Juri Lelli d4742f6ed7 sched/deadline: Correctly account for allocated bandwidth during hotplug ...

For hotplug operations, DEADLINE needs to check that there is still enough
bandwidth left after removing the CPU that is going offline. We however
fail to do so currently.

Restore the correct behavior by restructuring dl_bw_manage() a bit, so
that overflow conditions (not enough bandwidth left) are properly
checked. Also account for dl_server bandwidth, i.e. discount such
bandwidth in the calculation since NORMAL tasks will be anyway moved
away from the CPU as a result of the hotplug operation.

Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Phil Auld <pauld@redhat.com>
Tested-by: Waiman Long <longman@redhat.com>
Link: https://lore.kernel.org/r/20241114142810.794657-3-juri.lelli@redhat.com

2024-12-02 12:01:31 +01:00

..

autogroup.c

scheduler: Remove the now superfluous sentinel elements from ctl_table array

2024-04-24 09:43:54 +02:00

autogroup.h

sched/headers: Add header guard to kernel/sched/stats.h and kernel/sched/autogroup.h

2022-02-23 08:22:00 +01:00

build_policy.c

sched_ext: Disallow loading BPF scheduler if isolcpus= domain isolation is in effect

2024-07-08 09:30:13 -10:00

build_utility.c

sched/headers: Remove duplicate header inclusions

2023-10-03 21:27:55 +02:00

clock.c

sched: Fix spelling in comments

2024-05-27 17:00:21 +02:00

completion.c

sched: add a few helpers to wake up tasks on the current cpu

2023-07-17 16:08:08 -07:00

core_sched.c

sched: Fix spelling in comments

2024-05-27 17:00:21 +02:00

core.c

sched/deadline: Correctly account for allocated bandwidth during hotplug

2024-12-02 12:01:31 +01:00

cpuacct.c

Merge branch 'sched/fast-headers' into sched/core

2022-03-15 09:05:05 +01:00

cpudeadline.c

sched/topology: Consolidate and clean up access to a CPU's max compute capacity

2023-10-09 12:59:48 +02:00

cpudeadline.h

sched/headers: Simplify and clean up header usage in the scheduler

2018-03-04 12:39:29 +01:00

cpufreq_schedutil.c

sched/cpufreq: Ensure sd is rebuilt for EAS check

2024-11-12 21:36:51 +01:00

cpufreq.c

sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there

2022-02-23 10:58:33 +01:00

cpupri.c

sched/rt: Fix live lock between select_fallback_rq() and RT push

2023-09-28 22:58:13 +02:00

cpupri.h

sched/cpupri: Add CPUPRI_HIGHER

2020-10-29 11:00:30 +01:00

cputime.c

sched/cputime: Fix mul_u64_u64_div_u64() precision for cputime

2024-07-29 12:22:32 +02:00

deadline.c

sched/deadline: Correctly account for allocated bandwidth during hotplug

2024-12-02 12:01:31 +01:00

debug.c

sched: Enable PREEMPT_DYNAMIC for PREEMPT_RT

2024-11-05 12:55:38 +01:00

ext.c

Merge tag 'sched_ext-for-6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext

2024-11-20 10:08:00 -08:00

ext.h

sched: Pass correct scheduling policy to __setscheduler_class

2024-10-29 13:57:51 +01:00

fair.c

sched/fair: Check idle_cpu() before need_resched() to detect ilb CPU turning busy

2024-12-02 12:01:28 +01:00

features.h

sched/fair: fix the comment for PREEMPT_SHORT

2024-10-07 09:28:41 +02:00

idle.c

Merge tag 'timers-core-2024-11-18' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2024-11-19 16:35:06 -08:00

isolation.c

sched/isolation: Fix boot crash when maxcpus < first housekeeping CPU

2024-04-28 10:08:21 +02:00

loadavg.c

sched: Fix spelling in comments

2024-05-27 17:00:21 +02:00

Makefile

sched/headers: Introduce kernel/sched/build_policy.c and build multiple .c files there

2022-02-23 10:58:33 +01:00

membarrier.c

Merge tag 'riscv-for-linus-6.9-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2024-03-22 10:41:13 -07:00

pelt.c

sched: Split scheduler and execution contexts

2024-10-14 12:52:42 +02:00

pelt.h

sched: Move update_other_load_avgs() to kernel/sched/pelt.c

2024-09-11 20:00:21 -10:00

psi.c

sched: psi: fix bogus pressure spikes from aggregation race

2024-10-03 16:03:16 -07:00

rt.c

sched: Split scheduler and execution contexts

2024-10-14 12:52:42 +02:00

sched-pelt.h

sched/fair: Fix "runnable_avg_yN_inv" not used warnings

2019-06-17 12:15:58 +02:00

sched.h

sched/deadline: Correctly account for allocated bandwidth during hotplug

2024-12-02 12:01:31 +01:00

smp.h

sched, smp: Trace smp callback causing an IPI

2023-03-24 11:01:29 +01:00

stats.c

profiling: remove profile=sleep support

2024-08-04 13:36:28 -07:00

stats.h

sched: psi: pass enqueue/dequeue flags to psi callbacks directly

2024-10-26 09:28:38 +02:00

stop_task.c

sched: Add put_prev_task(.next)

2024-09-03 15:26:32 +02:00

swait.c

sched: add a few helpers to wake up tasks on the current cpu

2023-07-17 16:08:08 -07:00

syscalls.c

sched: fix warning in sched_setaffinity

2024-12-02 12:01:27 +01:00

topology.c

sched/deadline: Restore dl_server bandwidth on non-destructive root domain changes

2024-12-02 12:01:30 +01:00

wait_bit.c

sched/wait: Remove unused bit_wait_io_timeout

2024-10-07 09:28:41 +02:00

wait.c

sched: remove wait bookmarks

2023-10-18 14:34:18 -07:00