[GIT PULL] cgroup changes for v6.1-rc1

From: Tejun Heo
Date: Mon Oct 03 2022 - 14:13:12 EST

The following changes since commit df02452f3df069a59bc9e69c84435bf115cb6e37:

cgroup: cgroup_get_from_id() must check the looked-up kn is a directory (2022-09-23 07:18:45 -1000)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git/ tags/cgroup-for-6.1

for you to fetch changes up to 8619e94d3be376bb5e8f20988c0e6e3309d2b09a:

cgroup: use strscpy() is more robust and safer (2022-09-23 17:27:02 -1000)

cgroup changes for v6.1-rc1.

* cpuset now support isolated cpus.partition type, which will enable dynamic
CPU isolation.
* pids.peak added to remember the max number of pids used.
* Holes in cgroup namespace plugged.
* Internal cleanups.

Note that for-6.1-fixes was pulled into for-6.1 twice. Both were for
follow-up cleanups and each merge commit has details.

Also, 8a693f7766f9 ("cgroup: Remove CFTYPE_PRESSURE") removes the flag used
by PSI changes in the tip tree and the merged result won't compile due to
the missing flag. Simply removing the struct init lines specifying the flag
is the correct resolution. linux-next already contains the correct fix:


Elijah Conners (1):
iocost_monitor: reorder BlkgIterator

Jiapeng Chong (1):
cgroup/cpuset: remove unreachable code

Josh Don (1):
cgroup: add pids.peak interface for pids controller

Michal Koutný (3):
cgroup: Honor caller's cgroup NS when resolving path
cgroup: cgroup: Honor caller's cgroup NS when resolving cgroup id
cgroup: Homogenize cgroup_get_from_id() return value

Tejun Heo (8):
cgroup: Replace cgroup->ancestor_ids[] with ->ancestors[]
Merge branch 'for-6.0-fixes' into for-6.1
cgroup: Fix build failure when CONFIG_SHRINKER_DEBUG
cgroup: Remove data-race around cgrp_dfl_visible
cgroup: Improve cftype add/rm error handling
cgroup: Remove CFTYPE_PRESSURE
Merge branch 'for-6.0-fixes' into for-6.1
cgroup: Make cgroup_get_from_id() prettier

Tetsuo Handa (1):
cgroup: Use cgroup_attach_{lock,unlock}() from cgroup_attach_task_all()

Waiman Long (10):
cgroup/cpuset: Enable update_tasks_cpumask() on top_cpuset
cgroup/cpuset: Miscellaneous cleanups & add helper functions
cgroup/cpuset: Allow no-task partition to have empty cpuset.cpus.effective
cgroup/cpuset: Relax constraints to partition & cpus changes
cgroup/cpuset: Add a new isolated cpus.partition type
cgroup/cpuset: Show invalid partition reason string
cgroup/cpuset: Relocate a code block in validate_change()
cgroup/cpuset: Make partition invalid if cpumask change violates exclusivity rule
cgroup/cpuset: Update description of cpuset.cpus.partition in cgroup-v2.rst
kselftest/cgroup: Add cpuset v2 partition root state test

William Dean (1):
cgroup: simplify code in cgroup_apply_control

ye xingchen (1):
cgroup: use strscpy() is more robust and safer

Documentation/admin-guide/cgroup-v2.rst | 156 +++--
block/blk-cgroup-fc-appid.c | 4 +-
include/linux/cgroup-defs.h | 18 +-
include/linux/cgroup.h | 13 +-
kernel/cgroup/cgroup-internal.h | 2 +
kernel/cgroup/cgroup-v1.c | 6 +-
kernel/cgroup/cgroup.c | 145 ++--
kernel/cgroup/cpuset.c | 815 ++++++++++++++--------
kernel/cgroup/pids.c | 37 +-
mm/memcontrol.c | 4 +-
net/netfilter/nft_socket.c | 9 +-
tools/cgroup/iocost_monitor.py | 10 +-
tools/perf/util/bpf_skel/bperf_cgroup.bpf.c | 2 +-
tools/testing/selftests/cgroup/.gitignore | 1 +
tools/testing/selftests/cgroup/Makefile | 5 +-
tools/testing/selftests/cgroup/test_cpuset_prs.sh | 674 ++++++++++++++++++
tools/testing/selftests/cgroup/wait_inotify.c | 87 +++
17 files changed, 1544 insertions(+), 444 deletions(-)
create mode 100755 tools/testing/selftests/cgroup/test_cpuset_prs.sh
create mode 100644 tools/testing/selftests/cgroup/wait_inotify.c