Michal Koutný 1e53f83deb cgroup: Add compatibility option for content of /proc/cgroups ... [ Upstream commit 646faf36d7 ] /proc/cgroups lists only v1 controllers by default, however, this is only enforced since the commit af000ce852 ("cgroup: Do not report unavailable v1 controllers in /proc/cgroups") and there is software in the wild that uses content of /proc/cgroups to decide on availability of v2 (sic) controllers. Add a boottime param that can bring back the previous behavior for setups where the check in the software cannot be changed and it causes e.g. unintended OOMs. Also, this patch takes out cgrp_v1_visible from cgroup1_subsys_absent() guard since it's only important to check which hierarchy (v1 vs v2) the subsys is attached to. This has no effect on the printed message but the code is cleaner since cgrp_v1_visible is really about mounted hierarchies, not the content of /proc/cgroups. Link: https://lore.kernel.org/r/b26b60b7d0d2a5ecfd2f3c45f95f32922ed24686.camel@decadent.org.uk Fixes: af000ce852 ("cgroup: Do not report unavailable v1 controllers in /proc/cgroups") Fixes: a0ab145322 ("cgroup: Print message when /proc/cgroups is read on v2-only system") Signed-off-by: Michal Koutný <mkoutny@suse.com> Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-08-15 16:39:10 +02:00
..
cgroup-internal.h	cgroup: use subsystem-specific rstat locks to avoid contention	2025-05-19 10:29:42 -10:00
cgroup-v1.c	cgroup: Add compatibility option for content of /proc/cgroups	2025-08-15 16:39:10 +02:00
cgroup.c	cgroup: Changes for v6.16	2025-05-27 20:59:53 -07:00
cpuset-internal.h	cgroup/cpuset: Don't allow creation of local partition over a remote one	2025-03-31 13:26:53 -10:00
cpuset-v1.c	RFC cgroup/cpuset-v1: Add deprecation messages to sched_relax_domain_level	2025-03-11 09:22:54 -10:00
cpuset.c	- The 11 patch series "Add folio_mk_pte()" from Matthew Wilcox	2025-05-31 15:44:16 -07:00
debug.c
dmem.c	cgroup/dmem: Don't open-code css_for_each_descendant_pre	2025-02-19 09:50:37 +01:00
freezer.c	cgroup/freezer: Add cgroup CGRP_FROZEN flag update helper	2024-10-23 09:45:09 -10:00
legacy_freezer.c	Revert "cgroup_freezer: cgroup_freezing: Check if not frozen"	2025-07-17 07:57:02 -10:00
Makefile	kernel/cgroup: Add "dmem" memory accounting cgroup	2025-01-06 17:24:38 +01:00
misc.c	Merge branch 'kvm-tdx-initial' into HEAD	2025-04-07 07:36:33 -04:00
namespace.c	cgroup:namespace: Remove unused cgroup_namespaces_init()	2023-08-14 14:29:47 -10:00
pids.c	cgroup/pids: Remove unreachable paths of pids_{can,cancel}_fork	2024-08-05 10:32:16 -10:00
rdma.c	rdmacg: fix kernel-doc warnings in rdmacg	2023-06-05 09:45:14 -10:00
rstat.c	cgroup: adjust criteria for rstat subsystem cpu lock access	2025-05-30 14:36:13 -10:00