From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: [PATCH 2/4] x86,xen: introduce x86_init.mapping.pagetable_reserve Date: Mon, 18 Apr 2011 07:42:55 -0700 Message-ID: <4DAC4DEF.3090200@zytor.com> References: <1302607192-21355-2-git-send-email-stefano.stabellini@eu.citrix.com> <4DA5EAE4.2060406@linux.intel.com> <4DA70A4A.4030805@zytor.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: Stefano Stabellini Cc: "H. Peter Anvin" , "linux-kernel@vger.kernel.org" , "xen-devel@lists.xensource.com" , "konrad.wilk@oracle.com" , "jeremy@goop.org" , "yinghai@kernel.org" , "mingo@elte.hu" List-Id: xen-devel@lists.xenproject.org On 04/18/2011 07:09 AM, Stefano Stabellini wrote: > > Sorry, I don't mean to be pushy, it is just that I'll be AFK for 12 days > starting from next Friday and I think that this issue should really be > fixed in time for the 2.6.39 release, otherwise no 2.6.39 kernels will > be able to boot on any xen system. YOU STILL HAVEN'T PROPOSED ANY SEMANTICS. The semantics of a hook is a description of what the preconditions are, what the postconditions are, and what exactly they are allowed or not allowed to do. This is a real pain to do, *exactly because hooks are a real pain*. Most hooks that have been put in has been "oh, just do something at point X in the code", which is a case of definition by implementation, which is exactly how we ended up with the current mess. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.