Juri Lelli 9bcfe15278 sched/cpuset: Bring back cpuset_mutex ... commit 111cd11bbc54850f24191c52ff217da88a5e639b upstream. Turns out percpu_cpuset_rwsem - commit 1243dc518c ("cgroup/cpuset: Convert cpuset_mutex to percpu_rwsem") - wasn't such a brilliant idea, as it has been reported to cause slowdowns in workloads that need to change cpuset configuration frequently and it is also not implementing priority inheritance (which causes troubles with realtime workloads). Convert percpu_cpuset_rwsem back to regular cpuset_mutex. Also grab it only for SCHED_DEADLINE tasks (other policies don't care about stable cpusets anyway). Signed-off-by: Juri Lelli <juri.lelli@redhat.com> Reviewed-by: Waiman Long <longman@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> [ Conflict in kernel/cgroup/cpuset.c due to pulling new code/comments. Reject all new code. Remove BUG_ON() about rwsem that doesn't exist on mainline. ] Signed-off-by: Qais Yousef (Google) <qyousef@layalina.io> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-08-30 16:11:10 +02:00
..
cgroup-internal.h	memcg: Fix possible use-after-free in memcg_write_event_control()	2022-12-08 10:40:58 -08:00
cgroup-v1.c	cgroup: fix missing cpus_read_{lock,unlock}() in cgroup_transfer_tasks()	2023-06-21 16:00:51 +02:00
cgroup.c	sched/psi: use kernfs polling functions for PSI trigger polling	2023-07-27 08:50:38 +02:00
cpuset.c	sched/cpuset: Bring back cpuset_mutex	2023-08-30 16:11:10 +02:00
debug.c
freezer.c	cgroup: cleanup comments	2022-03-13 19:19:27 -10:00
legacy_freezer.c	cgroup,freezer: hold cpu_hotplug_lock before freezer_mutex in freezer_css_{online,offline}()	2023-06-28 11:12:25 +02:00
Makefile	cgroup: Add misc cgroup controller	2021-04-04 13:34:46 -04:00
misc.c	misc_cgroup: remove error log to avoid log flood	2021-09-20 07:35:38 -10:00
namespace.c	memcg: enable accounting for new namesapces and struct nsproxy	2021-09-03 09:58:12 -07:00
pids.c	cgroup: add pids.peak interface for pids controller	2022-09-04 09:26:51 -10:00
rdma.c	cgroup: fix spelling mistakes	2021-05-24 12:45:26 -04:00
rstat.c	cgroup: fix display of forceidle time at root	2023-04-20 12:35:13 +02:00