linux-kernel - Re: [PATCH] mm/x86: Patch out arch_flush_lazy_mmu

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Date:	Wed, 13 Mar 2013 09:25:44 -0400
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	Josh Boyer <jwboyer@...hat.com>
CC:	"H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
	mingo@...hat.com, tglx@...utronix.de, konrad.wilk@...cle.com,
	rostedt@...dmis.org, gregkh@...uxfoundation.org,
	samu.kallio@...rdeencloud.com, kraman@...hat.com,
	xen-devel@...ts.xen.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] mm/x86: Patch out arch_flush_lazy_mmu_mode() when running
 on bare metal

On 03/01/2013 07:14 AM, Josh Boyer wrote:
> On Thu, Feb 28, 2013 at 04:52:20PM -0800, H. Peter Anvin wrote:
>> On 02/28/2013 04:42 PM, Josh Boyer wrote:
>>> On Fri, Mar 01, 2013 at 01:36:29AM +0100, Borislav Petkov wrote:
>>>> On Thu, Feb 28, 2013 at 04:15:45PM -0800, H. Peter Anvin wrote:
>>>>>> I'll try to get someone to test this tomorrow.
>>>> Btw, you'd need to apply that other patch too
>>>>
>>>> http://marc.info/?l=xen-devel&m=136206183814547&w=2
>>>>
>>>> so that arch_flush_lazy_mmu_mode() has at least one caller on x86_64.
>>> Yeah, we already have that applied.  It stops crashes in xen
>>> environments so we pulled it in as a bugfix.  Thanks though!
>>>
>> Who are "we"?
> Sorry, Fedora.  That patch has a link to a bug in it.  We applied the
> patch for that bug.  I'll apply Boris' patch on top and get the same
> people to test it.

Josh, have you had a chance to test this?

-boris
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