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-rw-r--r--include/linux/memcontrol.h17
-rw-r--r--init/Kconfig12
-rw-r--r--mm/debug.c5
-rw-r--r--mm/memcontrol.c15
-rw-r--r--mm/page_alloc.c12
5 files changed, 12 insertions, 49 deletions
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index c4d080875164..6ea9f919e888 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -173,10 +173,6 @@ static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
void mem_cgroup_split_huge_fixup(struct page *head);
#endif
-#ifdef CONFIG_DEBUG_VM
-bool mem_cgroup_bad_page_check(struct page *page);
-void mem_cgroup_print_bad_page(struct page *page);
-#endif
#else /* CONFIG_MEMCG */
struct mem_cgroup;
@@ -346,19 +342,6 @@ void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
}
#endif /* CONFIG_MEMCG */
-#if !defined(CONFIG_MEMCG) || !defined(CONFIG_DEBUG_VM)
-static inline bool
-mem_cgroup_bad_page_check(struct page *page)
-{
- return false;
-}
-
-static inline void
-mem_cgroup_print_bad_page(struct page *page)
-{
-}
-#endif
-
enum {
UNDER_LIMIT,
SOFT_LIMIT,
diff --git a/init/Kconfig b/init/Kconfig
index 46768752130d..7e9fbd48e2ab 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -983,18 +983,6 @@ config MEMCG
Provides a memory resource controller that manages both anonymous
memory and page cache. (See Documentation/cgroups/memory.txt)
- Note that setting this option increases fixed memory overhead
- associated with each page of memory in the system. By this,
- 8(16)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
- usage tracking struct at boot. Total amount of this is printed out
- at boot.
-
- Only enable when you're ok with these trade offs and really
- sure you need the memory resource controller. Even when you enable
- this, you can set "cgroup_disable=memory" at your boot option to
- disable memory resource controller and you can avoid overheads.
- (and lose benefits of memory resource controller)
-
config MEMCG_SWAP
bool "Memory Resource Controller Swap Extension"
depends on MEMCG && SWAP
diff --git a/mm/debug.c b/mm/debug.c
index 5ce45c9a29b5..0e58f3211f89 100644
--- a/mm/debug.c
+++ b/mm/debug.c
@@ -95,7 +95,10 @@ void dump_page_badflags(struct page *page, const char *reason,
dump_flags(page->flags & badflags,
pageflag_names, ARRAY_SIZE(pageflag_names));
}
- mem_cgroup_print_bad_page(page);
+#ifdef CONFIG_MEMCG
+ if (page->mem_cgroup)
+ pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup);
+#endif
}
void dump_page(struct page *page, const char *reason)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index ab270e34ba3e..1869cb64d089 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3157,21 +3157,6 @@ static inline int mem_cgroup_move_swap_account(swp_entry_t entry,
}
#endif
-#ifdef CONFIG_DEBUG_VM
-bool mem_cgroup_bad_page_check(struct page *page)
-{
- if (mem_cgroup_disabled())
- return false;
-
- return page->mem_cgroup != NULL;
-}
-
-void mem_cgroup_print_bad_page(struct page *page)
-{
- pr_alert("page->mem_cgroup:%p\n", page->mem_cgroup);
-}
-#endif
-
static DEFINE_MUTEX(memcg_limit_mutex);
static int mem_cgroup_resize_limit(struct mem_cgroup *memcg,
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 22cfdeffbf69..a7198c065999 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -640,8 +640,10 @@ static inline int free_pages_check(struct page *page)
bad_reason = "PAGE_FLAGS_CHECK_AT_FREE flag(s) set";
bad_flags = PAGE_FLAGS_CHECK_AT_FREE;
}
- if (unlikely(mem_cgroup_bad_page_check(page)))
- bad_reason = "cgroup check failed";
+#ifdef CONFIG_MEMCG
+ if (unlikely(page->mem_cgroup))
+ bad_reason = "page still charged to cgroup";
+#endif
if (unlikely(bad_reason)) {
bad_page(page, bad_reason, bad_flags);
return 1;
@@ -900,8 +902,10 @@ static inline int check_new_page(struct page *page)
bad_reason = "PAGE_FLAGS_CHECK_AT_PREP flag set";
bad_flags = PAGE_FLAGS_CHECK_AT_PREP;
}
- if (unlikely(mem_cgroup_bad_page_check(page)))
- bad_reason = "cgroup check failed";
+#ifdef CONFIG_MEMCG
+ if (unlikely(page->mem_cgroup))
+ bad_reason = "page still charged to cgroup";
+#endif
if (unlikely(bad_reason)) {
bad_page(page, bad_reason, bad_flags);
return 1;

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