linux-toradex.git/kernel/sched/debug.c, branch v5.3-rc6

Merge tag 'v5.2-rc6' into sched/core, to refresh the branch

2019-06-24T17:19:53+00:00

Signed-off-by: Ingo Molnar

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Kate Stewart 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman

sched/core: Remove sd->*_idx

2019-06-03T09:49:40+00:00

The sched domain per rq load index files also disappear from the
/proc/sys/kernel/sched_domain/cpuX/domainY directories.

Signed-off-by: Dietmar Eggemann 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Rik van Riel 
Cc: Frederic Weisbecker 
Cc: Linus Torvalds 
Cc: Morten Rasmussen 
Cc: Patrick Bellasi 
Cc: Peter Zijlstra 
Cc: Quentin Perret 
Cc: Thomas Gleixner 
Cc: Valentin Schneider 
Cc: Vincent Guittot 
Link: https://lkml.kernel.org/r/20190527062116.11512-6-dietmar.eggemann@arm.com
Signed-off-by: Ingo Molnar

sched/core: Remove rq->cpu_load[]

2019-06-03T09:49:40+00:00

The per rq load array values also disappear from the cpu#X sections in
/proc/sched_debug.

Signed-off-by: Dietmar Eggemann 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Rik van Riel 
Cc: Frederic Weisbecker 
Cc: Linus Torvalds 
Cc: Morten Rasmussen 
Cc: Patrick Bellasi 
Cc: Peter Zijlstra 
Cc: Quentin Perret 
Cc: Thomas Gleixner 
Cc: Valentin Schneider 
Cc: Vincent Guittot 
Link: https://lkml.kernel.org/r/20190527062116.11512-5-dietmar.eggemann@arm.com
Signed-off-by: Ingo Molnar

sched/debug: Remove sd->*_idx range on sysctl

2019-06-03T09:49:39+00:00

This reverts:

  commit 201c373e8e48 ("sched/debug: Limit sd->*_idx range on sysctl")

Load indexes (sd->*_idx) are no longer needed without rq->cpu_load[].
The range check for load indexes can be removed as well. Get rid of it
before the rq->cpu_load[] since it uses CPU_LOAD_IDX_MAX.

At the same time, fix the following coding style issues detected by
scripts/checkpatch.pl:

  ERROR: space prohibited before that ','
  ERROR: space prohibited before that close parenthesis ')'

Signed-off-by: Dietmar Eggemann 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Rik van Riel 
Cc: Frederic Weisbecker 
Cc: Linus Torvalds 
Cc: Morten Rasmussen 
Cc: Patrick Bellasi 
Cc: Peter Zijlstra 
Cc: Quentin Perret 
Cc: Thomas Gleixner 
Cc: Valentin Schneider 
Cc: Vincent Guittot 
Link: https://lkml.kernel.org/r/20190527062116.11512-4-dietmar.eggemann@arm.com
Signed-off-by: Ingo Molnar

sched/fair: Remove rq->load

2019-06-03T09:49:37+00:00

The CFS class is the only one maintaining and using the CPU wide load
(rq->load(.weight)). The last use case of the CPU wide load in CFS's
set_next_entity() can be replaced by using the load of the CFS class
(rq->cfs.load(.weight)) instead.

Signed-off-by: Dietmar Eggemann 
Signed-off-by: Peter Zijlstra (Intel) 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: https://lkml.kernel.org/r/20190424084556.604-1-dietmar.eggemann@arm.com
Signed-off-by: Ingo Molnar

sched/debug: Fix spelling mistake "logaritmic" -> "logarithmic"

2019-04-19T19:04:49+00:00

Signed-off-by: Colin Ian King 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: kernel-janitors@vger.kernel.org
Link: http://lkml.kernel.org/r/20181128152350.13622-1-colin.king@canonical.com
Signed-off-by: Ingo Molnar

sched/debug: Initialize sd_sysctl_cpus if !CONFIG_CPUMASK_OFFSTACK

2019-02-04T08:13:21+00:00

register_sched_domain_sysctl() copies the cpu_possible_mask into
sd_sysctl_cpus, but only if sd_sysctl_cpus hasn't already been
allocated (ie, CONFIG_CPUMASK_OFFSTACK is set).  However, when
CONFIG_CPUMASK_OFFSTACK is not set, sd_sysctl_cpus is left
uninitialized (all zeroes) and the kernel may fail to initialize
sched_domain sysctl entries for all possible CPUs.

This is visible to the user if the kernel is booted with maxcpus=n, or
if ACPI tables have been modified to leave CPUs offline, and then
checking for missing /proc/sys/kernel/sched_domain/cpu* entries.

Fix this by separating the allocation and initialization, and adding a
flag to initialize the possible CPU entries while system booting only.

Tested-by: Syuuichirou Ishii 
Tested-by: Tarumizu, Kohei 
Signed-off-by: Hidetoshi Seto 
Signed-off-by: Peter Zijlstra (Intel) 
Reviewed-by: Masayoshi Mizuma 
Acked-by: Joe Lawrence 
Cc: Linus Torvalds 
Cc: Masayoshi Mizuma 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: https://lkml.kernel.org/r/20190129151245.5073-1-msys.mizuma@gmail.com
Signed-off-by: Ingo Molnar

jump_label: move 'asm goto' support test to Kconfig

2019-01-06T00:46:51+00:00

Currently, CONFIG_JUMP_LABEL just means "I _want_ to use jump label".

The jump label is controlled by HAVE_JUMP_LABEL, which is defined
like this:

  #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL)
  # define HAVE_JUMP_LABEL
  #endif

We can improve this by testing 'asm goto' support in Kconfig, then
make JUMP_LABEL depend on CC_HAS_ASM_GOTO.

Ugly #ifdef HAVE_JUMP_LABEL will go away, and CONFIG_JUMP_LABEL will
match to the real kernel capability.

Signed-off-by: Masahiro Yamada 
Acked-by: Michael Ellerman  (powerpc)
Tested-by: Sedat Dilek

sched/core: Create task_has_idle_policy() helper

2018-11-12T05:17:52+00:00

We already have task_has_rt_policy() and task_has_dl_policy() helpers,
create task_has_idle_policy() as well and update sched core to start
using it.

While at it, use task_has_dl_policy() at one more place.

Signed-off-by: Viresh Kumar 
Signed-off-by: Peter Zijlstra (Intel) 
Acked-by: Daniel Lezcano 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: Vincent Guittot 
Link: http://lkml.kernel.org/r/ce3915d5b490fc81af926a3b6bfb775e7188e005.1541416894.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar