[PATCH net-next 0/6] Allow parallel devlink execution

[Leon Romanovsky <leon@kernel.org>]

From: Leon Romanovsky <leonro@nvidia.com>

Hi,

This is final piece of devlink locking puzzle, where I remove global
mutex lock (devlink_mutex), so we can run devlink commands in parallel.

The series starts with addition of port_list_lock, which is needed to
prevent locking dependency between netdevsim sysfs and devlink. It
follows by the patch that adds context aware locking primitives. Such
primitives allow us to make sure that devlink instance is locked and
stays locked even during reload operation. The last patches opens
devlink to parallel commands.

It tested on mlx5, mlx4, mlxsw, netdevsim + Ido's syzkaller.

BTW, in the future patches, we will clean devlink from over-engineered
APIs and implementations. It will open a venue to revise all the places
that hold devlink lock, if they really need to do it.

Thanks

[1] https://lore.kernel.org/netdev/cover.1636390483.git.leonro@nvidia.com/
[2] https://lore.kernel.org/netdev/9716f9a13e217a0a163b745b6e92e02d40973d2c.1635701665.git.leonro@nvidia.com/

Leon Romanovsky (6):
  devlink: Clean registration of devlink port
  devlink: Be explicit with devlink port protection
  devlink: Add devlink nested locking primitive
  devlink: Require devlink lock during device reload
  devlink: Use xarray locking mechanism instead big devlink lock
  devlink: Open devlink to parallel operations

 net/core/devlink.c | 432 ++++++++++++++++++++++++---------------------
 1 file changed, 232 insertions(+), 200 deletions(-)

-- 
2.33.1