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ANDROID: mm: export mem_cgroup_move_account

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Export mem_cgroup_move_account to migrate folios between different
memcgs. This is to achieve more accurate memory reclamation.

Bug: 373540729
Change-Id: I77ac12fdc25bae90f37f725be1a168da52f02abd
Signed-off-by: Jianan Huang <huangjianan@xiaomi.com>
(cherry picked from commit c031476ae982c66d0f0674eb0a5c1ee03e825fd7)
This commit is contained in:
Jianan Huang
2024-10-15 15:13:31 +08:00
committed by Todd Kjos
parent ff55f3e7ea
commit c0b27cdcc7
2 changed files with 15 additions and 1 deletions
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13
include/linux/memcontrol.h
View File

@@ -357,6 +357,11 @@ enum page_memcg_data_flags {
static inline bool folio_memcg_kmem(struct folio *folio); static inline bool folio_memcg_kmem(struct folio *folio);
int mem_cgroup_move_account(struct page *page,
bool compound,
struct mem_cgroup *from,
struct mem_cgroup *to);
/* /*
* After the initialization objcg->memcg is always pointing at * After the initialization objcg->memcg is always pointing at
* a valid memcg, but can be atomically swapped to the parent memcg. * a valid memcg, but can be atomically swapped to the parent memcg.
@@ -1188,6 +1193,14 @@ static inline bool PageMemcgKmem(struct page *page)
return false; return false;
} }
static inline int mem_cgroup_move_account(struct page *page,
bool compound,
struct mem_cgroup *from,
struct mem_cgroup *to)
{
return 0;
}
static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg) static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
{ {
return true; return true;

3
mm/memcontrol.c
View File

@@ -5750,7 +5750,7 @@ static struct page *mc_handle_file_pte(struct vm_area_struct *vma,
* This function doesn't do "charge" to new cgroup and doesn't do "uncharge" * This function doesn't do "charge" to new cgroup and doesn't do "uncharge"
* from old cgroup. * from old cgroup.
*/ */
static int mem_cgroup_move_account(struct page *page, int mem_cgroup_move_account(struct page *page,
bool compound, bool compound,
struct mem_cgroup *from, struct mem_cgroup *from,
struct mem_cgroup *to) struct mem_cgroup *to)
@@ -5861,6 +5861,7 @@ out_unlock:
out: out:
return ret; return ret;
} }
EXPORT_SYMBOL_GPL(mem_cgroup_move_account);
/** /**
* get_mctgt_type - get target type of moving charge * get_mctgt_type - get target type of moving charge