netdev - Re: [PATCH net-next 0/7] mlxsw: Avoid non-tracker helpers when holding and putting netdevices

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Date: Fri, 28 Jul 2023 20:50:25 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Petr Machata <petrm@...dia.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, netdev@...r.kernel.org, idosch@...dia.com,
 mlxsw@...dia.com
Subject: Re: [PATCH net-next 0/7] mlxsw: Avoid non-tracker helpers when holding
 and putting netdevices

Hello:

This series was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Thu, 27 Jul 2023 17:59:18 +0200 you wrote:
> Using the tracking helpers, netdev_hold() and netdev_put(), makes it easier
> to debug netdevice refcount imbalances when CONFIG_NET_DEV_REFCNT_TRACKER
> is enabled. For example, the following traceback shows the callpath to the
> point of an outstanding hold that was never put:
> 
>     unregister_netdevice: waiting for swp3 to become free. Usage count = 6
>     ref_tracker: eth%d@...f888123c9a580 has 1/5 users at
> 	mlxsw_sp_switchdev_event+0x6bd/0xcc0 [mlxsw_spectrum]
> 	notifier_call_chain+0xbf/0x3b0
> 	atomic_notifier_call_chain+0x78/0x200
> 	br_switchdev_fdb_notify+0x25f/0x2c0 [bridge]
> 	fdb_notify+0x16a/0x1a0 [bridge]
> 	[...]
> 
> [...]

Here is the summary with links:
  - [net-next,1/7] mlxsw: spectrum: Drop unused functions mlxsw_sp_port_lower_dev_hold/_put()
    https://git.kernel.org/netdev/net-next/c/569f98b36b38
  - [net-next,2/7] mlxsw: spectrum_nve: Do not take reference when looking up netdevice
    https://git.kernel.org/netdev/net-next/c/16f8c846cd6f
  - [net-next,3/7] mlxsw: spectrum_switchdev: Use tracker helpers to hold & put netdevices
    https://git.kernel.org/netdev/net-next/c/1ae489ab43e0
  - [net-next,4/7] mlxsw: spectrum_router: FIB: Use tracker helpers to hold & put netdevices
    https://git.kernel.org/netdev/net-next/c/deeaa3716f4f
  - [net-next,5/7] mlxsw: spectrum_router: hw_stats: Use tracker helpers to hold & put netdevices
    https://git.kernel.org/netdev/net-next/c/b17b2d57b7c1
  - [net-next,6/7] mlxsw: spectrum_router: RIF: Use tracker helpers to hold & put netdevices
    https://git.kernel.org/netdev/net-next/c/d0e0e880122f
  - [net-next,7/7] mlxsw: spectrum_router: IPv6 events: Use tracker helpers to hold & put netdevices
    https://git.kernel.org/netdev/net-next/c/cb2116204169

You are awesome, thank you!
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