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| author | Michael S. Tsirkin <mst@dev.mellanox.co.il> | 2007-05-14 07:26:51 +0300 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2007-05-14 14:11:01 -0700 |
| commit | 7c5b9ef8577bfa7b74ea58fc9ff2934ffce13532 (patch) | |
| tree | 4a39ad8609225261bc17f4acc16447944d875a12 /drivers/infiniband/ulp | |
| parent | bd18c112774db5bb887adb981ffbe9bfe00b2f3a (diff) | |
| download | blackbird-op-linux-7c5b9ef8577bfa7b74ea58fc9ff2934ffce13532.tar.gz blackbird-op-linux-7c5b9ef8577bfa7b74ea58fc9ff2934ffce13532.zip | |
IPoIB/cm: Optimize stale connection detection
In the presence of some running RX connections, we repeat
queue_delayed_work calls each 4 RX WRs, which is a waste. It's enough
to start stale task when a first passive connection is added, and
rerun it every IPOIB_CM_RX_DELAY as long as there are outstanding
passive connections.
This removes some code from RX data path.
Signed-off-by: Michael S. Tsirkin <mst@dev.mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/ulp')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_cm.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c index 785bc8505f2a..eec833b81e9b 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c @@ -257,10 +257,11 @@ static int ipoib_cm_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *even cm_id->context = p; p->jiffies = jiffies; spin_lock_irq(&priv->lock); + if (list_empty(&priv->cm.passive_ids)) + queue_delayed_work(ipoib_workqueue, + &priv->cm.stale_task, IPOIB_CM_RX_DELAY); list_add(&p->list, &priv->cm.passive_ids); spin_unlock_irq(&priv->lock); - queue_delayed_work(ipoib_workqueue, - &priv->cm.stale_task, IPOIB_CM_RX_DELAY); return 0; err_rep: @@ -378,8 +379,6 @@ void ipoib_cm_handle_rx_wc(struct net_device *dev, struct ib_wc *wc) if (!list_empty(&p->list)) list_move(&p->list, &priv->cm.passive_ids); spin_unlock_irqrestore(&priv->lock, flags); - queue_delayed_work(ipoib_workqueue, - &priv->cm.stale_task, IPOIB_CM_RX_DELAY); } } @@ -1100,6 +1099,10 @@ static void ipoib_cm_stale_task(struct work_struct *work) kfree(p); spin_lock_irq(&priv->lock); } + + if (!list_empty(&priv->cm.passive_ids)) + queue_delayed_work(ipoib_workqueue, + &priv->cm.stale_task, IPOIB_CM_RX_DELAY); spin_unlock_irq(&priv->lock); } |
