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From: Moshe Shemesh <moshe@nvidia.com>
To: Jakub Kicinski <kuba@kernel.org>, Moshe Shemesh <moshe@mellanox.com>
Cc: "David S. Miller" <davem@davemloft.net>,
	Jiri Pirko <jiri@mellanox.com>, <netdev@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH net-next RFC v2 01/13] devlink: Add reload action option to devlink reload command
Date: Tue, 18 Aug 2020 12:06:13 +0300	[thread overview]
Message-ID: <9fbad1d6-7052-225a-7d62-9d29548d6342@nvidia.com> (raw)
In-Reply-To: <20200817091615.37e76ca3@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>


On 8/17/2020 7:16 PM, Jakub Kicinski wrote:
>
> On Mon, 17 Aug 2020 12:37:40 +0300 Moshe Shemesh wrote:
>> Add devlink reload action to allow the user to request a specific reload
>> action. The action parameter is optional, if not specified then devlink
>> driver re-init action is used (backward compatible).
>> Note that when required to do firmware activation some drivers may need
>> to reload the driver. On the other hand some drivers may need to reset
>> the firmware to reinitialize the driver entities.
> See, this is why I wanted to keep --live as a separate option.
> Normally the driver is okay to satisfy more actions than requested,
> e.g. activate FW even if only driver_reinit was requested.
>
> fw_live_patch does not have this semantics, it explicitly requires
> driver to not impact connectivity much. No "can do more resets than
> requested" here. Hence the --live part would be better off as a
> separate argument (at least in uAPI, the in-kernel interface we can
> change later if needed).


Yes, it does have a different semantics, kind of no reset allowed.

On the other hand, it is not related to driver_reinit, only fw_activate.

So the uAPI should be:

     devlink dev reload DEV [ netns { PID | NAME | ID } ] [ action { 
driver_reinit | fw_activate [--live] } ]

Or maybe better than "live" say explicitly "no reset":

     devlink dev reload DEV [ netns { PID | NAME | ID } ] [ action { 
driver_reinit | fw_activate [--no_reset] } ]


>> Reload actions supported are:
>> driver_reinit: driver entities re-initialization, applying devlink-param
>>                 and devlink-resource values.
>> fw_activate: firmware activate.
>> fw_live_patch: firmware live patching.

  reply	other threads:[~2020-08-18  9:06 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-17  9:37 [PATCH net-next RFC v2 00/13] Add devlink reload action option Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 01/13] devlink: Add reload action option to devlink reload command Moshe Shemesh
2020-08-17 16:16   ` Jakub Kicinski
2020-08-18  9:06     ` Moshe Shemesh [this message]
2020-08-18 15:37       ` Jakub Kicinski
2020-08-17 16:36   ` Jiri Pirko
2020-08-18  9:10     ` Moshe Shemesh
2020-08-19  0:10       ` Jakub Kicinski
2020-08-19 12:18         ` Moshe Shemesh
2020-08-19 12:46           ` Jiri Pirko
2020-08-19 14:23             ` Moshe Shemesh
2020-08-19 15:18               ` Jiri Pirko
2020-08-19 16:25                 ` Jakub Kicinski
2020-08-19 18:55                   ` Jiri Pirko
2020-08-17  9:37 ` [PATCH net-next RFC v2 02/13] devlink: Add supported reload actions to dev get Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 03/13] net/mlx5: Add functions to set/query MFRL register Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 04/13] net/mlx5: Set cap for pci sync for fw update event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 05/13] net/mlx5: Handle sync reset request event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 06/13] net/mlx5: Handle sync reset now event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 07/13] net/mlx5: Handle sync reset abort event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 08/13] net/mlx5: Add support for devlink reload action fw activate Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 09/13] devlink: Add enable_remote_dev_reset generic parameter Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 10/13] net/mlx5: Add devlink param enable_remote_dev_reset support Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 11/13] net/mlx5: Add support for fw live patch event Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 12/13] net/mlx5: Add support for devlink reload action live patch Moshe Shemesh
2020-08-17  9:37 ` [PATCH net-next RFC v2 13/13] devlink: Add Documentation/networking/devlink/devlink-reload.rst Moshe Shemesh
2020-08-17 16:39   ` Jiri Pirko
2020-08-18  9:14     ` Moshe Shemesh
2020-08-18 11:07       ` Jiri Pirko
2020-08-18 20:04         ` Moshe Shemesh

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