memcg: kill CONFIG_MM_OWNER
CONFIG_MM_OWNER makes no sense. It is not user-selectable, it is only
selected by CONFIG_MEMCG automatically. So we can kill this option in
init/Kconfig and do s/CONFIG_MM_OWNER/CONFIG_MEMCG/ globally.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 8967e20..de16272 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -406,7 +406,7 @@
spinlock_t ioctx_lock;
struct kioctx_table __rcu *ioctx_table;
#endif
-#ifdef CONFIG_MM_OWNER
+#ifdef CONFIG_MEMCG
/*
* "owner" points to a task that is regarded as the canonical
* user/owner of this mm. All of the following must be true in
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 70f67e4..2f2dd7d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2967,7 +2967,7 @@
#define TASK_SIZE_OF(tsk) TASK_SIZE
#endif
-#ifdef CONFIG_MM_OWNER
+#ifdef CONFIG_MEMCG
extern void mm_update_next_owner(struct mm_struct *mm);
extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);
#else
@@ -2978,7 +2978,7 @@
static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
{
}
-#endif /* CONFIG_MM_OWNER */
+#endif /* CONFIG_MEMCG */
static inline unsigned long task_rlimit(const struct task_struct *tsk,
unsigned int limit)
diff --git a/init/Kconfig b/init/Kconfig
index 4a1822a..0a2f09a 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -933,7 +933,6 @@
config MEMCG
bool "Memory Resource Controller for Control Groups"
depends on RESOURCE_COUNTERS
- select MM_OWNER
select EVENTFD
help
Provides a memory resource controller that manages both anonymous
@@ -951,9 +950,6 @@
disable memory resource controller and you can avoid overheads.
(and lose benefits of memory resource controller)
- This config option also selects MM_OWNER config option, which
- could in turn add some fork/exit overhead.
-
config MEMCG_SWAP
bool "Memory Resource Controller Swap Extension"
depends on MEMCG && SWAP
@@ -1179,9 +1175,6 @@
desktop applications. Task group autogeneration is currently based
upon task session.
-config MM_OWNER
- bool
-
config SYSFS_DEPRECATED
bool "Enable deprecated sysfs features to support old userspace tools"
depends on SYSFS
diff --git a/kernel/exit.c b/kernel/exit.c
index 6ed6a1d..da1b838 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -352,7 +352,7 @@
EXPORT_SYMBOL(disallow_signal);
-#ifdef CONFIG_MM_OWNER
+#ifdef CONFIG_MEMCG
/*
* A task is exiting. If it owned this mm, find a new owner for the mm.
*/
@@ -434,7 +434,7 @@
task_unlock(c);
put_task_struct(c);
}
-#endif /* CONFIG_MM_OWNER */
+#endif /* CONFIG_MEMCG */
/*
* Turn us into a lazy TLB process if we
diff --git a/kernel/fork.c b/kernel/fork.c
index 59e3dcc..0d53eb0 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1099,12 +1099,12 @@
#endif
}
-#ifdef CONFIG_MM_OWNER
+#ifdef CONFIG_MEMCG
void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
{
mm->owner = p;
}
-#endif /* CONFIG_MM_OWNER */
+#endif /* CONFIG_MEMCG */
/*
* Initialize POSIX timer handling for a single task.