From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp01.au.ibm.com (e23smtp01.au.ibm.com [202.81.31.143]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp01.au.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id A2607DE223 for ; Thu, 16 Apr 2009 15:37:03 +1000 (EST) Received: from d23relay01.au.ibm.com (d23relay01.au.ibm.com [202.81.31.243]) by e23smtp01.au.ibm.com (8.13.1/8.13.1) with ESMTP id n3G5aRbn017389 for ; Thu, 16 Apr 2009 15:36:27 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay01.au.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n3G5atW1287046 for ; Thu, 16 Apr 2009 15:37:00 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n3G5as6H021090 for ; Thu, 16 Apr 2009 15:36:54 +1000 Message-ID: <49E6C3F4.4080801@in.ibm.com> Date: Thu, 16 Apr 2009 11:06:52 +0530 From: Sachin Sant MIME-Version: 1.0 To: linuxppc-dev@ozlabs.org Subject: Re: [ppc64] 2.6.29-git7 : offlining a cpu causes an exception References: <49D1E21E.3090505@in.ibm.com> <1238539469.17330.70.camel@pasglop> <49D30C48.4090902@in.ibm.com> <49D3547E.8030200@in.ibm.com> In-Reply-To: <49D3547E.8030200@in.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sachin Sant wrote: > Sachin Sant wrote: >> Benjamin Herrenschmidt wrote: >>> On Tue, 2009-03-31 at 14:57 +0530, Sachin Sant wrote: >>> >>>> While executing CPU HotPlug[1] tests i observed that during >>>> every cpu offline process an exception is thrown. >>>> >>> >>> Looks like a BUG_ON() to me... can you look at what other >>> messages just before that ? >> > Ben, seems like the following patch is causing the cpu hotplug > test failure. > [PATCH 6/6] powerpc/mm: Introduce early_init_mmu() on 64-bit > > http://ozlabs.org/pipermail/linuxppc-dev/2009-March/069613.html > > If i back out this patch, i am able to offline/online cpu's > without any issue. I can recreate this problem with 2.6.30-rc2-git1 as well. Same BUG_ON while running cpu hotplug tests. Let me know if there is any thing i can help to find a fix for this. Thanks -Sachin -- --------------------------------- Sachin Sant IBM Linux Technology Center India Systems and Technology Labs Bangalore, India ---------------------------------