The patch titled
Subject: mm: memcontrol: move PageMemcgKmem to the scope of CONFIG_MEMCG_KMEM
has been added to the -mm tree. Its filename is
mm-memcontrol-move-pagememcgkmem-to-the-scope-of-config_memcg_kmem.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-move-pagememcgkmem-to-the-scope-of-config_memcg_kmem.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-move-pagememcgkmem-to-the-scope-of-config_memcg_kmem.patch
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------------------------------------------------------
From: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Subject: mm: memcontrol: move PageMemcgKmem to the scope of CONFIG_MEMCG_KMEM
The page only can be marked as kmem when CONFIG_MEMCG_KMEM is enabled. So
move PageMemcgKmem() to the scope of the CONFIG_MEMCG_KMEM.
As a bonus, on !CONFIG_MEMCG_KMEM build some code can be compiled out.
Link: https://lkml.kernel.org/r/20210319163821.20704-8-songmuchun@xxxxxxxxxxxxx
Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Acked-by: Roman Gushchin <guro@xxxxxx>
Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: Xiongchun Duan <duanxiongchun@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/include/linux/memcontrol.h~mm-memcontrol-move-pagememcgkmem-to-the-scope-of-config_memcg_kmem
+++ a/include/linux/memcontrol.h
@@ -523,6 +523,7 @@ static inline struct mem_cgroup *page_me
return (struct mem_cgroup *)(memcg_data & ~MEMCG_DATA_FLAGS_MASK);
}
+#ifdef CONFIG_MEMCG_KMEM
/*
* PageMemcgKmem - check if the page has MemcgKmem flag set
* @page: a pointer to the page struct
@@ -537,7 +538,6 @@ static inline bool PageMemcgKmem(struct
return page->memcg_data & MEMCG_DATA_KMEM;
}
-#ifdef CONFIG_MEMCG_KMEM
/*
* page_objcgs - get the object cgroups vector associated with a page
* @page: a pointer to the page struct
@@ -579,6 +579,11 @@ static inline struct obj_cgroup **page_o
}
#else
+static inline bool PageMemcgKmem(struct page *page)
+{
+ return false;
+}
+
static inline struct obj_cgroup **page_objcgs(struct page *page)
{
return NULL;
_
Patches currently in -mm which might be from songmuchun@xxxxxxxxxxxxx are
mm-memcontrol-fix-kernel-stack-account.patch
mm-memcontrol-slab-fix-obtain-a-reference-to-a-freeing-memcg.patch
mm-memcontrol-introduce-obj_cgroup_uncharge_pages.patch
mm-memcontrol-directly-access-page-memcg_data-in-mm-page_allocc.patch
mm-memcontrol-change-ug-dummy_page-only-if-memcg-changed.patch
mm-memcontrol-use-obj_cgroup-apis-to-charge-kmem-pages.patch
mm-memcontrol-inline-__memcg_kmem_uncharge-into-obj_cgroup_uncharge_pages.patch
mm-memcontrol-move-pagememcgkmem-to-the-scope-of-config_memcg_kmem.patch
