Is there any progress on subj issue?
I see it was investigated here:
https://www.spinics.net/lists/netdev/msg361434.html
But it still exist on later kernels:
[ 37.320301] ip/1047 is trying to acquire lock:
[ 37.324764] (_xmit_ETHER/1){+.....}, at: [<c06ad228>] dev_mc_sync+0x4c/0x88
[ 37.331882]
[ 37.331882] but task is already holding lock:
[ 37.337738] (_xmit_ETHER/1){+.....}, at: [<c06ad228>] dev_mc_sync+0x4c/0x88
[ 37.344828]
[ 37.344828] other info that might help us debug this:
[ 37.351384] Possible unsafe locking scenario:
[ 37.351384]
[ 37.357326] CPU0
[ 37.359778] ----
[ 37.362230] lock(_xmit_ETHER/1);
[ 37.365650] lock(_xmit_ETHER/1);
[ 37.369069]
[ 37.369069] *** DEADLOCK ***
[ 37.369069]
[ 37.375013] May be due to missing lock nesting notation
[ 37.375013]
[ 37.381830] 3 locks held by ip/1047:
[ 37.385416] #0: (rtnl_mutex){+.+.+.}, at: [<c06b8248>]
rtnetlink_rcv+0x1c/0x38
[ 37.392860] #1: (&vlan_netdev_addr_lock_key/1){+.....}, at:
[<c06a4f94>] dev_set_rx_mode+0x1c/0x30
[ 37.402046] #2: (_xmit_ETHER/1){+.....}, at: [<c06ad228>]
dev_mc_sync+0x4c/0x88
[ 37.409574]
[ 37.409574] stack backtrace:
[ 37.413952] CPU: 0 PID: 1047 Comm: ip Not tainted
4.10.0maxdebug-00008-g9d55486 #22
[ 37.421639] Hardware name: Generic AM33XX (Flattened Device Tree)
[ 37.427756] Backtrace:
[ 37.430237] [<c010bf78>] (dump_backtrace) from [<c010c220>]
(show_stack+0x18/0x1c)
[ 37.437842] r7:c140f7ec r6:c13e29e0 r5:dc316780 r4:c0db8408
[ 37.443537] [<c010c208>] (show_stack) from [<c0402ab0>]
(dump_stack+0x20/0x28)
[ 37.450800] [<c0402a90>] (dump_stack) from [<c016b294>]
(__lock_acquire+0x15d4/0x18ec)
[ 37.458753] [<c0169cc0>] (__lock_acquire) from [<c016b958>]
(lock_acquire+0x74/0x94)
[ 37.466532] r10:dc2260c0 r9:dd747910 r8:00000000 r7:00000001
r6:00000001 r5:600d0013
[ 37.474393] r4:00000000
[ 37.476946] [<c016b8e4>] (lock_acquire) from [<c07f802c>]
(_raw_spin_lock_nested+0x44/0x54)
[ 37.485334] r7:00001002 r6:dd4fd988 r5:dc1f3000 r4:dd4fd988
[ 37.491022] [<c07f7fe8>] (_raw_spin_lock_nested) from [<c06ad228>]
(dev_mc_sync+0x4c/0x88)
[ 37.499320] r4:dd4fd800
[ 37.501870] [<c06ad1dc>] (dev_mc_sync) from [<c0796b60>]
(dsa_slave_set_rx_mode+0x28/0x38)
[ 37.510171] r7:00001002 r6:00000000 r5:dd4fd800 r4:dc1f3000
[ 37.515856] [<c0796b38>] (dsa_slave_set_rx_mode) from [<c06a4f40>]
(__dev_set_rx_mode+0x64/0x9c)
--
Best regards,
Maxim Uvarov
