From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757368Ab3JKMwp (ORCPT ); Fri, 11 Oct 2013 08:52:45 -0400 Received: from mx1.redhat.com ([209.132.183.28]:64462 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753631Ab3JKMwn (ORCPT ); Fri, 11 Oct 2013 08:52:43 -0400 Date: Fri, 11 Oct 2013 08:52:06 -0400 From: Vivek Goyal To: Daniel Kiper Cc: 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: <20131011125206.GA2772@redhat.com> References: <20131011092837.GZ3626@debian70-amd64.local.net-space.pl> <877gdkce6s.fsf@tw-ebiederman.twitter.com> <20131011110455.GA3626@debian70-amd64.local.net-space.pl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131011110455.GA3626@debian70-amd64.local.net-space.pl> 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 Fri, Oct 11, 2013 at 01:04:55PM +0200, Daniel Kiper wrote: [..] > > In theory you can swap between to kernels with the preserve_context > > case. Technically I like the ability but I don't know that it has ever > > achieved much uptake. > > I think that this is nice idea too. However, I have not seen its usage in real. > Even once there was an idea to remove that stuff from Linux Kernel. I have not seen anybody using it. I don't even know if it works or not. If nobody is using it, I will advocate removing it. It introduces extra complexity and makes new code changes more difficult. Thanks Vivek