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authorAndy Grover <andy.grover@oracle.com>2010-03-23 17:39:07 -0700
committerAndy Grover <andy.grover@oracle.com>2010-09-08 18:12:12 -0700
commit049ee3f500954176a87f22e6ee3e98aecb1b8958 (patch)
tree5dfd8cf3e6d9a7a15e80f6ddee7f4ce7c4aa7a8c /net/rds/stats.c
parentf17a1a55fb672d7f64be7f2e940ef5669e5efa0a (diff)
downloadop-kernel-dev-049ee3f500954176a87f22e6ee3e98aecb1b8958.zip
op-kernel-dev-049ee3f500954176a87f22e6ee3e98aecb1b8958.tar.gz
RDS: Change send lock from a mutex to a spinlock
This change allows us to call rds_send_xmit() from a tasklet, which is crucial to our new operating model. * Change c_send_lock to a spinlock * Update stats fields "sem_" to "_lock" * Remove unneeded rds_conn_is_sending() About locking between shutdown and send -- send checks if the connection is up. Shutdown puts the connection into DISCONNECTING. After this, all threads entering send will exit immediately. However, a thread could be *in* send_xmit(), so shutdown acquires the c_send_lock to ensure everyone is out before proceeding with connection shutdown. Signed-off-by: Andy Grover <andy.grover@oracle.com>
Diffstat (limited to 'net/rds/stats.c')
-rw-r--r--net/rds/stats.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/rds/stats.c b/net/rds/stats.c
index c66d95d..b77be8b 100644
--- a/net/rds/stats.c
+++ b/net/rds/stats.c
@@ -57,8 +57,8 @@ static const char *const rds_stat_names[] = {
"recv_ping",
"send_queue_empty",
"send_queue_full",
- "send_sem_contention",
- "send_sem_queue_raced",
+ "send_lock_contention",
+ "send_lock_queue_raced",
"send_immediate_retry",
"send_delayed_retry",
"send_drop_acked",
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