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Date: Wed, 23 Apr 2014 09:56:00 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: Andrew Lutomirski <amluto@gmail.com>,
        "H. Peter Anvin" <hpa@linux.intel.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Ingo Molnar <mingo@kernel.org>,
        Alexander van Heukelum <heukelum@fastmail.fm>,
        Borislav Petkov <bp@alien8.de>,
        Arjan van de Ven <arjan.van.de.ven@intel.com>,
        Brian Gerst <brgerst@gmail.com>,
        Alexandre Julliard <julliard@winehq.com>,
        Andi Kleen <andi@firstfloor.org>, Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH] x86-64: espfix for 64-bit mode *PROTOTYPE*
References: <tip-kicdm89kzw9lldryb1br9od0@git.kernel.org> <1398120472-6190-1-git-send-email-hpa@linux.intel.com> <535714A1.9080502@linux.intel.com> <CAObL_7HsnpGKRoBh+NZkW7SURqGx_4Dkfow=1-_7UU9uBV4UkA@mail.gmail.com> <53571A7D.8050702@zytor.com> <5357CD0B.5050003@oracle.com>
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On 04/23/2014 07:24 AM, Boris Ostrovsky wrote:
>>
>> Konrad - I really could use some help figuring out what needs to be done
>> for this not to break Xen.
> 
> This does break Xen PV:
> 

I know it does.  This is why I asked for help.

This is fundamentally the problem with PV and *especially* the way Xen
PV was integrated into Linux: it acts as a development brake for native
hardware.  Fortunately, Konrad has been quite responsive to that kind of
problems, which hasn't always been true of the Xen community in the past.

	-hpa

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