diff options
| author | Tariq Toukan | 2022-08-02 14:47:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2024-01-01 12:38:55 +0000 |
| commit | 148ec770c63e5a338a5c7d2b27aaa1eb2bcb1c91 (patch) | |
| tree | a52dbb5daddfd8fbf23f5f551cf1ecd7de2a6f90 /include | |
| parent | bd6e091629103f1ceaedbd9d41f68e1c5b2731b9 (diff) | |
net/mlx5: Prevent high-rate FW commands from populating all slots
[ Upstream commit 63fbae0a74c3e1df7c20c81e04353ced050d9887 ]
Certain connection-based device-offload protocols (like TLS) use
per-connection HW objects to track the state, maintain the context, and
perform the offload properly. Some of these objects are created,
modified, and destroyed via FW commands. Under high connection rate,
this type of FW commands might continuously populate all slots of the FW
command interface and throttle it, while starving other critical control
FW commands.
Limit these throttle commands to using only up to a portion (half) of
the FW command interface slots. FW commands maximal rate is not hit, and
the same high rate is still reached when applying this limitation.
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Stable-dep-of: 8f5100da56b3 ("net/mlx5e: Fix a race in command alloc flow")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mlx5/driver.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mlx5/driver.h b/include/linux/mlx5/driver.h index 3660ce6a9349..ce019c337f67 100644 --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -308,6 +308,7 @@ struct mlx5_cmd { struct workqueue_struct *wq; struct semaphore sem; struct semaphore pages_sem; + struct semaphore throttle_sem; int mode; u16 allowed_opcode; struct mlx5_cmd_work_ent *ent_arr[MLX5_MAX_COMMANDS]; |