netdev - Re: [RFC net-next 00/10] devlink: remove the wait-for-references on unregister

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Date:   Mon, 19 Dec 2022 09:38:09 -0800
From:   Jacob Keller <jacob.e.keller@...el.com>
To:     Jakub Kicinski <kuba@...nel.org>, <jiri@...nulli.us>,
        <leon@...nel.org>
CC:     <netdev@...r.kernel.org>
Subject: Re: [RFC net-next 00/10] devlink: remove the wait-for-references on
 unregister



On 12/16/2022 5:19 PM, Jakub Kicinski wrote:
> This set is on top of the previous RFC.
> 
> Move the registration and unregistration of the devlink instances
> under their instance locks. Don't perform the netdev-style wait
> for all references when unregistering the instance.
> 

Could you explain the reasoning/benefits here? I'm sure some of this is
explained in each commit message as well but it would help to understand
the overall series.

> Jakub Kicinski (10):
>   devlink: bump the instance index directly when iterating
>   devlink: update the code in netns move to latest helpers
>   devlink: protect devlink->dev by the instance lock
>   devlink: always check if the devlink instance is registered
>   devlink: remove the registration guarantee of references
>   devlink: don't require setting features before registration
>   netdevsim: rename a label
>   netdevsim: move devlink registration under the instance lock
>   devlink: allow registering parameters after the instance
>   netdevsim: register devlink instance before sub-objects
> 
>  drivers/net/netdevsim/dev.c |  15 +++--
>  include/net/devlink.h       |   3 +
>  net/devlink/basic.c         |  64 ++++++++++++------
>  net/devlink/core.c          | 127 +++++++++++++++++-------------------
>  net/devlink/devl_internal.h |  20 ++----
>  net/devlink/netlink.c       |  19 ++++--
>  6 files changed, 136 insertions(+), 112 deletions(-)
>