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net/mlx5: Do not hold group lock while allocating FTE in software

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FTE memory allocation using alloc_fte() doesn't have any dependency
on the flow group.
Hence, do not hold flow group lock while performing alloc_fte().
This helps to reduce contention of flow group lock.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Parav Pandit 2019-09-19 17:22:19 -05:00 committed by Saeed Mahameed
parent ae2741e2b6
commit 84c7af6375
1 changed files with 10 additions and 9 deletions
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19
drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
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@ -1814,6 +1814,13 @@ _mlx5_add_flow_rules(struct mlx5_flow_table *ft,
return rule;
}
fte = alloc_fte(ft, spec, flow_act);
if (IS_ERR(fte)) {
up_write_ref_node(&ft->node, false);
err = PTR_ERR(fte);
goto err_alloc_fte;
}
nested_down_write_ref_node(&g->node, FS_LOCK_PARENT);
up_write_ref_node(&ft->node, false);
@ -1821,17 +1828,9 @@ _mlx5_add_flow_rules(struct mlx5_flow_table *ft,
if (err)
goto err_release_fg;
fte = alloc_fte(ft, spec, flow_act);
if (IS_ERR(fte)) {
err = PTR_ERR(fte);
goto err_release_fg;
}
err = insert_fte(g, fte);
if (err) {
kmem_cache_free(steering->ftes_cache, fte);
if (err)
goto err_release_fg;
}
nested_down_write_ref_node(&fte->node, FS_LOCK_CHILD);
up_write_ref_node(&g->node, false);
@ -1843,6 +1842,8 @@ _mlx5_add_flow_rules(struct mlx5_flow_table *ft,
err_release_fg:
up_write_ref_node(&g->node, false);
kmem_cache_free(steering->ftes_cache, fte);
err_alloc_fte:
tree_put_node(&g->node, false);
return ERR_PTR(err);
}