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72d0ad7cb5
linux/kernel/sched
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Odin Ugedal 72d0ad7cb5 sched/fair: Fix CFS bandwidth hrtimer expiry type 
The time remaining until expiry of the refresh_timer can be negative.
Casting the type to an unsigned 64-bit value will cause integer
underflow, making the runtime_refresh_within return false instead of
true. These situations are rare, but they do happen.

This does not cause user-facing issues or errors; other than
possibly unthrottling cfs_rq's using runtime from the previous period(s),
making the CFS bandwidth enforcement less strict in those (special)
situations.

Signed-off-by: Odin Ugedal <odin@uged.al>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ben Segall <bsegall@google.com>
Link: https://lore.kernel.org/r/20210629121452.18429-1-odin@uged.al
2021-07-02 15:58:24 +02:00
..
autogroup.c
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/fair: Introduce the burstable CFS controller 2021-06-24 09:07:50 +02:00
cpuacct.c sched: Wrap rq::lock access 2021-05-12 11:43:26 +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/cpufreq: Consider reduced CPU capacity in energy calculation 2021-06-17 14:11:43 +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 Scheduler updates for this cycle are: 2021-04-28 13:33:57 -07:00
deadline.c sched/rt: Fix Deadline utilization tracking during policy change 2021-06-22 16:41:59 +02:00
debug.c Merge branch 'sched/urgent' into sched/core, to resolve conflicts 2021-06-18 11:31:25 +02:00
fair.c sched/fair: Fix CFS bandwidth hrtimer expiry type 2021-07-02 15:58:24 +02:00
features.h sched: Warn on long periods of pending need_resched 2021-04-21 13:55:41 +02:00
idle.c sched: Trivial forced-newidle balancer 2021-05-12 11:43:30 +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 missing local execution of ipi_sync_rq_state() 2021-03-06 12:40:21 +01:00
pelt.c sched: Fix various typos 2021-03-22 00:11:52 +01:00
pelt.h Merge branch 'sched/urgent' into sched/core, to resolve conflicts 2021-06-18 11:31:25 +02:00
psi.c psi: Fix race between psi_trigger_create/destroy 2021-06-24 09:07:50 +02:00
rt.c sched/rt: Fix RT utilization tracking during policy change 2021-06-22 16:41:59 +02:00
sched-pelt.h
sched.h sched/fair: Introduce the burstable CFS controller 2021-06-24 09:07:50 +02:00
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 sched: Introduce task_is_running() 2021-06-18 11:43:07 +02:00
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: Rework CPU capacity asymmetry detection 2021-06-24 09:07:51 +02:00
wait_bit.c sched/wait: fix ___wait_var_event(exclusive) 2019-12-17 13:32:50 +01:00
wait.c sched/wait: Add add_wait_queue_priority() 2020-11-15 09:49:09 -05:00