Re: [PATCH v2 2/2] perf pmu: Improve CPU core PMU HW event list ordering

[John Garry]

On 03/08/2020 13:54, Arnaldo Carvalho de Melo wrote:
> > git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
> >
> > Please let me know - it would be useful for any dev during the merge window.
> So, I'm now pushing things directly to Linus, but just the tooling part,
> the branch to do development on is:
>
>    git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git perf/core
>
> At some point I think we'll have a git/perf-tools/perf-tools.git, just
> like tip, but for now, please use the one above.
>
> My perf/core in the past was rebaseable, I did changes in it after
> publishing, trying to have solid bisectability, since I process patch by
> patch doing tests on it when we noticed problems, prior to pushing to
> Ingo for tip.
>
> Now I am making perf/core non-rebaseable, I push things there
> periodically, tagging what is there with the test results, see:
>
>    https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tag/?h=perf-tools-tests-2020-07-17
>    https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git/tag/?h=perf-tools-tests-2020-07-02
>
> I'll try and tag today's state of that tree, which I did tests already
> but since v5.8 was released, I merged it there and will retest and tag
> the test results.
>
> The tmp.perf/core one is an experiment in making what I have in my local
> tree available for more bleeding edge things that are being done, say in
> that metrics effort, etc, but I think I'll stop that, since, as your
> message shows, it is causing confusion.
>
> I did this because these tests take quite some time and sometimes I have
> to fix things and restart it, rinse, repeat.
>
> So please use:
>
>    git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git perf/core

If it makes sense, it could be useful to have this included in the 
MAINTAINERS file. That's for forgetful people like me :)

> I'll further automate all this so that we have a more regular cadence of
> updates to perf/core, say every two days or so.
>
> If you have changes that touch both the kernel and userspace, the kernel
> bits need to go via tip, the tooling via the perf tree, that for now
> (well, it has been like that for quite a long time) is my tree.

ok, thanks for the detailed response.

> Arch specific kernel bits have been going via the arch trees for quite a
> while, I think.
>
> - Arnaldo
> .

Cheers,
john