diff options
author | Tejun Heo <tj@kernel.org> | 2017-06-14 23:01:32 +0300 |
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committer | Tejun Heo <tj@kernel.org> | 2017-06-14 23:01:32 +0300 |
commit | 8cc38fa7fa317d44710f24475576b1f9ee205da9 (patch) | |
tree | d5390c1d904a901a94992e7c0075971bf399baf5 /kernel/cgroup/debug.c | |
parent | 575313f40ff33d0c2aff2701dfb2ccfcd6211d55 (diff) | |
download | linux-8cc38fa7fa317d44710f24475576b1f9ee205da9.tar.xz |
cgroup: make debug an implicit controller on cgroup2
Make debug an implicit controller on cgroup2 which is enabled by
"cgroup_debug" boot param.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Diffstat (limited to 'kernel/cgroup/debug.c')
-rw-r--r-- | kernel/cgroup/debug.c | 59 |
1 files changed, 56 insertions, 3 deletions
diff --git a/kernel/cgroup/debug.c b/kernel/cgroup/debug.c index 057d9b07f461..d61e692a5338 100644 --- a/kernel/cgroup/debug.c +++ b/kernel/cgroup/debug.c @@ -240,7 +240,7 @@ static u64 releasable_read(struct cgroup_subsys_state *css, struct cftype *cft) !css_has_online_children(&css->cgroup->self)); } -static struct cftype debug_files[] = { +static struct cftype debug_legacy_files[] = { { .name = "taskcount", .read_u64 = debug_taskcount_read, @@ -287,9 +287,62 @@ static struct cftype debug_files[] = { { } /* terminate */ }; +static struct cftype debug_files[] = { + { + .name = "taskcount", + .read_u64 = debug_taskcount_read, + }, + + { + .name = "current_css_set", + .seq_show = current_css_set_read, + .flags = CFTYPE_ONLY_ON_ROOT, + }, + + { + .name = "current_css_set_refcount", + .read_u64 = current_css_set_refcount_read, + .flags = CFTYPE_ONLY_ON_ROOT, + }, + + { + .name = "current_css_set_cg_links", + .seq_show = current_css_set_cg_links_read, + .flags = CFTYPE_ONLY_ON_ROOT, + }, + + { + .name = "css_links", + .seq_show = cgroup_css_links_read, + }, + + { + .name = "csses", + .seq_show = cgroup_subsys_states_read, + }, + + { + .name = "masks", + .seq_show = cgroup_masks_read, + }, + + { } /* terminate */ +}; + struct cgroup_subsys debug_cgrp_subsys = { .css_alloc = debug_css_alloc, .css_free = debug_css_free, - .legacy_cftypes = debug_files, - .dfl_cftypes = debug_files, + .legacy_cftypes = debug_legacy_files, }; + +/* + * On v2, debug is an implicit controller enabled by "cgroup_debug" boot + * parameter. + */ +static int __init enable_cgroup_debug(char *str) +{ + debug_cgrp_subsys.dfl_cftypes = debug_files; + debug_cgrp_subsys.implicit_on_dfl = true; + return 1; +} +__setup("cgroup_debug", enable_cgroup_debug); |