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authorAlex Elder <elder@inktank.com>2013-05-01 12:43:04 -0500
committerAlex Elder <elder@inktank.com>2013-05-02 11:58:31 -0500
commite3d5d6380482b4a5e2e9d0d662f2ef6d56504aef (patch)
treed71655db3cb326d263e9be8b9837dcc7027d9dfd /net/ceph/messenger.c
parent78c2a44aae2950ecf0279590572b861288714946 (diff)
libceph: allocate ceph messages with a slab allocator
Create a slab cache to manage ceph_msg 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/messenger.c')
-rw-r--r--net/ceph/messenger.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 91dd45113c7b..bc1ba4c2605d 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -152,6 +152,10 @@ static bool con_flag_test_and_set(struct ceph_connection *con,
return test_and_set_bit(con_flag, &con->flags);
}
+/* Slab caches for frequently-allocated structures */
+
+static struct kmem_cache *ceph_msg_cache;
+
/* static tag bytes (protocol control messages) */
static char tag_msg = CEPH_MSGR_TAG_MSG;
static char tag_ack = CEPH_MSGR_TAG_ACK;
@@ -226,6 +230,22 @@ static void encode_my_addr(struct ceph_messenger *msgr)
*/
static struct workqueue_struct *ceph_msgr_wq;
+static int ceph_msgr_slab_init(void)
+{
+ BUG_ON(ceph_msg_cache);
+ ceph_msg_cache = kmem_cache_create("ceph_msg",
+ sizeof (struct ceph_msg),
+ __alignof__(struct ceph_msg), 0, NULL);
+ return ceph_msg_cache ? 0 : -ENOMEM;
+}
+
+static void ceph_msgr_slab_exit(void)
+{
+ BUG_ON(!ceph_msg_cache);
+ kmem_cache_destroy(ceph_msg_cache);
+ ceph_msg_cache = NULL;
+}
+
static void _ceph_msgr_exit(void)
{
if (ceph_msgr_wq) {
@@ -233,6 +253,8 @@ static void _ceph_msgr_exit(void)
ceph_msgr_wq = NULL;
}
+ ceph_msgr_slab_exit();
+
BUG_ON(zero_page == NULL);
kunmap(zero_page);
page_cache_release(zero_page);
@@ -245,6 +267,9 @@ int ceph_msgr_init(void)
zero_page = ZERO_PAGE(0);
page_cache_get(zero_page);
+ if (ceph_msgr_slab_init())
+ return -ENOMEM;
+
ceph_msgr_wq = alloc_workqueue("ceph-msgr", WQ_NON_REENTRANT, 0);
if (ceph_msgr_wq)
return 0;
@@ -3068,7 +3093,7 @@ struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags,
{
struct ceph_msg *m;
- m = kzalloc(sizeof(*m), flags);
+ m = kmem_cache_zalloc(ceph_msg_cache, flags);
if (m == NULL)
goto out;
@@ -3215,7 +3240,7 @@ void ceph_msg_kfree(struct ceph_msg *m)
vfree(m->front.iov_base);
else
kfree(m->front.iov_base);
- kfree(m);
+ kmem_cache_free(ceph_msg_cache, m);
}
/*

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