Optimize call to net_tx_action only if work is pending.
Patch against net-2.6.22.git
Signed-off-by: Krishna Kumar <[EMAIL PROTECTED]>
---
diff -ruNp org/net/core/dev.c new/net/core/dev.c
--- org/net/core/dev.c 2007-04-09 12:43:15.000000000 +0530
+++ new/net/core/dev.c 2007-04-09 12:43:42.000000000 +0530
@@ -3474,7 +3474,8 @@ static int dev_cpu_callback(struct notif
*list_net = oldsd->output_queue;
oldsd->output_queue = NULL;
- raise_softirq_irqoff(NET_TX_SOFTIRQ);
+ if (sd->completion_queue || sd->output_queue)
+ raise_softirq_irqoff(NET_TX_SOFTIRQ);
local_irq_enable();
/* Process offline CPU's input_pkt_queue */
-
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