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Re: [PATCH v5 07/11] xen/domctl: Introduce XEN_DOMCTL_CDF_vpci flag

  • To: Bertrand Marquis <Bertrand.Marquis@xxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Wed, 13 Oct 2021 14:57:17 +0200
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  • Cc: Michal Orzel <Michal.Orzel@xxxxxxx>, Rahul Singh <Rahul.Singh@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andre Przywara <Andre.Przywara@xxxxxxx>, Christian Lindig <christian.lindig@xxxxxxxxxx>, David Scott <dave@xxxxxxxxxx>, Ian Jackson <iwj@xxxxxxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • Delivery-date: Wed, 13 Oct 2021 12:57:36 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 13.10.2021 14:11, Bertrand Marquis wrote:
>> On 13 Oct 2021, at 11:56, Roger Pau Monné <roger.pau@xxxxxxxxxx> wrote:
>> If vPCI for Arm on 4.16 is not going to be functional, why so much
>> pressure in pushing those patches so fast? I understand the need to
>> remove stuff from the queue, but I don't think it's worth the cost of
>> introducing a broken interface deliberately on a release.


> We did not push that fast, those have been on the mailing list for a while 
> (this is the 5th version of the serie).
> PCI passthrough is a big change requiring lots of patches and we decided to 
> push it piece by piece to make
> the review easier.

5 versions for a series like this one was to be expected. Imo it has
been wrong in the past to rush in new features (even if experimental
ones) very close to the freeze, and it has mislead people to think
they can delay work until very (too?) late a point in time.

In fact I'm getting somewhat angry seeing how much effort is put into
getting this work in (including myself doing reviews there), when at
the same time far older series of mine aren't given any chance to
make any progress. Not your fault, sure, but an observation.




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