mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-16 02:01:18 -04:00
Code Issues Packages Projects Releases Wiki Activity

mm: memcontrol: refactor memcg_reparent_objcgs()

Browse Source 
Refactor the memcg_reparent_objcgs() to facilitate subsequent reparenting
LRU folios here.

Link: https://lore.kernel.org/2e5696db1993e593a51004c1dacedbc261689629.1772711148.git.zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Cc: Allen Pais <apais@linux.microsoft.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Chen Ridong <chenridong@huawei.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Hamza Mahfooz <hamzamahfooz@linux.microsoft.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Imran Khan <imran.f.khan@oracle.com>
Cc: Kamalesh Babulal <kamalesh.babulal@oracle.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam Howlett <Liam.Howlett@oracle.com>
Cc: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Usama Arif <usamaarif642@gmail.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yosry Ahmed <yosry@kernel.org>
Cc: Yuanchu Xie <yuanchu@google.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Qi Zheng
2026-03-05 19:52:45 +08:00
committed by Andrew Morton
parent f304652609
commit 131adcc774
1 changed files with 24 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
mm/memcontrol.c
View File

@@ -208,15 +208,12 @@ static struct obj_cgroup *obj_cgroup_alloc(void)
return objcg;
}
static void memcg_reparent_objcgs(struct mem_cgroup *memcg)
static inline struct obj_cgroup *__memcg_reparent_objcgs(struct mem_cgroup *memcg,
struct mem_cgroup *parent)
{
struct obj_cgroup *objcg, *iter;
struct mem_cgroup *parent = parent_mem_cgroup(memcg);
objcg = rcu_replace_pointer(memcg->objcg, NULL, true);
spin_lock_irq(&objcg_lock);
/* 1) Ready to reparent active objcg. */
list_add(&objcg->list, &memcg->objcg_list);
/* 2) Reparent active objcg and already reparented objcgs to parent. */
@@ -225,7 +222,29 @@ static void memcg_reparent_objcgs(struct mem_cgroup *memcg)
/* 3) Move already reparented objcgs to the parent's list */
list_splice(&memcg->objcg_list, &parent->objcg_list);
return objcg;
}
static inline void reparent_locks(struct mem_cgroup *memcg, struct mem_cgroup *parent)
{
spin_lock_irq(&objcg_lock);
}
static inline void reparent_unlocks(struct mem_cgroup *memcg, struct mem_cgroup *parent)
{
spin_unlock_irq(&objcg_lock);
}
static void memcg_reparent_objcgs(struct mem_cgroup *memcg)
{
struct obj_cgroup *objcg;
struct mem_cgroup *parent = parent_mem_cgroup(memcg);
reparent_locks(memcg, parent);
objcg = __memcg_reparent_objcgs(memcg, parent);
reparent_unlocks(memcg, parent);
percpu_ref_kill(&objcg->refcnt);
}