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Date: Thu, 28 Feb 2013 11:27:23 -0500
From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
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To: Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Greg KH <gregkh@linuxfoundation.org>, mingo@redhat.com,
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        linux-kernel@vger.kernel.org, samu.kallio@aberdeencloud.com,
        kraman@redhat.com, jwboyer@redhat.com
Subject: Re: Is: x86: mm: Fix vmalloc_fault oops during lazy MMU updates Was:
 Re: [PATCH] mm/x86: Flush lazy MMU when DEBUG_PAGEALLOC is set
References: <91983d94-7b7d-4a0b-9470-e7cd823ba139@default> <512E8B41.8000504@zytor.com> <20130227230009.GA32465@kroah.com> <512E91B7.6060102@zytor.com> <20130228142910.GA32354@phenom.dumpdata.com> <20130228153846.GA9782@pd.tnic> <512F7D88.4090703@zytor.com> <20130228161057.GC9767@pd.tnic> <512F83C4.6080904@oracle.com> <20130228162227.GD9767@pd.tnic>
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On 02/28/2013 11:22 AM, Borislav Petkov wrote:
> On Thu, Feb 28, 2013 at 11:20:20AM -0500, Boris Ostrovsky wrote:
>> On 02/28/2013 11:10 AM, Borislav Petkov wrote:
>>> On Thu, Feb 28, 2013 at 07:53:44AM -0800, H. Peter Anvin wrote:
>>>> At the very least we should have an early filter for the **COMMON!**
>>>> case that we are not on a PV platform.
>>> ... or, patch it out with the alternatives on baremetal, as Steven
>>> suggested.

What was the suggestion exactly? I don't remember seeing that message.

-boris

>>>
>> I think making a check for paravirt_enabled() is safe enough. I'll
>> send a patch shortly.
> Why not make it absolutely for free?
>