From: Hal Rosenstock <halr@voltaire.com>
Optimize canceling a MAD.
- Eliminate searching timeout list in cancel case.
- Remove duplicate calls to queue work item.
- Eliminate resending a MAD before MAD is completed.
Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Hal Rosenstock <halr@voltaire.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
drivers/infiniband/core/mad.c | 21 +++++++++++++--------
1 files changed, 13 insertions(+), 8 deletions(-)
diff -puN drivers/infiniband/core/mad.c~ib-optimize-canceling-a-mad drivers/infiniband/core/mad.c
--- 25/drivers/infiniband/core/mad.c~ib-optimize-canceling-a-mad Mon Jul 11 17:06:39 2005
+++ 25-akpm/drivers/infiniband/core/mad.c Mon Jul 11 17:06:39 2005
@@ -1754,14 +1754,18 @@ static void wait_for_response(struct ib_
delay = mad_send_wr->timeout;
mad_send_wr->timeout += jiffies;
- list_for_each_prev(list_item, &mad_agent_priv->wait_list) {
- temp_mad_send_wr = list_entry(list_item,
- struct ib_mad_send_wr_private,
- agent_list);
- if (time_after(mad_send_wr->timeout,
- temp_mad_send_wr->timeout))
- break;
+ if (delay) {
+ list_for_each_prev(list_item, &mad_agent_priv->wait_list) {
+ temp_mad_send_wr = list_entry(list_item,
+ struct ib_mad_send_wr_private,
+ agent_list);
+ if (time_after(mad_send_wr->timeout,
+ temp_mad_send_wr->timeout))
+ break;
+ }
}
+ else
+ list_item = &mad_agent_priv->wait_list;
list_add(&mad_send_wr->agent_list, list_item);
/* Reschedule a work item if we have a shorter timeout */
@@ -2197,7 +2201,8 @@ static void timeout_sends(void *data)
}
list_del(&mad_send_wr->agent_list);
- if (!retry_send(mad_send_wr))
+ if (mad_send_wr->status == IB_WC_SUCCESS &&
+ !retry_send(mad_send_wr))
continue;
spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
_