Re: [PATCH net-next] openvswitch: enable ops lock for internal ports

[Jakub Kicinski <kuba@kernel.org>]

On Wed, 12 Aug 2026 20:30:03 +0800 Wang Zhan wrote:
> Open vSwitch internal ports currently use RTNL as their ops compatibility
> lock. Opt them in to netdev instance locking so eligible control operations
> can be serialized per device instead of contending on the global RTNL lock.
> 
> The internal port ethtool operations implement get_drvinfo and get_link.
> The latter uses ethtool_op_get_link(), which synchronizes linkwatch state
> and requires RTNL. Allow get_drvinfo to run under the instance lock, but
> set ETHTOOL_OP_NEEDS_RTNL_GLINK to retain RTNL for get_link.
> 
> Feature synchronization can acquire a lower device's ops lock while holding
> an internal port's lock. Assign these software upper devices a distinct
> lockdep class to describe the nesting.

Why are you sending this patch? Do you have an actual real life need
for unlocked get_drvinfo??