Hello.
On 3/10/2016 3:15 PM, Jesper Dangaard Brouer wrote:
Bulk free of SKBs happen transparently by the API call napi_consume_skb().
The napi budget parameter is usually needed by napi_consume_skb()
to detect if called from netpoll. In this patch it have an extra meaning.
It has.
For mlx4 driver, the mlx4_en_stop_port() call is done outside
NAPI/softirq context, and cleanup the entire TX ring via
mlx4_en_free_tx_buf(). The code mlx4_en_free_tx_desc() for
freeing SKBs are shared with NAPI calls.
To handle this shared use the zero budget indication is reused,
and handled appropiately in napi_consume_skb(). To reflect this,
Appropriately.
variable is called napi_mode for the function call that needed
this distinction.
Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com>
---
drivers/net/ethernet/mellanox/mlx4/en_tx.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
index e0946ab22010..1b41feafce9e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
[...]
@@ -371,7 +373,9 @@ int mlx4_en_free_tx_buf(struct net_device *dev, struct
mlx4_en_tx_ring *ring)
while (ring->cons != ring->prod) {
ring->last_nr_txbb = mlx4_en_free_tx_desc(priv, ring,
ring->cons & ring->size_mask,
- !!(ring->cons & ring->size), 0);
+ !!(ring->cons & ring->size), 0,
+ 0 /* none-NAPI caller */
Non-NAPI, perhaps?
[...]
MBR, Sergei
