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From: Andrew Rybchenko <arybchenko@solarflare.com>
To: Yongseok Koh <yskoh@mellanox.com>, <wenzhuo.lu@intel.com>,
	<jingjing.wu@intel.com>, <olivier.matz@6wind.com>
Cc: <dev@dpdk.org>, <konstantin.ananyev@intel.com>,
	<stephen@networkplumber.org>, <thomas@monjalon.net>,
	<adrien.mazarguil@6wind.com>, <nelio.laranjeiro@6wind.com>
Subject: Re: [dpdk-dev] [PATCH v7 1/2] mbuf: support attaching external buffer to mbuf
Date: Fri, 27 Apr 2018 10:22:31 +0300	[thread overview]
Message-ID: <5a7f368a-8b1b-705a-2186-be76c59720cf@solarflare.com> (raw)
In-Reply-To: <20180427000123.31888-1-yskoh@mellanox.com>

On 04/27/2018 03:01 AM, Yongseok Koh wrote:
> This patch introduces a new way of attaching an external buffer to a mbuf.
>
> Attaching an external buffer is quite similar to mbuf indirection in
> replacing buffer addresses and length of a mbuf, but a few differences:
>    - When an indirect mbuf is attached, refcnt of the direct mbuf would be
>      2 as long as the direct mbuf itself isn't freed after the attachment.
>      In such cases, the buffer area of a direct mbuf must be read-only. But
>      external buffer has its own refcnt and it starts from 1. Unless
>      multiple mbufs are attached to a mbuf having an external buffer, the
>      external buffer is writable.
>    - There's no need to allocate buffer from a mempool. Any buffer can be
>      attached with appropriate free callback.
>    - Smaller metadata is required to maintain shared data such as refcnt.
>
> Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
> Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Acked-by: Olivier Matz <olivier.matz@6wind.com>

Many thanks,
Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>

  parent reply	other threads:[~2018-04-27  7:22 UTC|newest]

