On 16.11.2016 15:09, Jiri Pirko wrote:
> From: Ido Schimmel <ido...@mellanox.com>
>
> Commit b90eb7549499 ("fib: introduce FIB notification infrastructure")
> introduced a new notification chain to notify listeners (f.e., switchdev
> drivers) about addition and deletion of routes.
>
> However, upon registration to the chain the FIB tables can already be
> populated, which means potential listeners will have an incomplete view
> of the tables.
>
> Solve that by adding an API to request a FIB dump. The dump itself it
> done using RCU in order not to starve consumers that need RTNL to make
> progress.
>
> Signed-off-by: Ido Schimmel <ido...@mellanox.com>
> Signed-off-by: Jiri Pirko <j...@mellanox.com>
Have you looked at potential inconsistencies resulting of RCU walking
the table and having concurrent inserts?
I don't see a way around doing a journal like in filesystems somehow,
but maybe the effects are not that severe and it is not a problem after all.
Bye,
Hannes
