diff options
author | Alex Elder <elder@inktank.com> | 2013-05-01 17:43:03 (GMT) |
---|---|---|
committer | Alex Elder <elder@inktank.com> | 2013-05-02 16:58:29 (GMT) |
commit | 1c2a9dfe2107e81b9f0ee90845c687cf7ff84106 (patch) | |
tree | e3d81737000df3bc76ed51b46f2963df7a25f45c /drivers | |
parent | 30d1cff817808fca9801c743d2de4c61f3f38e15 (diff) | |
download | linux-fsl-qoriq-1c2a9dfe2107e81b9f0ee90845c687cf7ff84106.tar.xz |
rbd: allocate image requests with a slab allocator
Create a slab cache to manage rbd_img_request allocation. Nothing
too fancy at this point--we'll still initialize everything at
allocation time (no constructor)
This is part of:
http://tracker.ceph.com/issues/3926
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/block/rbd.c | 39 |
1 files changed, 34 insertions, 5 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 82d9586..e90abde 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -40,6 +40,7 @@ #include <linux/module.h> #include <linux/fs.h> #include <linux/blkdev.h> +#include <linux/slab.h> #include "rbd_types.h" @@ -344,6 +345,8 @@ static DEFINE_SPINLOCK(rbd_dev_list_lock); static LIST_HEAD(rbd_client_list); /* clients */ static DEFINE_SPINLOCK(rbd_client_list_lock); +static struct kmem_cache *rbd_img_request_cache; + static int rbd_img_request_submit(struct rbd_img_request *img_request); static void rbd_dev_device_release(struct device *dev); @@ -1821,7 +1824,7 @@ static struct rbd_img_request *rbd_img_request_create( { struct rbd_img_request *img_request; - img_request = kmalloc(sizeof (*img_request), GFP_ATOMIC); + img_request = kmem_cache_alloc(rbd_img_request_cache, GFP_ATOMIC); if (!img_request) return NULL; @@ -1884,7 +1887,7 @@ static void rbd_img_request_destroy(struct kref *kref) if (img_request_child_test(img_request)) rbd_obj_request_put(img_request->obj_request); - kfree(img_request); + kmem_cache_free(rbd_img_request_cache, img_request); } static bool rbd_img_obj_end_request(struct rbd_obj_request *obj_request) @@ -4992,6 +4995,26 @@ static void rbd_sysfs_cleanup(void) device_unregister(&rbd_root_dev); } +static int rbd_slab_init(void) +{ + rbd_assert(!rbd_img_request_cache); + rbd_img_request_cache = kmem_cache_create("rbd_img_request", + sizeof (struct rbd_img_request), + __alignof__(struct rbd_img_request), + 0, NULL); + if (rbd_img_request_cache) + return 0; + + return -ENOMEM; +} + +static void rbd_slab_exit(void) +{ + rbd_assert(rbd_img_request_cache); + kmem_cache_destroy(rbd_img_request_cache); + rbd_img_request_cache = NULL; +} + static int __init rbd_init(void) { int rc; @@ -5001,16 +5024,22 @@ static int __init rbd_init(void) return -EINVAL; } - rc = rbd_sysfs_init(); + rc = rbd_slab_init(); if (rc) return rc; - pr_info("loaded " RBD_DRV_NAME_LONG "\n"); - return 0; + rc = rbd_sysfs_init(); + if (rc) + rbd_slab_exit(); + else + pr_info("loaded " RBD_DRV_NAME_LONG "\n"); + + return rc; } static void __exit rbd_exit(void) { rbd_sysfs_cleanup(); + rbd_slab_exit(); } module_init(rbd_init); |