[Devel] [PATCH RH8 01/11] net/drivers/i40e: suppress high order allocation warning

[Andrey Zhadchenko]

From: Konstantin Khorenko <khorenko at virtuozzo.com>

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.

https://pmc.acronis.com/browse/VSTOR-18622

Signed-off-by: Konstantin Khorenko <khorenko at virtuozzo.com>

++++++++++++

net/drivers/i40e: suppress high order allocation warning - addon

Fixes: 483f8f01c553 ("net/drivers/i40e: suppress high order allocation
warning")

Signed-off-by: Konstantin Khorenko <khorenko at virtuozzo.com>

Merged two patches together during rebase to vz8
 - 483f8f01c553 ("net/drivers/i40e: suppress high order allocation warning")
 - 3dec55f2ccf6 ("net/drivers/i40e: suppress high order allocation warning - addon")

Signed-off-by: Andrey Zhadchenko <andrey.zhadchenko at virtuozzo.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index b849603..1c56ec2 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -1304,7 +1304,7 @@ int i40e_setup_tx_descriptors(struct i40e_ring *tx_ring)
 	/* warn if we are about to overwrite the pointer */
 	WARN_ON(tx_ring->tx_bi);
 	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_ORDER_NOWARN);
 	if (!tx_ring->tx_bi)
 		goto err;
 
-- 
1.8.3.1