Known LoR when taking bringing up bge(4) after system in multiuser?

[Sergey Kandaurov]

On 20 February 2010 03:25, Garrett Cooper <yanefbsd at gmail.com> wrote:
> Hi,
>    I came across the following LoR:
>
> lock order reversal:
>  1st 0xc56aae04 if_afdata (if_afdata) @
> /usr/home/garrcoop/ipcvs/freebsd/src/sys/net/if_llatbl.c:130
>  2nd 0xc58a1d80 radix node head (radix node head) @
> /usr/home/garrcoop/ipcvs/freebsd/src/sys/net/route.c:360
> KDB: stack backtrace:
> db_trace_self_wrapper(c0c6993e,c5264828,c08b173f,c08a2f35,c0c6c9d1,...)
> at db_trace_self_wrapper+0x26
> kdb_backtrace(c08a2f35,c0c6c9d1,c5530758,c552b680,c5264884,...) at
> kdb_backtrace+0x29
> _witness_debugger(c0c6c9d1,c58a1d80,c0c6cacb,c552b680,c0c77940,...) at
> _witness_debugger+0x1e
> witness_checkorder(c58a1d80,1,c0c77940,168,0,...) at witness_checkorder+0x818
> _rw_rlock(c58a1d80,c0c77940,168,c568d2e4,1,...) at _rw_rlock+0x9c
> rtalloc1_fib(c5264a60,0,0,0,c526493c,...) at rtalloc1_fib+0x82
> rtalloc1(c5264a60,0,0,1,0,...) at rtalloc1+0x27
> in_lltable_rtcheck(c56aac00,a000,c5264a60,576,c0c7691c,...) at
> in_lltable_rtcheck+0x3e
> in_lltable_lookup(c58a1b00,a000,c5264a60,c0913e33,52098000,...) at
> in_lltable_lookup+0xc3
> llentry_update(c52649f0,c58a1b00,c5264a60,c56aac00,c552c4b8,...) at
> llentry_update+0xa3
> flowtable_lookup(c5739400,c5b27700,c5264a58,0,3,...) at flowtable_lookup+0x437
> ip_output(c5b27700,0,0,0,0,...) at ip_output+0xf8
> icmp_reflect(1,10,0,c552c6c0,c552bf70,...) at icmp_reflect+0x5cc
> icmp_input(c5b27700,14,c568d240,c0dafc80,c568d240,...) at icmp_input+0x3f0
> ip_input(c5b27700,c5264bcc,c07235f4,c0dafc80,0,...) at ip_input+0x619
> netisr_dispatch_src(1,0,c5b27700,c5264c04,c091c349,...) at
> netisr_dispatch_src+0xcb
> netisr_dispatch(1,c5b27700,c56aac00,c56aac00,c5b74002,...) at
> netisr_dispatch+0x20
> ether_demux(c56aac00,c5b27700,3,0,3) at ether_demux+0x193
> ether_input(c56aac00,c5b27700,c0c250e6,d41,c56b7008,...) at ether_input+0x355
> bge_rxeof(c56b7008,0,c0c250e6,e13,c56b7008,...) at bge_rxeof+0x2b9
> bge_intr(c56b7000,c5264cc8,c085f65d,c0dc8880,c5576a38,...) at bge_intr+0x107
> intr_event_execute_handlers(c55717f8,c5576a00,c0c61560,533,c5576a70,...)
> at intr_event_execute_handlers+0x10f
> ithread_loop(c56b26c0,c5264d38,c0c612a1,343,c55717f8,...) at ithread_loop+0x98
> fork_exit(c084923c,c56b26c0,c5264d38) at fork_exit+0xb8
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0, eip = 0, esp = 0xc5264d70, ebp = 0 ---
>
>    when I did the following steps [once]:
>
> echo "ifconfig_bge0=\"DHCP\"" >> /etc/rc.conf
> /etc/rc.d/netif start
>
>    using srcs from cvs pulled in the last 2 days or so...
>    I'll gladly provide more details when requested.

I faced a similar LOR when running ping.
Looks like it's not bge related, but comes from arpv2 and/or flowtable.

# ping 8.8.8.8
loPING 8.8.8.8 (8.ck8.8.8): 56 data  obytes
rder reversal:
 1st 0xfffffe00184413c0 if_afdata (if_afdata) @ /usr/src/sys/net/if_llatbl.c:151
 2nd 0xfffffe0018ee32f8 radix node head (radix node head) @
/usr/src/sys/net/route.c:362
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
kdb_backtrace() at kdb_backtrace+0x37
_witness_debugger() at _witness_debugger+0x2e
witness_checkorder() at witness_checkorder+0x807
_rw_rlock() at _rw_rlock+0x6d
rtalloc1_fib() at rtalloc1_fib+0x10b
in_lltable_rtcheck() at in_lltable_rtcheck+0x35
in_lltable_lookup() at in_lltable_lookup+0xbb
llentry_update() at llentry_update+0x19e
flowtable_lookup() at flowtable_lookup+0x6f6
flowtable_lookup_mbuf() at flowtable_lookup_mbuf+0x3c6
ip_output() at ip_output+0xa9c
rip_output() at rip_output+0x246
sosend_generic() at sosend_generic+0x347
kern_sendit() at kern_sendit+0x1b5
sendit() at sendit+0xdc
sendto() at sendto+0x4d
syscallenter() at syscallenter+0x1aa
syscall() at syscall+0x4c
Xfast_syscall() at Xfast_syscall+0xe2
--- syscall (133, FreeBSD ELF64, sendto), rip = 0x80095334c, rsp =
0x7ffffffed608, rbp = 0x40 ---
64 bytes from 8.8.8.8: icmp_seq=0 ttl=56 time=1332.205 ms
64 bytes from 8.8.8.8: icmp_seq=0 ttl=56 time=1332.274 ms (DUP!)