From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758578Ab3JKPsg (ORCPT ); Fri, 11 Oct 2013 11:48:36 -0400 Received: from cavan.codon.org.uk ([93.93.128.6]:43695 "EHLO cavan.codon.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758073Ab3JKPse (ORCPT ); Fri, 11 Oct 2013 11:48:34 -0400 Date: Fri, 11 Oct 2013 16:48:05 +0100 From: Matthew Garrett To: Vivek Goyal Cc: Daniel Kiper , ebiederm@xmission.com, hbabu@us.ibm.com, hpa@linux.intel.com, keescook@chromium.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, david.vrabel@citrix.com, jbeulich@suse.com, keir@xen.org, xen-devel@lists.xen.org Subject: Re: kexec: Clearing registers just before jumping into purgatory Message-ID: <20131011154805.GB30181@srcf.ucam.org> References: <20131011092837.GZ3626@debian70-amd64.local.net-space.pl> <877gdkce6s.fsf@tw-ebiederman.twitter.com> <20131011110455.GA3626@debian70-amd64.local.net-space.pl> <20131011125206.GA2772@redhat.com> <20131011153727.GA30181@srcf.ucam.org> <20131011154450.GB2772@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131011154450.GB2772@redhat.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: mjg59@cavan.codon.org.uk X-SA-Exim-Scanned: No (on cavan.codon.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 11, 2013 at 11:44:50AM -0400, Vivek Goyal wrote: > Just Curious. How is it useful. IOW, what's your use case of booting a new > kernel and then jumping back. I'm kexecing into a kernel with a modified /dev/mem, modifying the original kernel and then jumping back into it. -- Matthew Garrett | mjg59@srcf.ucam.org