linux-kernel - Re: [tip:sched/fifo 44/45] ERROR: modpost: "sched

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Date:   Tue, 21 Jul 2020 10:36:43 +0200
From:   peterz@...radead.org
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     kernel test robot <lkp@...el.com>, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        Ingo Molnar <mingo@...nel.org>, sfr@...b.auug.org.au
Subject: Re: [tip:sched/fifo 44/45] ERROR: modpost: "sched_setscheduler"
 undefined!

On Mon, Jul 20, 2020 at 06:19:43PM -0400, Steven Rostedt wrote:
> On Mon, 20 Jul 2020 23:49:18 +0200
> Peter Zijlstra <peterz@...radead.org> wrote:
> 
> > Steve, would this work for you, or would you prefer renaming the
> > parameters as well?
> > 
> 
> Yeah, that's fine. You don't have any sched_fifo_high() ?

Thanks! and no.

I'll go write a Changelog and add it to tip/sched/fifo, so that
hopefully, sfr can stop complaining about this build fail ;-)

I've even argued we should rename fifo_low() to something else, but
failed to come up with a sensible name. The intended case is for when
you want something above normal but don't particularly care about RT at
all.

The thing is, once you start adding priorities, even low,med,high, we're
back to where we were. And the whole argument is that the kernel cannot
set priorities in any sensible fashion.