diff options
| author |   Roman Gushchin <guro@fb.com> | 2021-06-02 18:09:30 -0700 |
|---|---|---|
| committer |   Dennis Zhou <dennis@kernel.org> | 2021-06-05 20:41:14 +0000 |
| commit | 4d5c8aedc8aa6a1f5d1b06eb4f5517dc60dd9440 (patch) | |
| tree | 73d4b3c792664e007496ef6a5463b2aec1af6fe3 /mm/memcontrol.c | |
| parent | mm, memcg: mark cgroup_memory_nosocket, nokmem and noswap as __ro_after_init (diff) | |
| download | linux-dev-4d5c8aedc8aa6a1f5d1b06eb4f5517dc60dd9440.tar.xz linux-dev-4d5c8aedc8aa6a1f5d1b06eb4f5517dc60dd9440.zip | |
mm, memcg: introduce mem_cgroup_kmem_disabled()
Introduce a new mem_cgroup_kmem_disabled() helper, similar to
mem_cgroup_disabled(), to check whether the kernel memory accounting
is off. A user could disable it using a boot option to eliminate
some associated costs.
The helper can be used outside of memcontrol.c to dynamically disable
the kmem-related code. The returned value is stable after the kernel
initialization is finished.
Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index e6203ee24a11..1fa9b00ec71d 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -255,6 +255,11 @@ struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr) #ifdef CONFIG_MEMCG_KMEM extern spinlock_t css_set_lock; +bool mem_cgroup_kmem_disabled(void) +{ + return cgroup_memory_nokmem; +} + static int __memcg_kmem_charge(struct mem_cgroup *memcg, gfp_t gfp, unsigned int nr_pages); static void __memcg_kmem_uncharge(struct mem_cgroup *memcg, |