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linux/kernel/sched
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Sebastian Andrzej Siewior ff65057665 sched: Teach the forced-newidle balancer about CPU affinity limitation. 
commit 386ef214c3c6ab111d05e1790e79475363abaa05 upstream.

try_steal_cookie() looks at task_struct::cpus_mask to decide if the
task could be moved to `this' CPU. It ignores that the task might be in
a migration disabled section while not on the CPU. In this case the task
must not be moved otherwise per-CPU assumption are broken.

Use is_cpu_allowed(), as suggested by Peter Zijlstra, to decide if the a
task can be moved.

Fixes: d2dfa17bc7de6 ("sched: Trivial forced-newidle balancer")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/YjNK9El+3fzGmswf@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-04-13 20:59:27 +02:00
..
autogroup.c
sched/fair: Prevent dead task groups from regaining cfs_rq's
2021-11-25 09:48:32 +01:00
autogroup.h
…
clock.c
sched: Fix various typos
2021-03-22 00:11:52 +01:00
completion.c
completion: Use lockdep_assert_RT_in_threaded_ctx() in complete_all()
2020-03-23 18:40:25 +01:00
core_sched.c
sched: prctl() core-scheduling interface
2021-05-12 11:43:31 +02:00
core.c
sched: Teach the forced-newidle balancer about CPU affinity limitation.
2022-04-13 20:59:27 +02:00
cpuacct.c
sched/cpuacct: Fix charge percpu cpuusage
2022-04-08 14:23:11 +02:00
cpudeadline.c
sched,rt: Use the full cpumask for balancing
2020-11-10 18:39:00 +01:00
cpudeadline.h
…
cpufreq_schedutil.c
sched/uclamp: Fix iowait boost escaping uclamp restriction
2022-04-08 14:23:10 +02:00
cpufreq.c
cpufreq: Avoid leaving stale IRQ work items during CPU offline
2019-12-12 17:59:43 +01:00
cpupri.c
sched: Fix various typos
2021-03-22 00:11:52 +01:00
cpupri.h
sched/cpupri: Add CPUPRI_HIGHER
2020-10-29 11:00:30 +01:00
cputime.c
cputime, cpuacct: Include guest time in user time in cpuacct.stat
2022-01-27 11:05:09 +01:00
deadline.c
sched/rt: Plug rt_mutex_setprio() vs push_rt_task() race
2022-04-08 14:23:11 +02:00
debug.c
sched/debug: Remove mpol_get/put and task_lock/unlock from sched_show_numa
2022-04-08 14:23:10 +02:00
fair.c
sched/fair: Improve consistency of allowed NUMA balance calculations
2022-04-08 14:23:11 +02:00
features.h
sched: Warn on long periods of pending need_resched
2021-04-21 13:55:41 +02:00
idle.c
sched/idle: Make the idle timer expire in hard interrupt context
2021-09-09 10:36:16 +02:00
isolation.c
sched/isolation: Reconcile rcu_nocbs= and nohz_full=
2021-05-13 14:12:47 +02:00
loadavg.c
sched: Make multiple runqueue task counters 32-bit
2021-05-12 21:34:17 +02:00
Makefile
sched: Trivial core scheduling cookie management
2021-05-12 11:43:31 +02:00
membarrier.c
sched/membarrier: Fix membarrier-rseq fence command missing from query bitmask
2022-02-01 17:27:05 +01:00
pelt.c
sched: Fix various typos
2021-03-22 00:11:52 +01:00
pelt.h
sched/pelt: Relax the sync of util_sum with util_avg
2022-02-01 17:27:10 +01:00
psi.c
psi: fix "defined but not used" warnings when CONFIG_PROC_FS=n
2022-02-01 17:27:15 +01:00
rt.c
sched/rt: Plug rt_mutex_setprio() vs push_rt_task() race
2022-04-08 14:23:11 +02:00
sched-pelt.h
…
sched.h
sched/fair: Prevent dead task groups from regaining cfs_rq's
2021-11-25 09:48:32 +01:00
smp.h
sched/headers: Split out open-coded prototypes into kernel/sched/smp.h
2020-05-28 11:03:20 +02:00
stats.c
sched: Fix various typos
2021-03-22 00:11:52 +01:00
stats.h
psi: Fix PSI_MEM_FULL state when tasks are in memstall and doing reclaim
2022-01-27 11:04:27 +01:00
stop_task.c
sched: Introduce sched_class::pick_task()
2021-05-12 11:43:28 +02:00
swait.c
sched/swait: Prepare usage in completions
2020-03-21 16:00:23 +01:00
topology.c
sched/topology: Skip updating masks for non-online nodes
2021-08-20 12:32:57 +02:00
wait_bit.c
sched/wait: fix ___wait_var_event(exclusive)
2019-12-17 13:32:50 +01:00
wait.c
wait: add wake_up_pollfree()
2021-12-14 10:57:15 +01:00