Commit abe1a624 authored by Liu Shixin's avatar Liu Shixin
Browse files

mm/memcg: introduce mem_cgroup_scan_cgroups to scan all memcgs 

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8S9BY


CVE: NA

--------------------------------

Introduce mem_cgroup_scan_cgroups to iterate over memcgs of a memory
cgroup hierarchy.

Signed-off-by: default avatarLiu Shixin <liushixin2@huawei.com>
parent ea6de9f6

include/linux/memcontrol.h

+3 −0
Original line number Diff line number Diff line
@@ -883,6 +883,9 @@ struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, 
void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);

void mem_cgroup_scan_tasks(struct mem_cgroup *memcg,

			   int (*)(struct task_struct *, void *), void *arg);

void mem_cgroup_scan_cgroups(struct mem_cgroup *memcg,

			     void (*fn)(struct mem_cgroup *, void *),

			     void *arg);



static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)

{

mm/memcontrol.c

+18 −0
Original line number Diff line number Diff line
@@ -1310,6 +1310,24 @@ void mem_cgroup_scan_tasks(struct mem_cgroup *memcg, 
	}

}



/**

 * mem_cgroup_scan_cgroups - iterate over memcgs of a memory cgroup hierarchy

 * @memcg: hierarchy root

 * @fn: function to call for each memcg

 * @arg: argument passed to @fn

 *

 * This function iterates over memcg attached to @memcg or to any of its

 * descendants and calls @fn for each memcgs.

 */

void mem_cgroup_scan_cgroups(struct mem_cgroup *memcg,

			     void (*fn)(struct mem_cgroup *, void *), void *arg)

{

	struct mem_cgroup *iter;



	for_each_mem_cgroup_tree(iter, memcg)

		fn(iter, arg);

}



#ifdef CONFIG_DEBUG_VM

void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio)

{