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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 01.10.18 at 12:52, <ian.jackson@xxxxxxxxxx> wrote:
> Olaf Hering writes ("Re: [PATCH v9] new config option vtsc_tolerance_khz to 
> avoid TSC emulation"):
>> Am Thu, 13 Sep 2018 09:39:13 +0200
>> schrieb Olaf Hering <olaf@xxxxxxxxx>:
>> > this patch was not applied yet, even after a few "pings".
>> 
>> No reaction since months.
>> So scrap that patch, just in case it is still part of someones to-consider 
> queue.
> 
> I think it would be worth exploring whether this patch could be
> applied without an explicit ack from Andrew.
> 
> I confess I ignored all the previous mails because they all started
>    Andrew,
> or
>    Andrew, Lars,
> so I assumed that you didn't want attention from other
> maintainers/committers.
> 
> Now that I look at the thread it is difficult for me to see the wood
> for the trees but I don't see unanswered concerns.

Problem is - discussion around this was (iirc) happening not only on
the list, but also on irc (including perhaps private chats). It was for
that reason that I made my R-b conditional upon Andrew at least
giving an informal go-ahead (otherwise, together with Wei's R-b,
the patch could have gone in).

Besides the question of correctness from the perspective of guests
(which imo is not a problem as the feature needs to be actively
enabled, and I think we have no reason to keep admins from
breaking their guests if they really mean to), 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.

Jan



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