Cheng Yu 941e1c6d86 sched/core: Fix incorrect initialization of the 'burst' parameter in cpu_max_write() ... [ Upstream commit 49217ea147 ] In the cgroup v2 CPU subsystem, assuming we have a cgroup named 'test', and we set cpu.max and cpu.max.burst: # echo 1000000 > /sys/fs/cgroup/test/cpu.max # echo 1000000 > /sys/fs/cgroup/test/cpu.max.burst then we check cpu.max and cpu.max.burst: # cat /sys/fs/cgroup/test/cpu.max 1000000 100000 # cat /sys/fs/cgroup/test/cpu.max.burst 1000000 Next we set cpu.max again and check cpu.max and cpu.max.burst: # echo 2000000 > /sys/fs/cgroup/test/cpu.max # cat /sys/fs/cgroup/test/cpu.max 2000000 100000 # cat /sys/fs/cgroup/test/cpu.max.burst 1000 ... we find that the cpu.max.burst value changed unexpectedly. In cpu_max_write(), the unit of the burst value returned by tg_get_cfs_burst() is microseconds, while in cpu_max_write(), the burst unit used for calculation should be nanoseconds, which leads to the bug. To fix it, get the burst value directly from tg->cfs_bandwidth.burst. Fixes: f4183717b3 ("sched/fair: Introduce the burstable CFS controller") Reported-by: Qixin Liao <liaoqixin@huawei.com> Signed-off-by: Cheng Yu <serein.chengyu@huawei.com> Signed-off-by: Zhang Qiao <zhangqiao22@huawei.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org> Tested-by: Vincent Guittot <vincent.guittot@linaro.org> Link: https://lore.kernel.org/r/20240424132438.514720-1-serein.chengyu@huawei.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-06-12 11:12:13 +02:00
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autogroup.c
autogroup.h
build_policy.c
build_utility.c
clock.c	Locking changes for v6.5:	2023-06-27 14:14:30 -07:00
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
core.c	sched/core: Fix incorrect initialization of the 'burst' parameter in cpu_max_write()	2024-06-12 11:12:13 +02:00
cpuacct.c
cpudeadline.c
cpudeadline.h
cpufreq_schedutil.c	cpufreq: schedutil: Update next_freq when cpufreq_limits change	2023-10-05 22:09:50 +02:00
cpufreq.c
cpupri.c	sched/rt: Fix live lock between select_fallback_rq() and RT push	2023-09-28 22:58:13 +02:00
cpupri.h
cputime.c
deadline.c	sched: Fix stop_one_cpu_nowait() vs hotplug	2023-11-20 11:58:52 +01:00
debug.c	sched/debug: Rename sysctl_sched_min_granularity to sysctl_sched_base_slice	2023-07-19 09:43:59 +02:00
fair.c	sched/fair: Add EAS checks before updating root_domain::overutilized	2024-06-12 11:11:37 +02:00
features.h	sched/eevdf: Curb wakeup-preemption	2023-08-17 17:07:07 +02:00
idle.c	kernel/sched: Modify initial boot task idle setup	2023-09-19 10:48:04 +02:00
isolation.c	sched/isolation: Fix boot crash when maxcpus < first housekeeping CPU	2024-06-12 11:11:24 +02:00
loadavg.c
Makefile
membarrier.c	sched/membarrier: reduce the ability to hammer on sys_membarrier	2024-02-23 09:25:27 +01:00
pelt.c
pelt.h
psi.c	Linux 6.5-rc2	2023-07-19 09:43:25 +02:00
rt.c	sched/rt: Disallow writing invalid values to sched_rt_period_us	2024-03-01 13:34:47 +01:00
sched-pelt.h
sched.h	sched: Add missing memory barrier in switch_mm_cid	2024-04-27 17:11:41 +02:00
smp.h
stats.c
stats.h
stop_task.c
swait.c	sched: add a few helpers to wake up tasks on the current cpu	2023-07-17 16:08:08 -07:00
topology.c	sched/fair: Allow disabling sched_balance_newidle with sched_relax_domain_level	2024-06-12 11:12:13 +02:00
wait_bit.c
wait.c	sched: add a few helpers to wake up tasks on the current cpu	2023-07-17 16:08:08 -07:00