Re: [PATCH] KVM MMU: check pending exception before injecting APF

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On Fri, Feb 09, 2018 at 06:21:13PM +0100, Paolo Bonzini wrote:
> On 09/02/2018 18:17, Greg KH wrote:
> > On Fri, Feb 09, 2018 at 06:00:42PM +0100, Paolo Bonzini wrote:
> >> From: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
> >>
> >> [ upstream commit 2a266f23550be997d783f27e704b9b40c4010292 Mon Sep 17 00:00:00 2001 ]
> > 
> > Odd date :)
> 
> Oops... git's fake mbox "From" line.

Yeah, I guessed, odd it showed up here...

> >> 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@xxxxxxxxx>
> >> Message-ID: <CAOxpaSUBf8QoOZQ1p4KfUp0jq76OKfGY4Uxs-Gg8ngReD99xww@xxxxxxxxxxxxxx>
> >> Reported-by: Alec Blayne <ab@xxxxxxxxx>
> >> Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
> >> Fixes: 664f8e26b00c7673a8303b0d40853a0c24ca93e1
> > 
> > So this is only needed for 4.14.y?
> 
> Yes.  4.13 and 4.15 both work.

Wonderful, I'll queue this up after this round of kernels are released
in a few days.

thanks,

greg k-h



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