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| author |   Eric Dumazet <edumazet@google.com> | 2018-09-21 15:27:42 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-09-23 21:55:24 -0700 |
| commit | dda9d57e2d4245c0d8e309ee7399bf2ebfca64ae (patch) | |
| tree | 7cd28c9349e1755f1ed2ff22496d94b2806691dc /drivers/net/ethernet/intel/fm10k/fm10k_pci.c | |
| parent | ixgbevf: remove ndo_poll_controller (diff) | |
| download | linux-dev-dda9d57e2d4245c0d8e309ee7399bf2ebfca64ae.tar.xz linux-dev-dda9d57e2d4245c0d8e309ee7399bf2ebfca64ae.zip | |
fm10k: 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
lasts for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.
fm10k 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: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c index 15071e4adb98..c859ababeed5 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c @@ -1210,28 +1210,6 @@ static irqreturn_t fm10k_msix_mbx_vf(int __always_unused irq, void *data) return IRQ_HANDLED; } -#ifdef CONFIG_NET_POLL_CONTROLLER -/** - * fm10k_netpoll - A Polling 'interrupt' handler - * @netdev: network interface device structure - * - * This is used by netconsole to send skbs without having to re-enable - * interrupts. It's not called while the normal interrupt routine is executing. - **/ -void fm10k_netpoll(struct net_device *netdev) -{ - struct fm10k_intfc *interface = netdev_priv(netdev); - int i; - - /* if interface is down do nothing */ - if (test_bit(__FM10K_DOWN, interface->state)) - return; - - for (i = 0; i < interface->num_q_vectors; i++) - fm10k_msix_clean_rings(0, interface->q_vector[i]); -} - -#endif #define FM10K_ERR_MSG(type) case (type): error = #type; break static void fm10k_handle_fault(struct fm10k_intfc *interface, int type, struct fm10k_fault *fault) |