The patch 1 have been reviewed by Michal Koutný. Add two patches as follow. v4: - add a patch to document that saturating the system_wq is not permitted. - add a patch to adjust WQ_MAX_ACTIVE from 512 to 2048. v3: - optimize commit msg. Link v1: https://lore.kernel.org/cgroups/20240607110313.2230669-1-chenridong@xxxxxxxxxx/ Link v2: https://lore.kernel.org/cgroups/20240719025232.2143638-1-chenridong@xxxxxxxxxx/ Link v3: https://lore.kernel.org/cgroups/20240817093334.6062-1-chenridong@xxxxxxxxxx/ Chen Ridong (3): cgroup: fix deadlock caused by cgroup_mutex and cpu_hotplug_lock workqueue: doc: Add a note saturating the system_wq is not permitted workqueue: Adjust WQ_MAX_ACTIVE from 512 to 2048 Documentation/core-api/workqueue.rst | 8 ++++++-- include/linux/workqueue.h | 2 +- kernel/bpf/cgroup.c | 2 +- kernel/cgroup/cgroup-internal.h | 1 + kernel/cgroup/cgroup.c | 2 +- 5 files changed, 10 insertions(+), 5 deletions(-) -- 2.34.1