]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
nfp: remove ndo_poll_controller
authorEric Dumazet <edumazet@google.com>
Fri, 21 Sep 2018 22:27:51 +0000 (15:27 -0700)
committerDavid S. Miller <davem@davemloft.net>
Mon, 24 Sep 2018 04:55:25 +0000 (21:55 -0700)
commit0825ce70318e9c576acbdd5ceb4a8d563263cf8f
tree016b350ce146daf11fafe192006c1de6863b5fc3
parent58e0e22bff638055278ea73e34d0d07a95260790
nfp: remove ndo_poll_controller

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.

nfp 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: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Tested-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/netronome/nfp/nfp_net_common.c