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cgroup: remove obsoleted broken_hierarchy and warned_broken_hierarchy

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With the deprecation of the non-hierarchical mode of the memory controller
there are no more examples of broken hierarchies left.

Let's remove the cgroup core code which was supposed to print warnings
about creating of broken hierarchies.

Link: https://lkml.kernel.org/r/20201110220800.929549-4-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roman Gushchin 2020-12-14 19:06:55 -08:00 committed by Linus Torvalds
parent 184218639a
commit 9d9d341df4
2 changed files with 0 additions and 22 deletions
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15
include/linux/cgroup-defs.h
View File

@ -668,21 +668,6 @@ struct cgroup_subsys {
*/
bool threaded:1;
/*
* If %false, this subsystem is properly hierarchical -
* configuration, resource accounting and restriction on a parent
* cgroup cover those of its children. If %true, hierarchy support
* is broken in some ways - some subsystems ignore hierarchy
* completely while others are only implemented half-way.
*
* It's now disallowed to create nested cgroups if the subsystem is
* broken and cgroup core will emit a warning message on such
* cases. Eventually, all subsystems will be made properly
* hierarchical and this will go away.
*/
bool broken_hierarchy:1;
bool warned_broken_hierarchy:1;
/* the following two fields are initialized automtically during boot */
int id;
const char *name;

7
kernel/cgroup/cgroup.c
View File

@ -5149,13 +5149,6 @@ static struct cgroup_subsys_state *css_create(struct cgroup *cgrp,
if (err)
goto err_list_del;
if (ss->broken_hierarchy && !ss->warned_broken_hierarchy &&
cgroup_parent(parent)) {
pr_warn("%s (%d) created nested cgroup for controller \"%s\" which has incomplete hierarchy support. Nested cgroups may change behavior in the future.\n",
current->comm, current->pid, ss->name);
ss->warned_broken_hierarchy = true;
}
return css;
err_list_del: