21627982e4
As diagnosed by Song Liu, ndo_poll_controller() can be very dangerous on loaded hosts, since the cpu calling ndo_poll_controller() might steal all NAPI contexts (for all RX/TX queues of the NIC). This capture can last for unlimited amount of time, since one cpu is generally not able to drain all the queues under load. ena uses NAPI for TX completions, so we better let core networking stack call the napi->poll() to avoid the capture. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Netanel Belgazal <netanel@amazon.com> Cc: Saeed Bishara <saeedb@amazon.com> Cc: Zorik Machulsky <zorik@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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