Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755832AbYBKUPc (ORCPT ); Mon, 11 Feb 2008 15:15:32 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757993AbYBKUPF (ORCPT ); Mon, 11 Feb 2008 15:15:05 -0500 Received: from smtp2.linux-foundation.org ([207.189.120.14]:52546 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753266AbYBKUPD (ORCPT ); Mon, 11 Feb 2008 15:15:03 -0500 Date: Mon, 11 Feb 2008 11:48:18 -0800 From: Andrew Morton To: Badari Pulavarty Cc: linux-kernel@vger.kernel.org, greg@kroah.com, haveblue@us.ibm.com, linux-mm@kvack.org Subject: Re: [-mm PATCH] register_memory/unregister_memory clean ups Message-Id: <20080211114818.74c9dcc7.akpm@linux-foundation.org> In-Reply-To: <1202750598.25604.3.camel@dyn9047017100.beaverton.ibm.com> References: <1202750598.25604.3.camel@dyn9047017100.beaverton.ibm.com> X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.20; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1395 Lines: 42 On Mon, 11 Feb 2008 09:23:18 -0800 Badari Pulavarty wrote: > Hi Andrew, > > While testing hotplug memory remove against -mm, I noticed > that unregister_memory() is not cleaning up /sysfs entries > correctly. It also de-references structures after destroying > them (luckily in the code which never gets used). So, I cleaned > up the code and fixed the extra reference issue. > > Could you please include it in -mm ? > > Thanks, > Badari > > register_memory()/unregister_memory() never gets called with > "root". unregister_memory() is accessing kobject_name of > the object just freed up. Since no one uses the code, > lets take the code out. And also, make register_memory() static. > > Another bug fix - before calling unregister_memory() > remove_memory_block() gets a ref on kobject. unregister_memory() > need to drop that ref before calling sysdev_unregister(). > I'd say this: > Subject: [-mm PATCH] register_memory/unregister_memory clean ups is rather tame. These are more than cleanups! These sound like machine-crashing bugs. Do they crash machines? How come nobody noticed it? All very strange... -- 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/