net_rx_action() query in dev.c?

["pradeep singh" <2500.pradeep@xxxxxxxxx>]

Hi All,

I was going through the implementation code for net_rx_action, whcih
is invoked everytime the NET_RX_SOFTIRQ gets to run.

The logic at line number 1916 in file net/core/dev.c is -

  while(!list_empty(&queue->poll_list)) {
    /*something here*/
     if(budget <= 0 || jiffies  - start_time > 1)  <- line 1916
         goto softnet_break;

   /*something here*/
  }

if budget <= 0 we must go to softnet_break is understandable but why
if budget is > 0 we must check for the time elapsed??
And if the difference is > 1, why we should goto softnet_break?

I didn't quite get it.

Any help?

Thanks
~psr

--
play the game

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