This is a backport of the series that fixes the way deadline bandwidth restoration is done which is causing noticeable delay on resume path. It also converts the cpuset lock back into a mutex which some users on Android too. I lack the details but AFAIU the read/write semaphore was slower on high contention.
Compile tested against some randconfig for different archs. Only boot tested on x86 qemu.
Based on v6.4.11
Original series:
https://lore.kernel.org/lkml/20230508075854.17215-1-juri.lelli@redhat.com/
Thanks!
-- Qais Yousef
Dietmar Eggemann (2): sched/deadline: Create DL BW alloc, free & check overflow interface cgroup/cpuset: Free DL BW in case can_attach() fails
Juri Lelli (4): cgroup/cpuset: Rename functions dealing with DEADLINE accounting sched/cpuset: Bring back cpuset_mutex sched/cpuset: Keep track of SCHED_DEADLINE task in cpusets cgroup/cpuset: Iterate only if DEADLINE tasks are present
include/linux/cpuset.h | 12 +- include/linux/sched.h | 4 +- kernel/cgroup/cgroup.c | 4 + kernel/cgroup/cpuset.c | 244 ++++++++++++++++++++++++++-------------- kernel/sched/core.c | 41 +++---- kernel/sched/deadline.c | 67 ++++++++--- kernel/sched/sched.h | 2 +- 7 files changed, 246 insertions(+), 128 deletions(-)