Thread overview: 86+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-10  1:25 [dpdk-dev] [PATCH v1 0/6] net/mlx5: add Multi-Packet Rx support Yongseok Koh
2018-03-10  1:25 ` [dpdk-dev] [PATCH v1 1/6] mbuf: add buffer offset field for flexible indirection Yongseok Koh
2018-03-10  1:25 ` [dpdk-dev] [PATCH v1 2/6] net/mlx5: separate filling Rx flags Yongseok Koh
2018-03-10  1:25 ` [dpdk-dev] [PATCH v1 3/6] net/mlx5: add a function to rdma-core glue Yongseok Koh
2018-03-12  9:13   ` Nélio Laranjeiro
2018-03-10  1:25 ` [dpdk-dev] [PATCH v1 4/6] net/mlx5: add Multi-Packet Rx support Yongseok Koh
2018-03-12  9:20   ` Nélio Laranjeiro
2018-03-10  1:25 ` [dpdk-dev] [PATCH v1 5/6] net/mlx5: release Tx queue resource earlier than Rx Yongseok Koh
2018-03-10  1:25 ` [dpdk-dev] [PATCH v1 6/6] app/testpmd: conserve mbuf indirection flag Yongseok Koh
2018-04-02 18:50 ` [dpdk-dev] [PATCH v2 0/6] net/mlx5: add Multi-Packet Rx support Yongseok Koh
2018-04-02 18:50   ` [dpdk-dev] [PATCH v2 1/6] mbuf: add buffer offset field for flexible indirection Yongseok Koh
2018-04-03  8:26     ` Olivier Matz
2018-04-04  0:12       ` Yongseok Koh
2018-04-09 16:04         ` Olivier Matz
2018-04-10  1:59           ` Yongseok Koh
2018-04-11  0:25             ` Ananyev, Konstantin
2018-04-11  5:33               ` Yongseok Koh
2018-04-11 11:39                 ` Ananyev, Konstantin
2018-04-11 14:02                   ` Andrew Rybchenko
2018-04-11 17:18                     ` Yongseok Koh
2018-04-11 17:08                   ` Yongseok Koh
2018-04-12 16:34                     ` Ananyev, Konstantin
2018-04-12 18:58                       ` Yongseok Koh
2018-04-02 18:50   ` [dpdk-dev] [PATCH v2 2/6] net/mlx5: separate filling Rx flags Yongseok Koh
2018-04-02 18:50   ` [dpdk-dev] [PATCH v2 3/6] net/mlx5: add a function to rdma-core glue Yongseok Koh
2018-04-02 18:50   ` [dpdk-dev] [PATCH v2 4/6] net/mlx5: add Multi-Packet Rx support Yongseok Koh
2018-04-02 18:50   ` [dpdk-dev] [PATCH v2 5/6] net/mlx5: release Tx queue resource earlier than Rx Yongseok Koh
2018-04-02 18:50   ` [dpdk-dev] [PATCH v2 6/6] app/testpmd: conserve mbuf indirection flag Yongseok Koh
2018-04-19  1:11 ` [dpdk-dev] [PATCH v3 1/2] mbuf: support attaching external buffer to mbuf Yongseok Koh
2018-04-19  1:11   ` [dpdk-dev] [PATCH v3 2/2] app/testpmd: conserve offload flags of mbuf Yongseok Koh
2018-04-23 11:53   ` [dpdk-dev] [PATCH v3 1/2] mbuf: support attaching external buffer to mbuf Ananyev, Konstantin
2018-04-24  2:04     ` Yongseok Koh
2018-04-25 13:16       ` Ananyev, Konstantin
2018-04-25 16:44         ` Yongseok Koh
2018-04-25 18:05           ` Ananyev, Konstantin
2018-04-23 16:18   ` Olivier Matz
2018-04-24  1:29     ` Yongseok Koh
2018-04-24 15:36       ` Olivier Matz
2018-04-24  1:38 ` [dpdk-dev] [PATCH v4 " Yongseok Koh
2018-04-24  1:38   ` [dpdk-dev] [PATCH v4 2/2] app/testpmd: conserve offload flags of mbuf Yongseok Koh
2018-04-24  5:01   ` [dpdk-dev] [PATCH v4 1/2] mbuf: support attaching external buffer to mbuf Stephen Hemminger
2018-04-24 11:47     ` Yongseok Koh
2018-04-24 12:28   ` Andrew Rybchenko
2018-04-24 16:02     ` Olivier Matz
2018-04-24 18:21       ` [dpdk-dev] ***Spam*** " Andrew Rybchenko
2018-04-24 19:15         ` [dpdk-dev] " Olivier Matz
2018-04-24 20:22           ` Thomas Monjalon
2018-04-24 21:53             ` Yongseok Koh
2018-04-24 22:15               ` Thomas Monjalon
2018-04-25  8:21               ` Olivier Matz
2018-04-25 15:06             ` Stephen Hemminger
2018-04-24 23:34           ` Yongseok Koh
2018-04-25 14:45             ` Andrew Rybchenko
2018-04-25 17:40               ` Yongseok Koh
2018-04-25  8:28       ` Olivier Matz
2018-04-25  9:08         ` Yongseok Koh
2018-04-25  9:19           ` Yongseok Koh
2018-04-25 20:00             ` Olivier Matz
2018-04-25 22:54               ` Yongseok Koh
2018-04-24 22:30     ` Yongseok Koh
2018-04-25  2:53 ` [dpdk-dev] [PATCH v5 " Yongseok Koh
2018-04-25  2:53   ` [dpdk-dev] [PATCH v5 2/2] app/testpmd: conserve offload flags of mbuf Yongseok Koh
2018-04-25 13:31   ` [dpdk-dev] [PATCH v5 1/2] mbuf: support attaching external buffer to mbuf Ananyev, Konstantin
2018-04-25 17:06     ` Yongseok Koh
2018-04-25 17:23       ` Ananyev, Konstantin
2018-04-25 18:02         ` Yongseok Koh
2018-04-25 18:22           ` Yongseok Koh
2018-04-25 18:30             ` Yongseok Koh
2018-04-26  1:10 ` [dpdk-dev] [PATCH v6 " Yongseok Koh
2018-04-26  1:10   ` [dpdk-dev] [PATCH v6 2/2] app/testpmd: conserve offload flags of mbuf Yongseok Koh
2018-04-26 11:39   ` [dpdk-dev] [PATCH v6 1/2] mbuf: support attaching external buffer to mbuf Ananyev, Konstantin
2018-04-26 16:05   ` Andrew Rybchenko
2018-04-26 16:10     ` Thomas Monjalon
2018-04-26 19:42       ` Olivier Matz
2018-04-26 19:58         ` Thomas Monjalon
2018-04-26 20:07           ` Olivier Matz
2018-04-26 20:24             ` Thomas Monjalon
2018-04-26 17:18     ` Yongseok Koh
2018-04-26 19:45       ` Olivier Matz
2018-04-27  0:01 ` [dpdk-dev] [PATCH v7 " Yongseok Koh
2018-04-27  0:01   ` [dpdk-dev] [PATCH v7 2/2] app/testpmd: conserve offload flags of mbuf Yongseok Koh
2018-04-27  8:00     ` Andrew Rybchenko
2018-04-27  7:22   ` Andrew Rybchenko [this message]
2018-04-27 17:22 ` [dpdk-dev] [PATCH v8 1/2] mbuf: support attaching external buffer to mbuf Yongseok Koh
2018-04-27 17:22   ` [dpdk-dev] [PATCH v8 2/2] app/testpmd: conserve offload flags of mbuf Yongseok Koh
2018-04-27 18:09   ` [dpdk-dev] [PATCH v8 1/2] mbuf: support attaching external buffer to mbuf Thomas Monjalon

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