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authorLinus Torvalds <torvalds@linux-foundation.org>2021-07-01 17:17:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-07-01 17:17:24 -0700
commite267992f9ef0bf717d70a9ee18049782f77e4b3a (patch)
tree6caf3664452672f41e8039f6af4279e2df709d66 /mm/memcontrol.c
parent19b438592238b3b40c3f945bb5f9c4ca971c0c45 (diff)
parente4d777003a43feab2e000749163e531f6c48c385 (diff)
downloadlinux-e267992f9ef0bf717d70a9ee18049782f77e4b3a.tar.bz2
Merge branch 'for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
Pull percpu updates from Dennis Zhou: - percpu chunk depopulation - depopulate backing pages for chunks with empty pages when we exceed a global threshold without those pages. This lets us reclaim a portion of memory that would previously be lost until the full chunk would be freed (possibly never). - memcg accounting cleanup - previously separate chunks were managed for normal allocations and __GFP_ACCOUNT allocations. These are now consolidated which cleans up the code quite a bit. - a few misc clean ups for clang warnings * 'for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu: percpu: optimize locking in pcpu_balance_workfn() percpu: initialize best_upa variable percpu: rework memcg accounting mm, memcg: introduce mem_cgroup_kmem_disabled() mm, memcg: mark cgroup_memory_nosocket, nokmem and noswap as __ro_after_init percpu: make symbol 'pcpu_free_slot' static percpu: implement partial chunk depopulation percpu: use pcpu_free_slot instead of pcpu_nr_slots - 1 percpu: factor out pcpu_check_block_hint() percpu: split __pcpu_balance_workfn() percpu: fix a comment about the chunks ordering
Diffstat (limited to 'mm/memcontrol.c')
-rw-r--r--mm/memcontrol.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 4ee243ce6135..b80aae448a49 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -81,14 +81,14 @@ DEFINE_PER_CPU(struct mem_cgroup *, int_active_memcg);
EXPORT_PER_CPU_SYMBOL_GPL(int_active_memcg);
/* Socket memory accounting disabled? */
-static bool cgroup_memory_nosocket;
+static bool cgroup_memory_nosocket __ro_after_init;
/* Kernel memory accounting disabled? */
-bool cgroup_memory_nokmem;
+bool cgroup_memory_nokmem __ro_after_init;
/* Whether the swap controller is active */
#ifdef CONFIG_MEMCG_SWAP
-bool cgroup_memory_noswap __read_mostly;
+bool cgroup_memory_noswap __ro_after_init;
#else
#define cgroup_memory_noswap 1
#endif
@@ -256,6 +256,11 @@ 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 void obj_cgroup_uncharge_pages(struct obj_cgroup *objcg,
unsigned int nr_pages);