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mm: kmem: switch to nr_pages in (__)memcg_kmem_charge_memcg()

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These functions are charging the given number of kernel pages to the given
memory cgroup.  The number doesn't have to be a power of two.  Let's make
them to take the unsigned int nr_pages as an argument instead of the page
order.

It makes them look consistent with the corresponding uncharge functions
and functions like: mem_cgroup_charge_skmem(memcg, nr_pages).

Signed-off-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Link: http://lkml.kernel.org/r/20200109202659.752357-5-guro@fb.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Roman Gushchin 2020-04-01 21:06:49 -07:00 committed by Linus Torvalds
parent f4b00eab50
commit 92d0510c35
3 changed files with 11 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
include/linux/memcontrol.h
View File

@ -1369,7 +1369,8 @@ void memcg_kmem_put_cache(struct kmem_cache *cachep);
#ifdef CONFIG_MEMCG_KMEM
int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order);
void __memcg_kmem_uncharge_page(struct page *page, int order);
int __memcg_kmem_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp, int order);
int __memcg_kmem_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp,
unsigned int nr_pages);
void __memcg_kmem_uncharge_memcg(struct mem_cgroup *memcg,
unsigned int nr_pages);
@ -1408,18 +1409,18 @@ static inline void memcg_kmem_uncharge_page(struct page *page, int order)
}
static inline int memcg_kmem_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp,
int order)
unsigned int nr_pages)
{
if (memcg_kmem_enabled())
return __memcg_kmem_charge_memcg(memcg, gfp, order);
return __memcg_kmem_charge_memcg(memcg, gfp, nr_pages);
return 0;
}
static inline void memcg_kmem_uncharge_memcg(struct mem_cgroup *memcg,
int order)
unsigned int nr_pages)
{
if (memcg_kmem_enabled())
__memcg_kmem_uncharge_memcg(memcg, 1 << order);
__memcg_kmem_uncharge_memcg(memcg, nr_pages);
}
/*

8
mm/memcontrol.c
View File

@ -2884,13 +2884,13 @@ void memcg_kmem_put_cache(struct kmem_cache *cachep)
* __memcg_kmem_charge_memcg: charge a kmem page
* @memcg: memory cgroup to charge
* @gfp: reclaim mode
* @order: allocation order
* @nr_pages: number of pages to charge
*
* Returns 0 on success, an error code on failure.
*/
int __memcg_kmem_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp, int order)
int __memcg_kmem_charge_memcg(struct mem_cgroup *memcg, gfp_t gfp,
unsigned int nr_pages)
{
unsigned int nr_pages = 1 << order;
struct page_counter *counter;
int ret;
@ -2934,7 +2934,7 @@ int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order)
memcg = get_mem_cgroup_from_current();
if (!mem_cgroup_is_root(memcg)) {
ret = __memcg_kmem_charge_memcg(memcg, gfp, order);
ret = __memcg_kmem_charge_memcg(memcg, gfp, 1 << order);
if (!ret) {
page->mem_cgroup = memcg;
__SetPageKmemcg(page);

2
mm/slab.h
View File

@ -365,7 +365,7 @@ static __always_inline int memcg_charge_slab(struct page *page,
return 0;
}
ret = memcg_kmem_charge_memcg(memcg, gfp, order);
ret = memcg_kmem_charge_memcg(memcg, gfp, 1 << order);
if (ret)
goto out;