linux-kernel - Re: [PATCH 3/3] drm/scheduler: Clean up jobs when the scheduler is torn down.

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Date:   Wed, 19 Jul 2023 14:58:32 -0400
From:   Luben Tuikov <luben.tuikov@....com>
To:     Konstantin Ryabitsev <konstantin.ryabitsev@...ux.dev>,
        Asahi Lina <lina@...hilina.net>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>
Cc:     Faith Ekstrand <faith.ekstrand@...labora.com>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        asahi@...ts.linux.dev, Alyssa Rosenzweig <alyssa@...enzweig.io>,
        linux-media@...r.kernel.org
Subject: Re: [PATCH 3/3] drm/scheduler: Clean up jobs when the scheduler is
 torn down.

On 2023-07-19 14:16, Konstantin Ryabitsev wrote:
> July 18, 2023 at 1:14 AM, "Luben Tuikov" <luben.tuikov@....com> wrote:
>>>> Not sure about other drivers--they can speak for themselves and the CC list
>>>>  should include them--please use "dim add-missing-cc" and make sure
>>>>  that the Git commit description contains the Cc tags--then git send-email
>>>>  will populate the SMTP CC. Feel free to add more Cc tags on top of that.
>>>  
>>>  I use `b4 prep -c` which I think does the same thing? I just ran it 
>>>  again and it only added 'linaro-mm-sig@...ts.linaro.org', not sure why 
>>>  that one wasn't there. Am I missing anything else?
>>
>> Not sure about "b4 prep -c"--using "git send-email" instead, but what is
>> important is to add the Cc: tags as part of the commit message. A "git log" of
>> drm-misc-next shows the proper format. Then maintainers add Link:
>> tag to the correct email thread, which is usually completely automated
>> by "dim" or by "git am", or both.
> 
> It's useful to note here that this is not standard practice across the entirety of the Linux tree. In general, Cc: trailers are added to individual commits when get_maintainer.pl wouldn't otherwise include someone in the recipient list. The "dim" tool mentioned here is specific to the DRM subsystem (the "d" stands for "DRM"). Since both tools work on git series, you can use it alongside b4.
> 

In DRM we use "dim"--it's just how we do things and everyone complies with this.
"dim" also includes the Link: tag (which "git am" can also be made add), and this adds
certain amount of accountability, which is a good thing.

This is why I suggested that a subsequent version of these patches, include
the Cc: tags, which would normally come from "dim add-missing-cc", which uses
"scripts/get_maintainer.pl".

DRM maintainers regularly use `git rebase --exec "dim add-missing-cc" ...'.

> DRM folks, if get_maintainer.pl isn't finding someone who should be included on a series of patches, should the MAINTAINERS file be updated to make it easier to submit valid patches without needing to know of "dim"?
"scripts/get_maintainer.pl" does consult the MAINTAINERS file. There's been no immediate need
to update the MAINTAINERS file.

Sometimes a single function or a single line in a function (as in some kind of complex calculation),
might be coming from someone who doesn't normally commit to the subsystem. This is where "git blame"
and "git log" are helpful to inspect and add a Cc: tag with that email to the commit message, and this
of course depends on the nature of the incoming patch.
-- 
Regards,
Luben