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Re: [Xen-devel] Xen 4.11.1: guest uses altp2m to crash host
- To: <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Thu, 25 Apr 2019 14:05:36 +0100
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- Delivery-date: Thu, 25 Apr 2019 13:07:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 25/04/2019 13:58, Jan Beulich wrote:
>>>> On 25.04.19 at 14:53, <andrew.cooper3@xxxxxxxxxx> wrote:
>> 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=1dddfff4c39d3db17dfa7
>>
>> 09b1c57f44e3ed352e3;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
> ... ???
Oops sorry "in practice brings it in line with Xen 4.12."
>
>> It would certainly make my life easier if they were to go upstream. I
>> can put together a branch if that would be helpful.
> What volume / count are we talking about? Anyway, if it's really
> mostly altp2m code that gets touched, I don't mind, and having a
> branch to pull from would be helpful.
Looks like 20 fixes or so.
> 4.11.2 is going to be delayed
> anyway at least until the master branch advances again, as I've
> meanwhile queued up quite a few bug fixes which all sit behind the
> push gate there.
Looking through the patchqueue, there are also some other fixes which
definitely qualify. Given the current blockages, I'll wait until things
are open and flowing again, and highlight any further fixes.
~Andrew
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