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Date:   Tue, 27 Sep 2022 15:04:39 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Joel Fernandes <joel@joelfernandes.org>
Cc:     Ricardo Neri <ricardo.neri-calderon@linux.intel.com>,
        Juri Lelli <juri.lelli@redhat.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Ricardo Neri <ricardo.neri@intel.com>,
        "Ravi V. Shankar" <ravi.v.shankar@intel.com>,
        Ben Segall <bsegall@google.com>,
        Daniel Bristot de Oliveira <bristot@redhat.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Len Brown <len.brown@intel.com>, Mel Gorman <mgorman@suse.de>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        Valentin Schneider <vschneid@redhat.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org, "Tim C . Chen" <tim.c.chen@intel.com>
Subject: Re: [RFC PATCH 03/23] sched/core: Initialize the class of a new task
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On Mon, Sep 26, 2022 at 02:57:29PM +0000, Joel Fernandes wrote:

> > +#ifdef CONFIG_SCHED_TASK_CLASSES
> > +	p->class			= TASK_CLASS_UNCLASSIFIED;
> > +#endif
> 
> I find the term 'class' very broad and unclear what kind of class (without
> further reading). So I am worried about how this generic term usage plays
> with Linux source code in the long-term (like what if someone else comes up
> with a usage of term 'class' that is unrelated to IPC.)

However much I like making a pain for people using C++ to compile the
kernel, I do think ipcc might be better here
(instructions_per_cycle_class for those of the novel per identifier
school of thought).

> To that end, I was wondering if it could be renamed to p->ipc_class, and
> CONFIG_SCHED_TASK_IPC_CLASSES, or something.

Can we *please* shorten those thing instead of writing a novel?
CONFIG_SCHED_IPC_CLASS works just as well, no? Or TASK_IPC, whatever.