From: Christoph Lameter <cl@linux.com>
To: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <js1304@gmail.com>,
Glauber Costa <glommer@parallels.com>,
linux-mm@kvack.org, David Rientjes <rientjes@google.com>
Subject: C12 [11/19] Move sysfs_slab_add to common
Date: Mon, 20 Aug 2012 20:50:37 +0000 [thread overview]
Message-ID: <0000013945cd2c3e-98e825e1-bade-43c6-b657-a54cec84d4dd-000000@email.amazonses.com> (raw)
In-Reply-To: <20120820204021.494276880@linux.com>
Simplify locking by moving the slab_add_sysfs after all locks
have been dropped. Eases the upcoming move to provide sysfs
support for all allocators.
Signed-off-by: Christoph Lameter <cl@linux.com>
---
mm/slab.h | 3 +++
mm/slab_common.c | 8 ++++++++
mm/slub.c | 15 ++-------------
3 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/mm/slab.h b/mm/slab.h
index 84c28f4..ec7b944 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -39,10 +39,13 @@ struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
#ifdef CONFIG_SLUB
struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
size_t align, unsigned long flags, void (*ctor)(void *));
+extern int sysfs_slab_add(struct kmem_cache *s);
#else
static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
size_t align, unsigned long flags, void (*ctor)(void *))
{ return NULL; }
+static inline int sysfs_slab_add(struct kmem_cache *s) { return 0; }
+
#endif
diff --git a/mm/slab_common.c b/mm/slab_common.c
index e5cd47f..ec93056 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -152,6 +152,14 @@ out_locked:
return NULL;
}
+ if (s->refcount == 1) {
+ err = sysfs_slab_add(s);
+ if (err)
+ printk(KERN_WARNING "kmem_cache_create(%s) failed to"
+ " create sysfs entry. Error %d\n",
+ name, err);
+ }
+
return s;
}
EXPORT_SYMBOL(kmem_cache_create);
diff --git a/mm/slub.c b/mm/slub.c
index 5751f30..5e37c89 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -202,12 +202,10 @@ struct track {
enum track_item { TRACK_ALLOC, TRACK_FREE };
#ifdef CONFIG_SYSFS
-static int sysfs_slab_add(struct kmem_cache *);
static int sysfs_slab_alias(struct kmem_cache *, const char *);
static void sysfs_slab_remove(struct kmem_cache *);
#else
-static inline int sysfs_slab_add(struct kmem_cache *s) { return 0; }
static inline int sysfs_slab_alias(struct kmem_cache *s, const char *p)
{ return 0; }
static inline void sysfs_slab_remove(struct kmem_cache *s) { }
@@ -3955,16 +3953,7 @@ struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
if (s) {
if (kmem_cache_open(s, name,
size, align, flags, ctor)) {
- int r;
-
- mutex_unlock(&slab_mutex);
- r = sysfs_slab_add(s);
- mutex_lock(&slab_mutex);
-
- if (!r)
- return s;
-
- kmem_cache_close(s);
+ return s;
}
kmem_cache_free(kmem_cache, s);
}
@@ -5258,7 +5247,7 @@ static char *create_unique_id(struct kmem_cache *s)
return name;
}
-static int sysfs_slab_add(struct kmem_cache *s)
+int sysfs_slab_add(struct kmem_cache *s)
{
int err;
const char *name;
--
1.7.9.5
--
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next prev parent reply other threads:[~2012-08-20 20:50 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20120820204021.494276880@linux.com>
2012-08-20 20:47 ` C12 [01/19] slub: Add debugging to verify correct cache use on kmem_cache_free() Christoph Lameter
2012-08-20 20:50 ` C12 [05/19] Extract a common function for kmem_cache_destroy Christoph Lameter
2012-08-20 20:50 ` C12 [03/19] Improve error handling in kmem_cache_create Christoph Lameter
2012-08-20 20:50 ` C12 [04/19] Move list_add() to slab_common.c Christoph Lameter
2012-08-20 20:50 ` C12 [01/19] slub: Add debugging to verify correct cache use on kmem_cache_free() Christoph Lameter
2012-08-20 20:50 ` C12 [02/19] slub: Use kmem_cache for the kmem_cache structure Christoph Lameter
2012-08-20 20:50 ` C12 [06/19] Always use the name "kmem_cache" for the slab cache with " Christoph Lameter
2012-08-20 20:50 ` Christoph Lameter [this message]
2012-08-20 20:50 ` C12 [07/19] Move freeing of kmem_cache structure to common code Christoph Lameter
2012-08-20 20:50 ` C12 [12/19] Move kmem_cache allocations into " Christoph Lameter
2012-08-21 11:55 ` Glauber Costa
2012-08-21 20:58 ` Christoph Lameter
2012-08-22 8:42 ` Glauber Costa
2012-08-22 15:25 ` Christoph Lameter
2012-08-23 7:43 ` Glauber Costa
2012-08-23 13:49 ` Christoph Lameter
2012-08-23 13:57 ` Glauber Costa
2012-08-23 14:31 ` Christoph Lameter
2012-08-20 20:50 ` C12 [09/19] Move duping of slab name to slab_common.c Christoph Lameter
2012-08-20 20:50 ` C12 [10/19] Do slab aliasing call from common code Christoph Lameter
2012-08-20 20:50 ` C12 [13/19] Shrink __kmem_cache_create() parameter lists Christoph Lameter
2012-08-20 20:50 ` C12 [08/19] Get rid of __kmem_cache_destroy Christoph Lameter
2012-08-20 20:50 ` C12 [17/19] slub: Use a statically allocated kmem_cache boot structure for bootstrap Christoph Lameter
2012-08-20 20:50 ` C12 [16/19] Create common functions for boot slab creation Christoph Lameter
2012-08-22 9:26 ` Glauber Costa
2012-08-22 15:35 ` Christoph Lameter
2012-08-23 8:09 ` Glauber Costa
2012-08-23 13:58 ` Christoph Lameter
2012-08-20 20:50 ` C12 [14/19] Move kmem_cache refcounting to common code Christoph Lameter
2012-08-20 21:01 ` C12 [15/19] slab: Simplify bootstrap Christoph Lameter
2012-08-20 21:01 ` C12 [19/19] Common alignment code Christoph Lameter
2012-08-20 21:01 ` C12 [18/19] slab: Use the new create_boot_cache function to simplify bootstrap Christoph Lameter
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