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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>
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1 changed files with 2 additions and 3 deletions
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@ -353,15 +353,14 @@ int rds_send_xmit(struct rds_connection *conn)
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/*
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/*
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* Other senders will see we have c_send_lock and exit. We
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* Other senders will see we have c_send_lock and exit. We
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* need to recheck the send queue and race again for c_send_lock
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* need to recheck the send queue and race again for c_send_lock
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* to make sure messages don't just sit on the send queue.
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* to make sure messages don't just sit on the send queue, if
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* somebody hasn't already beat us into the loop.
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*
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*
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* If the transport cannot continue (i.e ret != 0), then it must
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* If the transport cannot continue (i.e ret != 0), then it must
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* call us when more room is available, such as from the tx
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* call us when more room is available, such as from the tx
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* completion handler.
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* completion handler.
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*/
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*/
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if (ret == 0) {
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if (ret == 0) {
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/* A simple bit test would be way faster than taking the
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* spin lock */
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smp_mb();
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smp_mb();
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if (!list_empty(&conn->c_send_queue)) {
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if (!list_empty(&conn->c_send_queue)) {
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rds_stats_inc(s_send_lock_queue_raced);
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rds_stats_inc(s_send_lock_queue_raced);
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