Thomas Gleixner d60585c576 sched/core: Correct off by one bug in load migration calculation ...

The move of calc_load_migrate() from CPU_DEAD to CPU_DYING did not take into
account that the function is now called from a thread running on the outgoing
CPU. As a result a cpu unplug leakes a load of 1 into the global load
accounting mechanism.

Fix it by adjusting for the currently running thread which calls
calc_load_migrate().

Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Cc: rt@linutronix.de
Cc: shreyas@linux.vnet.ibm.com
Fixes: e9cd8fa4fc: ("sched/migration: Move calc_load_migrate() into CPU_DYING")
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1607121744350.4083@nanos
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-07-13 14:58:20 +02:00

..

auto_group.c

…

auto_group.h

…

clock.c

sched/clock: Make local_clock()/cpu_clock() inline

2016-04-13 12:25:22 +02:00

completion.c

…

core.c

sched/core: Correct off by one bug in load migration calculation

2016-07-13 14:58:20 +02:00

cpuacct.c

sched/cpuacct: Check for NULL when using task_pt_regs()

2016-04-13 13:22:37 +02:00

cpuacct.h

…

cpudeadline.c

sched/core: Use tsk_cpus_allowed() instead of accessing ->cpus_allowed

2016-05-12 09:55:35 +02:00

cpudeadline.h

…

cpufreq_schedutil.c

cpufreq: schedutil: Improve prints messages with pr_fmt

2016-05-19 01:02:52 +02:00

cpufreq.c

cpufreq: sched: Helpers to add and remove update_util hooks

2016-04-02 01:08:43 +02:00

cpupri.c

sched/core: Use tsk_cpus_allowed() instead of accessing ->cpus_allowed

2016-05-12 09:55:35 +02:00

cpupri.h

…

cputime.c

…

deadline.c

sched/core: Provide a tsk_nr_cpus_allowed() helper

2016-05-12 09:55:36 +02:00

debug.c

sched/debug: Fix /proc/sched_debug regression

2016-06-08 14:31:58 +02:00

fair.c

sched/fair: Fix calc_cfs_shares() fixed point arithmetics width confusion

2016-06-27 11:18:37 +02:00

features.h

…

idle_task.c

locking/lockdep, sched/core: Implement a better lock pinning scheme

2016-05-05 09:23:59 +02:00

idle.c

cpuidle: Do not access cpuidle_devices when !CONFIG_CPU_IDLE

2016-06-02 23:05:27 +02:00

loadavg.c

sched/core: Correct off by one bug in load migration calculation

2016-07-13 14:58:20 +02:00

Makefile

cpufreq: schedutil: New governor based on scheduler utilization data

2016-04-02 01:09:12 +02:00

rt.c

sched/core: Provide a tsk_nr_cpus_allowed() helper

2016-05-12 09:55:36 +02:00

sched.h

sched/core: Correct off by one bug in load migration calculation

2016-07-13 14:58:20 +02:00

stats.c

…

stats.h

sched/debug: Fix /proc/sched_debug regression

2016-06-08 14:31:58 +02:00

stop_task.c

locking/lockdep, sched/core: Implement a better lock pinning scheme

2016-05-05 09:23:59 +02:00

swait.c

…

wait.c

…