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Re: [Xen-devel] Xen 4.11.1: guest uses altp2m to crash host


  • To: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Thu, 25 Apr 2019 13:53:19 +0100
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  • Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Thu, 25 Apr 2019 12:53:33 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 25/04/2019 13:17, Razvan Cojocaru wrote:
> On 4/25/19 1:04 PM, Jan Beulich wrote:
>>>>> On 15.04.19 at 16:10, <rcojocaru@xxxxxxxxxxxxxxx> wrote:
>>> On 4/15/19 5:04 PM, Matt Leinhos wrote:
>>>> You are correct -- cherry picking that commit into RELEASE-4.11.1 
>>>> addresses the crash. The problem cannot be reproduced on 4.12.
>>>>
>>>> I hope this helps.
>>> Thank you for confirming the fix!
>>>
>>> To the deciders: would it be reasonable to ask patches like this to be 
>>> backported to the future 4.11 release?
>> Well, first of all you can always send a request. And yes, in general
>> I'd consider this reasonable, but I say so without having looked at
>> the actual commit(s) in question.
> Thank you for the answer. This is the commit in question:
>
> http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=1dddfff4c39d3db17dfa709b1c57f44e3ed352e3;hp=68465944c81fa2fbc40bf29ec6084072af5e48ec
>
> AFAICT there's nothing controversial about it, and it should easily
> apply to 4.11, so if possible I propose that we consider backporting it
> to the next 4.11 release.

I have a rather large number of altp2m backports to Xen 4.11 in the
XenServer patchqueue, which in practice

It would certainly make my life easier if they were to go upstream.  I
can put together a branch if that would be helpful.

~Andrew

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