[vz7.83.x] net/drivers/i40e: suppress high order allocation warning

Submitted by Konstantin Khorenko on Dec. 19, 2018, 9:24 a.m.


Message ID 20181219092442.4611-1-khorenko@virtuozzo.com
State New
Series "net/drivers/i40e: suppress high order allocation warning"
Headers show

Commit Message

Konstantin Khorenko Dec. 19, 2018, 9:24 a.m.
If we use RDMA over Intel X722 NICs we get complains about 3rd order
allocation in i40e_setup_tx_descriptors().

  bi_size = sizeof(struct i40e_tx_buffer) * tx_ring->count;

sizeof(struct i40e_tx_buffer) == 40 bytes and
tx_ring->count can easily be I40E_DEFAULT_NUM_DESCRIPTORS == 512,
so total allocation size is 20480 bytes.

tx_ring is used for DMA, so we cannot switch to kvmalloc() here,
allocation happens on interface UP and on some parameters
change via ethtool, so it's not an often case,
so let's just suppress the warning here.


Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
 drivers/net/ethernet/intel/i40e/i40e_txrx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 4edb18c5a04c..70974759169c 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1322,7 +1322,7 @@  int i40e_setup_tx_descriptors(struct i40e_ring *tx_ring)
 	/* warn if we are about to overwrite the pointer */
 	bi_size = sizeof(struct i40e_tx_buffer) * tx_ring->count;
-	tx_ring->tx_bi = kzalloc(bi_size, GFP_KERNEL);
+	tx_ring->tx_bi = kzalloc(bi_size, GFP_KERNEL | __GFP_NOWARN);
 	if (!tx_ring->tx_bi)
 		goto err;