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mm/memcg: rename mem_cgroup_split_huge_fixup to split_page_memcg and add nr_pages argument

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Rename mem_cgroup_split_huge_fixup to split_page_memcg and explicitly pass
in page number argument.

In this way, the interface name is more common and can be used by
potential users.  In addition, the complete info(memcg and flag) of the
memcg needs to be set to the tail pages.

Link: https://lkml.kernel.org/r/20210304074053.65527-2-zhouguanghui1@huawei.com
Signed-off-by: Zhou Guanghui <zhouguanghui1@huawei.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Tianhong Ding <dingtianhong@huawei.com>
Cc: Weilong Chen <chenweilong@huawei.com>
Cc: Rui Xiang <rui.xiang@huawei.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Zhou Guanghui
2021-03-12 21:08:30 -08:00
committed by Linus Torvalds
parent 61bf318eac
commit be6c8982e4
3 changed files with 9 additions and 14 deletions
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15
mm/memcontrol.c
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@@ -3287,24 +3287,21 @@ void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size)
#endif /* CONFIG_MEMCG_KMEM */
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
/*
* Because page_memcg(head) is not set on compound tails, set it now.
* Because page_memcg(head) is not set on tails, set it now.
*/
void mem_cgroup_split_huge_fixup(struct page *head)
void split_page_memcg(struct page *head, unsigned int nr)
{
struct mem_cgroup *memcg = page_memcg(head);
int i;
if (mem_cgroup_disabled())
if (mem_cgroup_disabled() || !memcg)
return;
for (i = 1; i < HPAGE_PMD_NR; i++) {
css_get(&memcg->css);
head[i].memcg_data = (unsigned long)memcg;
}
for (i = 1; i < nr; i++)
head[i].memcg_data = head->memcg_data;
css_get_many(&memcg->css, nr - 1);
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#ifdef CONFIG_MEMCG_SWAP
/**