From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964829AbWBTKLf (ORCPT ); Mon, 20 Feb 2006 05:11:35 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964830AbWBTKLf (ORCPT ); Mon, 20 Feb 2006 05:11:35 -0500 Received: from smtp.osdl.org ([65.172.181.4]:44269 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S964829AbWBTKLd (ORCPT ); Mon, 20 Feb 2006 05:11:33 -0500 Date: Mon, 20 Feb 2006 02:09:43 -0800 From: Andrew Morton To: ebiederm@xmission.com (Eric W. Biederman) Cc: arjan@infradead.org, linux-kernel@vger.kernel.org, B.Steinbrink@gmx.de, viro@ftp.linux.org.uk Subject: Re: + daemonize-detach-from-current-namespace.patch added to -mm tree Message-Id: <20060220020943.1d9eac25.akpm@osdl.org> In-Reply-To: References: <200602200438.k1K4ct5n013388@shell0.pdx.osdl.net> <1140425218.2979.14.camel@laptopd505.fenrus.org> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org ebiederm@xmission.com (Eric W. Biederman) wrote: > > I am beginning to suspect that we will want to fix kernel_thread so it > creates copies of the init_task rather than copies of whatever random > user space process we happen to be a member of at the time. With an > enhanced kernel_thread this problem could more easily avoided, as > we add additional namespaces to the kernel. You wouldn't believe the problems we had with kernel_thread followed by call_usermodehelper() due to inheritance of random stuff from the userspace parent. A suitable solution is to stop using kernel_thread(), migrate to the kthread API - that way the threads are parented by keventd which is a known and good environment.