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author | Eran Ben Elisha <eranbe@mellanox.com> | 2017-12-19 14:52:29 +0200 |
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committer | Saeed Mahameed <saeedm@mellanox.com> | 2018-01-19 22:41:33 +0200 |
commit | 7ca560b5af70b5f578c9bf32c8fbfbd68d22252f (patch) | |
tree | 1ea15c68151f7fc60fd605c929d55084541dedbc /drivers/net/ethernet/mellanox/mlx5/core/en_stats.c | |
parent | net/mlx5e: Add Event Queue meta data info for TX timeout logs (diff) | |
download | linux-dev-7ca560b5af70b5f578c9bf32c8fbfbd68d22252f.tar.xz linux-dev-7ca560b5af70b5f578c9bf32c8fbfbd68d22252f.zip |
net/mlx5e: Poll event queue upon TX timeout before performing full channels recovery
Up until this patch, on every TX timeout we would try to do channels
recovery. However, in case of a lost interrupt for an EQ, the channel
associated to it cannot be recovered if reopened as it would never get
another interrupt on sent/received traffic, and eventually ends up with
another TX timeout (Restarting the EQ is not part of channel recovery).
This patch adds a mechanism for explicitly polling EQ in case of a TX
timeout in order to recover from a lost interrupt. If this is not the
case (no pending EQEs), perform a channels full recovery as usual.
Once a lost EQE is recovered, it triggers the NAPI to run and handle all
pending completions. This will free some budget in the bql (via calling
netdev_tx_completed_queue) or by clearing pending TXWQEs and waking up
the queue. One of the above actions will move the queue to be ready for
transmit again.
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_stats.c')
0 files changed, 0 insertions, 0 deletions