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From: Yongseok Koh <yskoh@mellanox.com>
To: "Xueming(Steven) Li" <xuemingl@mellanox.com>
Cc: Shahaf Shuler <shahafs@mellanox.com>, "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH] net/mlx5: fix memory region cache init
Date: Fri, 25 May 2018 10:19:43 +0000	[thread overview]
Message-ID: <249F1114-CFB6-41A1-9816-CD545514B553@mellanox.com> (raw)
In-Reply-To: <20180525063538.24363-1-xuemingl@mellanox.com>

> On May 24, 2018, at 11:35 PM, Xueming Li <xuemingl@mellanox.com> wrote:
> 
> This patch moved MR cache init from device configuration function to
> probe function to make sure init only once.
> 
> Fixes: 974f1e7ef146 ("net/mlx5: add new memory region support")
> Cc: yskoh@mellanox.com
> 
> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> ---
> drivers/net/mlx5/mlx5.c        | 11 +++++++++++
> drivers/net/mlx5/mlx5_ethdev.c | 11 -----------
> drivers/net/mlx5/mlx5_mr.c     |  1 +
> 3 files changed, 12 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
> index dae847493..77ed8e01f 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -1193,6 +1193,17 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
> 			goto port_error;
> 		}
> 		priv->config.max_verbs_prio = verb_priorities;
> +		/*
> +		 * Once the device is added to the list of memory event
> +		 * callback, its global MR cache table cannot be expanded
> +		 * on the fly because of deadlock. If it overflows, lookup
> +		 * should be done by searching MR list linearly, which is slow.
> +		 */
> +		err = -mlx5_mr_btree_init(&priv->mr.cache,
> +					  MLX5_MR_BTREE_CACHE_N * 2,
> +					  eth_dev->device->numa_node);
> +		if (err)
> +			goto port_error;

A nit.
Like mlx5_flow_create_drop_queue(), please store rte_errno to err (err = rte_errno;)
instead of putting a minus sign to the function.

With that being fixed, you can put my acked-by tag when you submit v2.
 
Thanks,
Yongseok

> 		/* Add device to memory callback list. */
> 		rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
> 		LIST_INSERT_HEAD(&mlx5_shared_data->mem_event_cb_list,
> diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
> index f6cebae41..90488af33 100644
> --- a/drivers/net/mlx5/mlx5_ethdev.c
> +++ b/drivers/net/mlx5/mlx5_ethdev.c
> @@ -392,17 +392,6 @@ mlx5_dev_configure(struct rte_eth_dev *dev)
> 		if (++j == rxqs_n)
> 			j = 0;
> 	}
> -	/*
> -	 * Once the device is added to the list of memory event callback, its
> -	 * global MR cache table cannot be expanded on the fly because of
> -	 * deadlock. If it overflows, lookup should be done by searching MR list
> -	 * linearly, which is slow.
> -	 */
> -	if (mlx5_mr_btree_init(&priv->mr.cache, MLX5_MR_BTREE_CACHE_N * 2,
> -			       dev->device->numa_node)) {
> -		/* rte_errno is already set. */
> -		return -rte_errno;
> -	}
> 	return 0;
> }
> 
> diff --git a/drivers/net/mlx5/mlx5_mr.c b/drivers/net/mlx5/mlx5_mr.c
> index abb1f5179..08105a443 100644
> --- a/drivers/net/mlx5/mlx5_mr.c
> +++ b/drivers/net/mlx5/mlx5_mr.c
> @@ -191,6 +191,7 @@ mlx5_mr_btree_init(struct mlx5_mr_btree *bt, int n, int socket)
> 		rte_errno = EINVAL;
> 		return -rte_errno;
> 	}
> +	assert(!bt->table && !bt->size);
> 	memset(bt, 0, sizeof(*bt));
> 	bt->table = rte_calloc_socket("B-tree table",
> 				      n, sizeof(struct mlx5_mr_cache),
> -- 
> 2.13.3
> 

  parent reply	other threads:[~2018-05-25 10:19 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-25  6:35 Xueming Li
2018-05-25  6:38 ` Xueming(Steven) Li
2018-05-25 10:19 ` Yongseok Koh [this message]
2018-05-25 13:18   ` Xueming(Steven) Li
2018-05-25 15:41     ` Yongseok Koh
2018-05-26  2:31       ` Xueming(Steven) Li
2018-05-26  5:01         ` Yongseok Koh
2018-05-26 13:27 ` [dpdk-dev] [PATCH v2] " Xueming Li
2018-05-26 17:08   ` Yongseok Koh
2018-05-27  5:05     ` Shahaf Shuler
2018-05-27  5:08       ` Shahaf Shuler

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