> This means, as far as I understand, 2 things: > 1. call_netdevice_notifiers_info doesn't help, since our problem is the > same > 2. I think that holding the RTNL should also be a valid way to iterate > through the net devices in the current netns, and doing just that > could be the simplest way out. It certainly worked when I tried it. > But those could also be famous last words... DSA makes the assumption it can block in a notifier change event. For example, NETDEV_CHANGEUPPER calls dsa_slave_changeupper() which calls into the driver. We have not seen any warnings about sleeping while atomic. So maybe see how NETDEV_CHANGEUPPER is issued. Andrew
