Re: [PATCH v4 net-next 08/13] mlx4: add page recycling in receive path

On 08/03/2017 6:17 PM, Eric Dumazet wrote:

Same technique than some Intel drivers, for arches where PAGE_SIZE = 4096

In most cases, pages are reused because they were consumed
before we could loop around the RX ring.

This brings back performance, and is even better,
a single TCP flow reaches 30Gbit on my hosts.

v2: added full memset() in mlx4_en_free_frag(), as Tariq found it was needed
if we switch to large MTU, as priv->log_rx_info can dynamically be changed.

Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 drivers/net/ethernet/mellanox/mlx4/en_rx.c   | 258 +++++++++------------------
 drivers/net/ethernet/mellanox/mlx4/mlx4_en.h |   1 -
 2 files changed, 82 insertions(+), 177 deletions(-)

Acked-by: Tariq Toukan <redacted>

Thanks.