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Re: [Xen-devel] [PATCH RFC V2 02/45] xen/sched: use new sched_item instead of vcpu in scheduler interfaces
- To: George Dunlap <george.dunlap@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Juergen Gross <jgross@xxxxxxxx>
- Date: Thu, 9 May 2019 07:36:10 +0200
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- Cc: Tim Deegan <tim@xxxxxxx>, 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>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, Robert VanVossen <robert.vanvossen@xxxxxxxxxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Josh Whitehead <josh.whitehead@xxxxxxxxxxxxxxx>, Meng Xu <mengxu@xxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
- Delivery-date: Thu, 09 May 2019 05:36:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 08/05/2019 18:35, George Dunlap wrote:
> On 5/6/19 7:56 AM, Juergen Gross wrote:
>> In order to prepare core- and socket-scheduling use a new struct
>> sched_item instead of struct vcpu for interfaces of the different
>> schedulers.
>>
>> Rename the per-scheduler functions insert_vcpu and remove_vcpu to
>> insert_item and remove_item to reflect the change of the parameter.
>> In the schedulers rename local functions switched to sched_item, too.
>>
>> For now this new struct will contain a vcpu pointer only and is
>> allocated on the stack. This will be changed later.
>>
>> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
>
> Oy, I realize this comment is going to be somewhat painful, but...
I hope I didn't scream out too loud... ;-)
> 'item' really seems like the wrong word here. To me 'item' always means
> one thing; whereas what you're planning on doing is grouping together
> vcpus to schedule together; which would mean "unit" (as in, a military
> unit).
>
> I realize changing it here probably means also changing it in the next
> 43 patches as well.
Only about 1000 lines to change.
TBH, replacing "item" with "unit" is doable via sed. Doing the same with
(as Dario suggested) "entity" is more painful, as I would need to check
coding style (line length, indentation) manually afterwards. So Dario,
would you be fine with "unit"? This might save me some hours of work.
Juergen
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