The patch titled
Subject: slab/slub: struct memcg_params
has been removed from the -mm tree. Its filename was
slab-slub-struct-memcg_params.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Glauber Costa <glommer@xxxxxxxxxxxxx>
Subject: slab/slub: struct memcg_params
For the kmem slab controller, we need to record some extra information in
the kmem_cache structure.
Signed-off-by: Glauber Costa <glommer@xxxxxxxxxxxxx>
Signed-off-by: Suleiman Souhlal <suleiman@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxxx>
Cc: Greg Thelen <gthelen@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: JoonSoo Kim <js1304@xxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/slab.h | 24 ++++++++++++++++++++++++
include/linux/slab_def.h | 3 +++
include/linux/slub_def.h | 3 +++
mm/slab.h | 13 +++++++++++++
4 files changed, 43 insertions(+)
diff -puN include/linux/slab.h~slab-slub-struct-memcg_params include/linux/slab.h
--- a/include/linux/slab.h~slab-slub-struct-memcg_params
+++ a/include/linux/slab.h
@@ -177,6 +177,30 @@ void kmem_cache_free(struct kmem_cache *
#endif
/*
+ * This is the main placeholder for memcg-related information in kmem caches.
+ * struct kmem_cache will hold a pointer to it, so the memory cost while
+ * disabled is 1 pointer. The runtime cost while enabled, gets bigger than it
+ * would otherwise be if that would be bundled in kmem_cache: we'll need an
+ * extra pointer chase. But the trade off clearly lays in favor of not
+ * penalizing non-users.
+ *
+ * Both the root cache and the child caches will have it. For the root cache,
+ * this will hold a dynamically allocated array large enough to hold
+ * information about the currently limited memcgs in the system.
+ *
+ * Child caches will hold extra metadata needed for its operation. Fields are:
+ *
+ * @memcg: pointer to the memcg this cache belongs to
+ */
+struct memcg_cache_params {
+ bool is_root_cache;
+ union {
+ struct kmem_cache *memcg_caches[0];
+ struct mem_cgroup *memcg;
+ };
+};
+
+/*
* Common kmalloc functions provided by all allocators
*/
void * __must_check __krealloc(const void *, size_t, gfp_t);
diff -puN include/linux/slab_def.h~slab-slub-struct-memcg_params include/linux/slab_def.h
--- a/include/linux/slab_def.h~slab-slub-struct-memcg_params
+++ a/include/linux/slab_def.h
@@ -81,6 +81,9 @@ struct kmem_cache {
*/
int obj_offset;
#endif /* CONFIG_DEBUG_SLAB */
+#ifdef CONFIG_MEMCG_KMEM
+ struct memcg_cache_params *memcg_params;
+#endif
/* 6) per-cpu/per-node data, touched during every alloc/free */
/*
diff -puN include/linux/slub_def.h~slab-slub-struct-memcg_params include/linux/slub_def.h
--- a/include/linux/slub_def.h~slab-slub-struct-memcg_params
+++ a/include/linux/slub_def.h
@@ -101,6 +101,9 @@ struct kmem_cache {
#ifdef CONFIG_SYSFS
struct kobject kobj; /* For sysfs */
#endif
+#ifdef CONFIG_MEMCG_KMEM
+ struct memcg_cache_params *memcg_params;
+#endif
#ifdef CONFIG_NUMA
/*
diff -puN mm/slab.h~slab-slub-struct-memcg_params mm/slab.h
--- a/mm/slab.h~slab-slub-struct-memcg_params
+++ a/mm/slab.h
@@ -100,4 +100,17 @@ void get_slabinfo(struct kmem_cache *s,
void slabinfo_show_stats(struct seq_file *m, struct kmem_cache *s);
ssize_t slabinfo_write(struct file *file, const char __user *buffer,
size_t count, loff_t *ppos);
+
+#ifdef CONFIG_MEMCG_KMEM
+static inline bool is_root_cache(struct kmem_cache *s)
+{
+ return !s->memcg_params || s->memcg_params->is_root_cache;
+}
+#else
+static inline bool is_root_cache(struct kmem_cache *s)
+{
+ return true;
+}
+
+#endif
#endif
_
Patches currently in -mm which might be from glommer@xxxxxxxxxxxxx are
origin.patch
memcg-debugging-facility-to-access-dangling-memcgs.patch
memcg-debugging-facility-to-access-dangling-memcgs-fix.patch
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