From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751765Ab1JZTY6 (ORCPT ); Wed, 26 Oct 2011 15:24:58 -0400 Received: from mx1.redhat.com ([209.132.183.28]:22622 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751347Ab1JZTY5 (ORCPT ); Wed, 26 Oct 2011 15:24:57 -0400 Date: Wed, 26 Oct 2011 15:24:49 -0400 From: Vivek Goyal To: Michael Holzheu Cc: "Eric W. Biederman" , schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Kay Sievers Subject: Re: kdump: No udev events for memory hotplug? Message-ID: <20111026192449.GE355@redhat.com> References: <1319645292.3321.24.camel@br98xy6r> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1319645292.3321.24.camel@br98xy6r> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Oct 26, 2011 at 06:08:12PM +0200, Michael Holzheu wrote: > Hello Vivek and Eric, > > I noticed that on my system kernel 3.1 *no* udev events for memory > hotplug are generated. Same on my RHEL6.1. > > # udevadm monitor > # echo offline > /sys/devices/system/memory/memory4/state > > -> No event > > But we need the udev events in order to do a kdump reload for setting up > the ELF loads correctly. > > In my /etc/udev/rules.d/98-kexec.rules there are rules for memory > hotplug: > > SUBSYSTEM=="memory", ACTION=="add", PROGRAM="/etc/init.d/kdump restart" > SUBSYSTEM=="memory", ACTION=="remove", PROGRAM="/etc/init.d/kdump > restart" > > Perhaps/probably I am missing something? I don't know. Sounds like a bug. I have never looked into it. CCing Kay, if he has any thoughts. Are any events generated for memory add? Thanks Vivek