sfc: fallback for lack of xdp tx queues
If there are not enough resources to allocate one TX queue per core for XDP TX it was completely disabled. This patch implements a fallback solution for sharing the available queues using __netif_tx_lock for synchronization. In the normal case that there is one TX queue per CPU, no locking is done, as it was before. With this fallback solution, XDP TX will work in much more cases that were failing, specially in machines with many CPUs. It's hard for XDP users to know what features are supported across different NICs and configurations, so they will benefit on having wider support. Signed-off-by:Íñigo Huguet <ihuguet@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
2a48d96f
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