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Re: [Xen-devel] [PATCH v9] new config option vtsc_tolerance_khz to avoid TSC emulation


  • To: Jan Beulich <JBeulich@xxxxxxxx>
  • From: George Dunlap <george.dunlap@xxxxxxxxxx>
  • Date: Mon, 1 Oct 2018 15:25:36 +0100
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  • Cc: Lars Kurth <lars.kurth@xxxxxxxxxx>, Olaf Hering <olaf@xxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxx, Julien Grall <julien.grall@xxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxx>
  • Delivery-date: Mon, 01 Oct 2018 14:25:52 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 10/01/2018 03:00 PM, Jan Beulich wrote:
>>>> On 01.10.18 at 15:38, <george.dunlap@xxxxxxxxxx> wrote:
>> On 10/01/2018 12:25 PM, Jan Beulich wrote:
>>> I think the main concern
>>> was with the way migration of the new value was implemented. But I
>>> really have to defer to Andrew for that, irrespective of him not
>>> having responded (on the list) to prior pings.
>>
>> Is Andrew really the only person who knows enough about migration to
>> give this the thumbs-up?
> 
> That's not the point here, at least afaic: He had voiced _some_
> concern on an earlier version. In such a case it is, I think, only
> appropriate to wait with committing until there was indication
> that the concerns were sufficiently addressed (verbally or by
> adjustments to the code).

Right -- but it's not your job to make sure the migration stuff is
properly addressed; it's Wei and Ian's job.  Wei's R-b was a statement
from him that the code was good; when Andy questioned that, I think it
was then *Wei's* job to address the question, not yours or Andy's (or
even Olaf's).  If Wei says, "I've considered Andy's objections and I
think the patch is fine as-is", then it can be checked in (given a
reasonable amount of time for Andy to respond); and Wei can own whatever
consequences there are.

 -George

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