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RDS: Update comments in rds_send_xmit() 

Update comments to reflect changes in previous commit.

Keeping as separate commits due to different authorship.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
This commit is contained in:
Andy Grover 2010-04-15 17:19:29 -07:00
parent 9e29db0e36
commit ce47f52f42
1 changed files with 2 additions and 3 deletions
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5
net/rds/send.c
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@ -353,15 +353,14 @@ int rds_send_xmit(struct rds_connection *conn)
/* /*
* Other senders will see we have c_send_lock and exit. We * Other senders will see we have c_send_lock and exit. We
* need to recheck the send queue and race again for c_send_lock * need to recheck the send queue and race again for c_send_lock
* to make sure messages don't just sit on the send queue. * to make sure messages don't just sit on the send queue, if
* somebody hasn't already beat us into the loop.
* *
* If the transport cannot continue (i.e ret != 0), then it must * If the transport cannot continue (i.e ret != 0), then it must
* call us when more room is available, such as from the tx * call us when more room is available, such as from the tx
* completion handler. * completion handler.
*/ */
if (ret == 0) { if (ret == 0) {
/* A simple bit test would be way faster than taking the
* spin lock */
smp_mb(); smp_mb();
if (!list_empty(&conn->c_send_queue)) { if (!list_empty(&conn->c_send_queue)) {
rds_stats_inc(s_send_lock_queue_raced); rds_stats_inc(s_send_lock_queue_raced);