Hi Marek,
Sorry for late reply. We have tried to simulate dev_alloc_skb() failure on our reference platform after 100th, 200th, 300th etc. packets. Our observation is when the failure occurs, corresponding URB won't get submitted, but traffic continues. Traffic stops when the failure count reaches 6 (mwifiex Rx URB count). We don't see any crash or system unresponsiveness.
> I did small investigation (will my limited networking knowledge :)) and
> to avoid usb issue I did small hack to free received packet in skb
> (with specific size
> 1574 which sends iperf) before sending for processing to driver
> workqueue. With this small hack I can run iperf -b100m on client size
> without any allocation issue.
That's good :) Actually kernel will take care of freeing skb when driver submits received packet using netif_rx(). Could you please share your hack?
Regards,
Amit
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