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13 June 2022, 11:31:42 UTC
Revision 07841f9d94c11afe00c0498cf242edf4075729f4 authored by Ido Shamay on 30 April 2015, 14:32:46 UTC, committed by David S. Miller on 30 April 2015, 20:47:50 UTC 
net/mlx4_en: Schedule napi when RX buffers allocation fails
 
When system is out of memory, refilling of RX buffers fails while
the driver continue to pass the received packets to the kernel stack.
At some point, when all RX buffers deplete, driver may fall into a
sleep, and not recover when memory for new RX buffers is once again
availible. This is because hardware does not have valid descriptors,
so no interrupt will be generated for the driver to return to work
in napi context. Fix it by schedule the napi poll function from
stats_task delayed workqueue, as long as the allocations fail.

Signed-off-by: Ido Shamay <idos@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent c232d8a
History
Tip revision: 07841f9d94c11afe00c0498cf242edf4075729f4 authored by Ido Shamay on 30 April 2015, 14:32:46 UTC
net/mlx4_en: Schedule napi when RX buffers allocation fails
Tip revision: 07841f9
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