Re: relevant panic() when combining lagg(4), vlan(4) and bridge(4)

["Jean-Yves Migeon (NetBSD)" <jym%helkyn.org@localhost>]

Le 07/01/2025 à 20:47, Sverre Froyen a écrit :
> Hi Jean-Yves,
>
> It looks like bug #57650 is relevant here. I had the same panic and ended up using this configuration successfully
>
> # cat /etc/ifconfig.lagg0
> !ifconfig wm0 up
> !ifconfig wm1 up
> create
> laggproto lacp laggport wm0 laggport wm1
> 192.168.2.1 netmask 255.255.255.0
> mtu 1500
> up
>
> Regards,

So no luck here, the same panic() happens even with MTU set as shown in 
#57650.

I think there is a larger locking issue at play in lagg(4) that affects 
packet handling in untested paths; do you think it should be a separate 
PR or added to #57650?

Thanks,

===== DDB trace after change =====

Stopped in pid 0.3 (system) at netbsd:breakpoint+Ox5: leave
breakpoint() at netbsd:breakpoint+0x5
vpanic() at netbsd:vpanic+0x183
panic() at netbsd:panic+0x3c
lockdebug_abort() at netbsd:lockdebug_abort+0x114
mutex vector enter() at netbsd:mutex_vector_enter+Ox32b
bridge_input() at netbsd:bridge_input+0x946
vlan_input() at netbsd:vlan_input+0x143
ether_input() at netbsd:ether_input+Ox4c2
bridge_input() at netbsd:bridge_input+Oxa10
lagg_input_ethernet() at netbsd:lagg_input_ethernet+Ox2ab
if_percpuq_softint() at netbsd:if_percpuq_softint+0x8d
softint_dispatch() at netbsd:softint_dispatch+0x95
DDB lost frame for netbsd:Xsoftintr+0x4c, trying 0xffffb90939d9d0f0
Xsoftintr() at netbsd:Xsoftintr+0x4c

--
jym@