From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760954AbZBLWN2 (ORCPT ); Thu, 12 Feb 2009 17:13:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750764AbZBLWNU (ORCPT ); Thu, 12 Feb 2009 17:13:20 -0500 Received: from out01.mta.xmission.com ([166.70.13.231]:50972 "EHLO out01.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753455AbZBLWNT (ORCPT ); Thu, 12 Feb 2009 17:13:19 -0500 To: Andrew Morton Cc: fweisbec@gmail.com, mingo@elte.hu, linux-kernel@vger.kernel.org, oleg@redhat.com, travis@sgi.com, a.p.zijlstra@chello.nl, mm-commits@vger.kernel.org, rusty@rustcorp.com.au Subject: Re: + work_on_cpu-rewrite-it-to-create-a-kernel-thread-on-demand.patch added to -mm tree References: <200902031058.n13AwOoK016719@imap1.linux-foundation.org> <20090203121147.GB19979@elte.hu> <20090203112529.26e6bf76.akpm@linux-foundation.org> <20090212124835.2fc41620.akpm@linux-foundation.org> From: ebiederm@xmission.com (Eric W. Biederman) Date: Thu, 12 Feb 2009 14:13:06 -0800 In-Reply-To: (Eric W. Biederman's message of "Thu\, 12 Feb 2009 14\:08\:09 -0800") Message-ID: User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-XM-SPF: eid=;;;mid=;;;hst=in01.mta.xmission.com;;;ip=67.169.126.145;;;frm=ebiederm@xmission.com;;;spf=neutral X-SA-Exim-Connect-IP: 67.169.126.145 X-SA-Exim-Rcpt-To: akpm@linux-foundation.org, rusty@rustcorp.com.au, mm-commits@vger.kernel.org, a.p.zijlstra@chello.nl, travis@sgi.com, oleg@redhat.com, linux-kernel@vger.kernel.org, mingo@elte.hu, fweisbec@gmail.com X-SA-Exim-Mail-From: ebiederm@xmission.com X-SA-Exim-Version: 4.2.1 (built Thu, 25 Oct 2007 00:26:12 +0000) X-SA-Exim-Scanned: No (on in01.mta.xmission.com); Unknown failure Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I should follow up and say that the reason I care right now, is I am digging into pci hotplug. One of the issues I'm fighting is that currently I appear to need a dedicated kernel thread for each pci hotplug slot. It gets easy to deadlock the kernel hotplugging a hotplug controller otherwise. Eric