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From: Jakub Kicinski <kuba@kernel.org>
To: Mina Almasry <almasrymina@google.com>
Cc: Pavel Begunkov <asml.silence@gmail.com>,
	netdev@vger.kernel.org, io-uring@vger.kernel.org,
	Eric Dumazet <edumazet@google.com>,
	Willem de Bruijn <willemb@google.com>,
	Paolo Abeni <pabeni@redhat.com>,
	andrew+netdev@lunn.ch, horms@kernel.org, davem@davemloft.net,
	sdf@fomichev.me, dw@davidwei.uk, michael.chan@broadcom.com,
	dtatulea@nvidia.com, ap420073@gmail.com
Subject: Re: [RFC v1 15/22] eth: bnxt: store the rx buf size per queue
Date: Fri, 1 Aug 2025 16:20:10 -0700	[thread overview]
Message-ID: <20250801162010.1f5b3fba@kernel.org> (raw)
In-Reply-To: <CAHS8izPZE752dfZVD6OzGJ7z_tmh2n2tvJK_0yd5mP51FCSKmw@mail.gmail.com>

On Mon, 28 Jul 2025 15:33:55 -0700 Mina Almasry wrote:
> > From: Jakub Kicinski <kuba@kernel.org>
> >
> > In normal operation only a subset of queues is configured for
> > zero-copy. Since zero-copy is the main use for larger buffer
> > sizes we need to configure the sizes per queue.
> >
> > Signed-off-by: Jakub Kicinski <kuba@kernel.org>
> > Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>  
> 
> I wonder if this is necessary for some reason, or is it better to
> expect the driver to refer to the netdev->qcfgs directly?
> 
> By my count the configs can now live in 4 places: the core netdev
> config, the core per-queue config, the driver netdev config, and the
> driver per-queue config.
> 
> I honestly I'm not sure about duplicating settings between the netdev
> configs and the per-queue configs in the first place (seems like
> configs should be either driver wide or per-queue to me, and not
> both), and I'm less sure about again duplicating the settings between
> core structs and in-driver structs. Seems like the same information
> duplicated in many places and a nightmare to keep it all in sync.

Does patch 20 answer this question?

  reply	other threads:[~2025-08-01 23:20 UTC|newest]

Thread overview: 66+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-28 11:04 [RFC v1 00/22] Large rx buffer support for zcrx Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 01/22] docs: ethtool: document that rx_buf_len must control payload lengths Pavel Begunkov
2025-07-28 18:11   ` Mina Almasry
2025-07-28 21:36   ` Mina Almasry
2025-08-01 23:13     ` Jakub Kicinski
2025-07-28 11:04 ` [RFC v1 02/22] net: ethtool: report max value for rx-buf-len Pavel Begunkov
2025-07-29  5:00   ` Subbaraya Sundeep
2025-07-28 11:04 ` [RFC v1 03/22] net: use zero value to restore rx_buf_len to default Pavel Begunkov
2025-07-29  5:03   ` Subbaraya Sundeep
2025-07-28 11:04 ` [RFC v1 04/22] net: clarify the meaning of netdev_config members Pavel Begunkov
2025-07-28 21:44   ` Mina Almasry
2025-08-01 23:14     ` Jakub Kicinski
2025-07-28 11:04 ` [RFC v1 05/22] net: add rx_buf_len to netdev config Pavel Begunkov
2025-07-28 21:50   ` Mina Almasry
2025-08-01 23:18     ` Jakub Kicinski
2025-07-28 11:04 ` [RFC v1 06/22] eth: bnxt: read the page size from the adapter struct Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 07/22] eth: bnxt: set page pool page order based on rx_page_size Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 08/22] eth: bnxt: support setting size of agg buffers via ethtool Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 09/22] net: move netdev_config manipulation to dedicated helpers Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 10/22] net: reduce indent of struct netdev_queue_mgmt_ops members Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 11/22] net: allocate per-queue config structs and pass them thru the queue API Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 12/22] net: pass extack to netdev_rx_queue_restart() Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 13/22] net: add queue config validation callback Pavel Begunkov
2025-07-28 22:26   ` Mina Almasry
2025-07-28 11:04 ` [RFC v1 14/22] eth: bnxt: always set the queue mgmt ops Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 15/22] eth: bnxt: store the rx buf size per queue Pavel Begunkov
2025-07-28 22:33   ` Mina Almasry
2025-08-01 23:20     ` Jakub Kicinski [this message]
2025-07-28 11:04 ` [RFC v1 16/22] eth: bnxt: adjust the fill level of agg queues with larger buffers Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 17/22] netdev: add support for setting rx-buf-len per queue Pavel Begunkov
2025-07-28 23:10   ` Mina Almasry
2025-08-01 23:37     ` Jakub Kicinski
2025-07-28 11:04 ` [RFC v1 18/22] net: wipe the setting of deactived queues Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 19/22] eth: bnxt: use queue op config validate Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 20/22] eth: bnxt: support per queue configuration of rx-buf-len Pavel Begunkov
2025-07-28 11:04 ` [RFC v1 21/22] net: parametrise mp open with a queue config Pavel Begunkov
2025-08-02  0:10   ` Jakub Kicinski
2025-08-04 12:50     ` Pavel Begunkov
2025-08-05 22:43       ` Jakub Kicinski
2025-08-06  0:05       ` Jakub Kicinski
2025-08-06 16:48       ` Mina Almasry
2025-08-06 18:11         ` Jakub Kicinski
2025-08-06 18:30           ` Mina Almasry
2025-08-06 22:05             ` Jakub Kicinski
2025-07-28 11:04 ` [RFC v1 22/22] io_uring/zcrx: implement large rx buffer support Pavel Begunkov
2025-07-28 17:13 ` [RFC v1 00/22] Large rx buffer support for zcrx Stanislav Fomichev
2025-07-28 18:18   ` Pavel Begunkov
2025-07-28 20:21     ` Stanislav Fomichev
2025-07-28 21:28       ` Pavel Begunkov
2025-07-28 22:06         ` Stanislav Fomichev
2025-07-28 22:44           ` Pavel Begunkov
2025-07-29 16:33             ` Stanislav Fomichev
2025-07-30 14:16               ` Pavel Begunkov
2025-07-30 15:50                 ` Stanislav Fomichev
2025-07-31 19:34                   ` Mina Almasry
2025-07-31 19:57                     ` Pavel Begunkov
2025-07-31 20:05                       ` Mina Almasry
2025-08-01  9:48                         ` Pavel Begunkov
2025-08-01  9:58                     ` Pavel Begunkov
2025-07-28 23:22           ` Mina Almasry
2025-07-29 16:41             ` Stanislav Fomichev
2025-07-29 17:01               ` Mina Almasry
2025-07-28 18:54 ` Mina Almasry
2025-07-28 19:42   ` Pavel Begunkov
2025-07-28 20:23     ` Mina Almasry
2025-07-28 20:57       ` Pavel Begunkov

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