > Can you bisect this please? -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab -- 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