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[PATCH] IB: Optimize canceling a MAD 

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>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Hal Rosenstock 2005-07-27 11:45:32 -07:00 committed by Linus Torvalds
parent 03b61ad2f2
commit 29bb33dd87
1 changed files with 13 additions and 8 deletions
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21
drivers/infiniband/core/mad.c
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@ -1754,14 +1754,18 @@ static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr)
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);