Commit 9a660eea authored by Jesse Brandeburg's avatar Jesse Brandeburg Committed by Jeff Kirsher

i40e: fix XPS mask when resetting

During resets (possibly caused by a Tx hang) the driver would
accidentally clear the XPS mask for all queues back to 0.

This caused higher CPU utilization and had some other performance impacts
for transmit tests.

Change-ID: I95f112432c9e643a153eaa31cd28cdcbfdd01831
Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent ce7ca751
......@@ -2399,21 +2399,21 @@ static void i40e_config_xps_tx_ring(struct i40e_ring *ring)
struct i40e_vsi *vsi = ring->vsi;
cpumask_var_t mask;
if (ring->q_vector && ring->netdev) {
if (!ring->q_vector || !ring->netdev)
return;
/* Single TC mode enable XPS */
if (vsi->tc_config.numtc <= 1 &&
!test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state)) {
if (vsi->tc_config.numtc <= 1) {
if (!test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state))
netif_set_xps_queue(ring->netdev,
&ring->q_vector->affinity_mask,
ring->queue_index);
} else if (alloc_cpumask_var(&mask, GFP_KERNEL)) {
/* Disable XPS to allow selection based on TC */
bitmap_zero(cpumask_bits(mask), nr_cpumask_bits);
netif_set_xps_queue(ring->netdev, mask,
ring->queue_index);
netif_set_xps_queue(ring->netdev, mask, ring->queue_index);
free_cpumask_var(mask);
}
}
}
/**
......
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