On Thu, 16 Jan 2025 02:33:06 +0000 Pavel Begunkov wrote: > On 1/16/25 01:06, Jakub Kicinski wrote: > > On Wed, 8 Jan 2025 14:06:35 -0800 David Wei wrote: > >> From: Pavel Begunkov <asml.silence@xxxxxxxxx> > >> > >> Zerocopy receive needs a net device to bind to its rx queue and dma map > >> buffers. As a preparation to following patches, resolve a net device > >> from the if_idx parameter with no functional changes otherwise. > > > > How do you know if someone unregisters this netdevice? > > The unregister process waits for all the refs to be released, > > for *ekhm* historic reasons. Normally ref holders subscribe > > to netdev events and kill their dependent objects. Perhaps > > it is somewhere else/later in the series... > > Ok, I can pin the struct device long term instead and kill > netdev in the uninstall callback off > unregister_netdevice_many_notify(), if that works with you. I think that would work. You mean the "underlying" device, right, netdev->dev.parent ? Like page_pool itself does. SG.
