linux-kernel - Re: [PATCH resend 2/8] sched: core scheduling tagging infrastructure

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Message-ID: <CABk29NuHgtZdMb8usEk+ZELe8PaVejpJuhuR4DHaN-VmjJ=7eQ@mail.gmail.com>
Date:   Tue, 30 Mar 2021 14:29:06 -0700
From:   Josh Don <joshdon@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Nishanth Aravamudan <naravamudan@...italocean.com>,
        Julien Desfossez <jdesfossez@...italocean.com>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Vineeth Pillai <viremana@...ux.microsoft.com>,
        Aaron Lu <aaron.lwe@...il.com>,
        Aubrey Li <aubrey.intel@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>, torvalds@...ux-foundation.org,
        fweisbec@...il.com, Kees Cook <keescook@...omium.org>,
        Phil Auld <pauld@...hat.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        Paolo Bonzini <pbonzini@...hat.com>, vineeth@...byteword.org,
        Chen Yu <yu.c.chen@...el.com>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Agata Gruza <agata.gruza@...el.com>,
        Antonio Gomez Iglesias <antonio.gomez.iglesias@...el.com>,
        graf@...zon.com, konrad.wilk@...cle.com, dfaggioli@...e.com,
        Steven Rostedt <rostedt@...dmis.org>, benbjiang@...cent.com,
        Alexandre Chartre <alexandre.chartre@...cle.com>,
        James.Bottomley@...senpartnership.com, OWeisse@...ch.edu,
        Dhaval Giani <dhaval.giani@...cle.com>,
        "Hyser,Chris" <chris.hyser@...cle.com>,
        Hao Luo <haoluo@...gle.com>,
        Tom Lendacky <thomas.lendacky@....com>, dhiatt@...italocean.com
Subject: Re: [PATCH resend 2/8] sched: core scheduling tagging infrastructure

On Mon, Mar 29, 2021 at 2:55 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> OK, fixed the fails. My tired head made it unconditionally return the
> cookie-id of 'current' instead of task. Pushed out an update.

I see you have the per-task and prctl stuff pulled into your tree. I
can rebase the compound cookie and cgroup api patches on top if you'd
like; not sure if you've already re-ordered it locally. Any other
comments on the former?

> > > Also, we really need a better name than coretag.c.
> >
> > Yea, we don't really otherwise use the phrase "tagging". core_sched.c
> > is probably too confusing given we have sched/core.c.
>
> Right, so I tried core_sched and my fingers already hate it as much as
> kernel/scftorture.c (which I'd assumed my fingers would get used to
> eventually, but noooo).
>
> Looking at kernel/sched/ C is very overrepresented, so we really don't
> want another I think. B, E, G, H, J, K, N, seem to still be available in
> the first half of the alphabet. Maybe, bonghits.c, gabbleduck.c ?

hardware_vuln.c? Tricky to avoid a C with cpu, core, and cookie :)