linux-kernel - [PATCH v4 0/3] sched: Get rid of select_task_rq()'s sd

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Date:   Mon,  2 Nov 2020 18:45:11 +0000
From:   Valentin Schneider <valentin.schneider@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Daniel Bristot de Oliveira <bristot@...hat.com>
Subject: [PATCH v4 0/3] sched: Get rid of select_task_rq()'s sd_flag parameter

Hi folks,

This is v4 of that one series I've had stashed for a while [1]. I haven't
revisited the outstanding discussion bits, the most interesting part being that
we could get rid of the for_each_domain() loop in select_task_rq_fair() (or at
the very least simplify it). In any case, the first few patches are IMO a decent
cleanup on their own, hence me resubmitting them. 

Links
=====

[1]: https://lore.kernel.org/lkml/20200415210512.805-1-valentin.schneider@arm.com/

Revisions
=========

v3 -> v4
--------
o Dropped want_affine related patches
o Made WF_{TTWU, FORK, EXEC} and SD_BALANCE_{WAKE, FORK, EXEC} share a nibble
  (Peter)

v2 -> v3
--------
o Rebased on top of v5.7-rc1 (didn't re-run performance tests)
o Collected Reviewed-by (Dietmar)
o Updated changelog of 3/9 (Dietmar)

v1 -> v2
--------
o Removed the 'RFC' tag
o Made the sd_flags syctl read-only
o Removed the SD_LOAD_BALANCE flag
o Cleaned up ugly changes thanks to the above

Valentin Schneider (3):
  sched: Add WF_TTWU, WF_EXEC wakeup flags
  sched: Remove select_task_rq()'s sd_flag parameter
  sched/fair: Dissociate wakeup decisions from SD flag value

 kernel/sched/core.c      | 10 +++++-----
 kernel/sched/deadline.c  |  4 ++--
 kernel/sched/fair.c      | 13 +++++++------
 kernel/sched/idle.c      |  2 +-
 kernel/sched/rt.c        |  4 ++--
 kernel/sched/sched.h     | 23 +++++++++++++++--------
 kernel/sched/stop_task.c |  2 +-
 7 files changed, 33 insertions(+), 25 deletions(-)

--
2.27.0