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authorAlex Elder <elder@inktank.com>2013-05-01 12:43:04 -0500
committerAlex Elder <elder@inktank.com>2013-05-02 11:58:36 -0500
commit81b36be4c56299ac4c4c786908cb117ad232b62e (patch)
treef1b37087eabc44310bb1a82f4246f5ca0704ebb3 /net/ceph
parente3d5d6380482b4a5e2e9d0d662f2ef6d56504aef (diff)
libceph: allocate ceph message data with a slab allocator
Create a slab cache to manage ceph_msg_data structure allocation. 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 'net/ceph')
-rw-r--r--net/ceph/messenger.c26
1 files changed, 23 insertions, 3 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index bc1ba4c2605d..eb0a46a49bd4 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -155,6 +155,7 @@ static bool con_flag_test_and_set(struct ceph_connection *con,
/* Slab caches for frequently-allocated structures */
static struct kmem_cache *ceph_msg_cache;
+static struct kmem_cache *ceph_msg_data_cache;
/* static tag bytes (protocol control messages) */
static char tag_msg = CEPH_MSGR_TAG_MSG;
@@ -236,11 +237,30 @@ static int ceph_msgr_slab_init(void)
ceph_msg_cache = kmem_cache_create("ceph_msg",
sizeof (struct ceph_msg),
__alignof__(struct ceph_msg), 0, NULL);
- return ceph_msg_cache ? 0 : -ENOMEM;
+
+ if (!ceph_msg_cache)
+ return -ENOMEM;
+
+ BUG_ON(ceph_msg_data_cache);
+ ceph_msg_data_cache = kmem_cache_create("ceph_msg_data",
+ sizeof (struct ceph_msg_data),
+ __alignof__(struct ceph_msg_data),
+ 0, NULL);
+ if (ceph_msg_data_cache)
+ return 0;
+
+ kmem_cache_destroy(ceph_msg_cache);
+ ceph_msg_cache = NULL;
+
+ return -ENOMEM;
}
static void ceph_msgr_slab_exit(void)
{
+ BUG_ON(!ceph_msg_data_cache);
+ kmem_cache_destroy(ceph_msg_data_cache);
+ ceph_msg_data_cache = NULL;
+
BUG_ON(!ceph_msg_cache);
kmem_cache_destroy(ceph_msg_cache);
ceph_msg_cache = NULL;
@@ -3008,7 +3028,7 @@ static struct ceph_msg_data *ceph_msg_data_create(enum ceph_msg_data_type type)
if (WARN_ON(!ceph_msg_data_type_valid(type)))
return NULL;
- data = kzalloc(sizeof (*data), GFP_NOFS);
+ data = kmem_cache_zalloc(ceph_msg_data_cache, GFP_NOFS);
if (data)
data->type = type;
INIT_LIST_HEAD(&data->links);
@@ -3026,7 +3046,7 @@ static void ceph_msg_data_destroy(struct ceph_msg_data *data)
ceph_pagelist_release(data->pagelist);
kfree(data->pagelist);
}
- kfree(data);
+ kmem_cache_free(ceph_msg_data_cache, data);
}
void ceph_msg_data_add_pages(struct ceph_msg *msg, struct page **pages,

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