From: "H. Peter Anvin" <hpa@zytor.com>
To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: "H. Peter Anvin" <hpa@linux.intel.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
"jeremy@goop.org" <jeremy@goop.org>,
"yinghai@kernel.org" <yinghai@kernel.org>,
"mingo@elte.hu" <mingo@elte.hu>
Subject: Re: [PATCH 2/4] x86,xen: introduce x86_init.mapping.pagetable_reserve
Date: Mon, 18 Apr 2011 07:42:55 -0700 [thread overview]
Message-ID: <4DAC4DEF.3090200@zytor.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1104181507180.10886@kaball-desktop>
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.
next prev parent reply other threads:[~2011-04-18 14:43 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-12 11:16 [PATCH 0/4] xen: critical bug fixes for 2.6.39-rc3 Stefano Stabellini
2011-04-12 11:16 ` Stefano Stabellini
2011-04-12 11:19 ` [PATCH 1/4] xen: mask_rw_pte mark RO all pagetable pages up to pgt_buf_top stefano.stabellini
2011-04-12 16:47 ` Konrad Rzeszutek Wilk
2011-04-12 16:47 ` Konrad Rzeszutek Wilk
2011-04-13 10:24 ` Stefano Stabellini
2011-04-12 11:19 ` [PATCH 2/4] x86,xen: introduce x86_init.mapping.pagetable_reserve stefano.stabellini
2011-04-12 11:50 ` [Xen-devel] [PATCH 2/4] x86, xen: " Jan Beulich
2011-04-12 11:50 ` Jan Beulich
2011-04-12 17:41 ` Stefano Stabellini
2011-04-12 17:41 ` Stefano Stabellini
2011-04-12 17:40 ` [PATCH 2/4] x86,xen: " Yinghai Lu
2011-04-13 10:35 ` Stefano Stabellini
2011-04-13 10:35 ` Stefano Stabellini
2011-04-13 18:28 ` H. Peter Anvin
2011-04-14 11:05 ` Stefano Stabellini
2011-04-13 18:03 ` Konrad Rzeszutek Wilk
2011-04-13 18:35 ` H. Peter Anvin
2011-04-13 18:35 ` [PATCH 2/4] x86, xen: " H. Peter Anvin
2011-04-13 20:19 ` [PATCH 2/4] x86,xen: " Konrad Rzeszutek Wilk
2011-04-13 18:26 ` H. Peter Anvin
2011-04-14 11:30 ` Stefano Stabellini
2011-04-14 14:49 ` Stefano Stabellini
2011-04-14 14:49 ` Stefano Stabellini
2011-04-14 14:52 ` H. Peter Anvin
2011-04-14 18:09 ` Stefano Stabellini
2011-04-18 14:09 ` Stefano Stabellini
2011-04-18 14:42 ` H. Peter Anvin [this message]
2011-04-18 17:21 ` Stefano Stabellini
2011-04-20 16:50 ` Jeremy Fitzhardinge
2011-04-12 11:19 ` [PATCH 3/4] xen: more debugging in the e820 parsing stefano.stabellini
2011-04-12 16:39 ` Konrad Rzeszutek Wilk
2011-04-13 10:24 ` Stefano Stabellini
2011-04-13 17:54 ` Konrad Rzeszutek Wilk
2011-04-14 10:35 ` Stefano Stabellini
2011-04-12 11:19 ` [PATCH 4/4] xen: do not create the extra e820 region at an addr lower than 4G stefano.stabellini
2011-04-12 16:48 ` Konrad Rzeszutek Wilk
2011-04-12 16:48 ` Konrad Rzeszutek Wilk
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