linux-kernel - Re: [PATCH 0/6] sched/deadline, (rt): Sched class cleanups

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Date:   Fri, 4 Mar 2022 12:39:15 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Juri Lelli <juri.lelli@...hat.com>
Cc:     Dietmar Eggemann <dietmar.eggemann@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Mel Gorman <mgorman@...e.de>, Ben Segall <bsegall@...gle.com>,
        Luca Abeni <luca.abeni@...tannapisa.it>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/6] sched/deadline, (rt): Sched class cleanups

On Fri, Mar 04, 2022 at 10:21:49AM +0100, Juri Lelli wrote:
> Hi,
> 
> On 02/03/22 19:34, Dietmar Eggemann wrote:
> > While trying to improve the Deadline sched class behaviour for
> > asymmetric CPU capacity systems I came across some possible
> > cleanups for DL (and RT).
> > 
> > Overview:
> > 
> > [PATCH 1/6] - Remove `struct dl_bandwidth def_dl_bandwidth`.
> > 
> > [PATCH 2/6] - Move functions into DL sched class which don't have to
> >               be exported.
> > 
> > [PATCH 3/6] - Merge two DL admission control functions which provide
> >               very similar functionality.
> > 
> > [PATCH 4/6] - Use DL rb_entry() macros and cached rbtree wrapper
> >               `rb_first_cached()` consistently.
> > 
> > [PATCH 5/6] - Remove unused !CONFIG_SMP function definitions in DL/RT.
> > 
> > [PATCH 6/6] - Remove redundant function parameter in DL/RT.
> > 
> > Dietmar Eggemann (6):
> >   sched/deadline: Remove unused def_dl_bandwidth
> >   sched/deadline: Move bandwidth mgmt and reclaim functions into sched
> >     class source file
> >   sched/deadline: Merge dl_task_can_attach() and dl_cpu_busy()
> >   sched/deadline: Use __node_2_[pdl|dle]() and rb_first_cached()
> >     consistently
> >   sched/deadline,rt: Remove unused functions for !CONFIG_SMP
> >   sched/deadline,rt: Remove unused parameter from
> >     pick_next_[rt|dl]_entity()
> > 
> >  kernel/sched/core.c     |  14 ++--
> >  kernel/sched/deadline.c | 141 ++++++++++++++++++++--------------------
> >  kernel/sched/rt.c       |  16 +----
> >  kernel/sched/sched.h    |  53 +--------------
> >  4 files changed, 84 insertions(+), 140 deletions(-)
> 
> These look ok to me. Thanks for the cleanups!
> 
> Acked-by: Juri Lelli <juri.lelli@...hat.com>

Thanks!