From: Benjamin Poirier Date: Fri, 13 Jan 2017 01:04:14 +0000 (-0800) Subject: i40e: Invoke softirqs after napi_reschedule X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=83a0c6e589017ce737720b9e05e2fa3fe4f7b860;p=openwrt%2Fstaging%2Fblogic.git i40e: Invoke softirqs after napi_reschedule The following message is logged from time to time when using i40e: NOHZ: local_softirq_pending 08 i40e may schedule napi from a workqueue. Afterwards, softirqs are not run in a deterministic time frame. The problem is the same as what was described in commit ec13ee80145c ("virtio_net: invoke softirqs after __napi_schedule") and this patch applies the same fix to i40e. Signed-off-by: Benjamin Poirier Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index b0215c1159fe..e8a8351c8ea9 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -4685,8 +4685,10 @@ static void i40e_detect_recover_hung_queue(int q_idx, struct i40e_vsi *vsi) */ if ((!tx_pending_hw) && i40e_get_tx_pending(tx_ring, true) && (!(val & I40E_PFINT_DYN_CTLN_INTENA_MASK))) { + local_bh_disable(); if (napi_reschedule(&tx_ring->q_vector->napi)) tx_ring->tx_stats.tx_lost_interrupt++; + local_bh_enable(); } }