virtio_net: skip RCU read lock by checking xdp_enabled of vi

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networking benchmark shows that __rcu_read_lock and
__rcu_read_unlock takes some cpu cycles, and we can avoid
calling them partially in virtio rx path by check xdp_enabled
of vi, and xdp is disabled most of time

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Li RongQing 2021-10-09 17:32:43 +08:00 • committed by David S. Miller

parent c0288ae8e6

commit 6213f07cb5

1 changed files with 14 additions and 0 deletions

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drivers/net/virtio_net.c

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