From: Mandeep Singh Baines <[EMAIL PROTECTED]> Date: Tue, 28 Aug 2007 15:47:18 -0700
> It seems that some drivers do not immediately free skbs on transmit > complete. They will hold the skb until there are more packets to > free. One example is the sis900 driver which uses TX_IDLE (tx > state-machine idle) instead of TX_OK (tx completed) as a way of > coalescing interrupts. I've also seen another driver which does > something similar. Not sure how prevalent this technique is. > > So is this a bug in the drivers or a bug in pktgen? This is a bug since it can stall TCP sockets, and even non-TCP sockets will not be freeable until these SKBs are released by the device. All transmit packets must be released in a finite amount of time by the driver without requiring more traffic to induce this release. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
