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Date: Fri, 9 Feb 2018 18:17:29 +0100
From: Greg KH <gregkh@linuxfoundation.org>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: stable@vger.kernel.org, nikola.ciprich@linuxbox.cz,
        Haozhong Zhang <haozhong.zhang@intel.com>
Subject: Re: [PATCH] KVM MMU: check pending exception before injecting APF
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On Fri, Feb 09, 2018 at 06:00:42PM +0100, Paolo Bonzini wrote:
> From: Haozhong Zhang <haozhong.zhang@intel.com>
> 
> [ upstream commit 2a266f23550be997d783f27e704b9b40c4010292 Mon Sep 17 00:00:00 2001 ]

Odd date :)

> 
> For example, when two APF's for page ready happen after one exit and
> the first one becomes pending, the second one will result in #DF.
> Instead, just handle the second page fault synchronously.
> 
> Reported-by: Ross Zwisler <zwisler@gmail.com>
> Message-ID: <CAOxpaSUBf8QoOZQ1p4KfUp0jq76OKfGY4Uxs-Gg8ngReD99xww@mail.gmail.com>
> Reported-by: Alec Blayne <ab@tevsa.net>
> Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
> Fixes: 664f8e26b00c7673a8303b0d40853a0c24ca93e1

So this is only needed for 4.14.y?

thanks,

greg k-h