On Wed, Mar 31, 2021 at 2:05 AM Wong, Vee Khee wrote: > > Hi all, > > This patch introduced the following massive warnings printouts on a > Intel x86 Alderlake platform with STMMAC MAC and Marvell 88E2110 PHY. > > [ 149.674232] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 159.930310] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 170.186205] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 180.434311] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 190.682309] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 200.690176] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 210.938310] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 221.186311] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 231.442311] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 241.690186] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 251.698288] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 261.946311] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 272.194181] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 282.442311] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 292.690310] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 302.938313] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 313.186255] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 323.442329] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 333.698309] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 343.946310] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 354.202166] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 364.450190] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > [ 374.706314] unregister_netdevice: waiting for sit0 to become free. Usage count = 2 > > Is this an expected behavior? > Nope, I already have a fix, but it depends on a pending patch. https://patchwork.kernel.org/project/netdevbpf/patch/20210330064551.545964-1-eric.dumazet@gmail.com/ (I need the patch being merged to add a corresponding Fixes: tag) You can try the attached patch :