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Ok - here we go. You can thank my lovely wife, Jeannine, for reading 
this back to me so I could write it down :)



cpu_debugger(1,0,266354,61c47a0,11f492) + 6
panic(218512,61c48cc,61c48cc,1,11f374) + f8
_lockmgr(266354,1,0,2220aa,93) + 118
uvmfault_lookup(61c48cc,0) + 20a
uvm_fault(266354,115a000,0,1) + 52
trap(8,402074d,115a000) + 328
oc_cksum(?)
in_cksum(1157200,106,1157258,1157244,1157258) + 6c
fr_cksum(1157200,1157244,6,1157258,61c4b6c) + 64
appr_check(61c4b6c,1159600) + b2
fr_natin(61c4b6c,1159600,1,1) + 144
fr_checknatin(61c4b6c,61c4b68) + c0
fr_check(1157244,14,101b040,0,61c4c58) + 448
fr_check_wrapper(0,61c4c58,101b040,1) + 56
pfil_run_hooks(280afc,61c4cac,101b040,1,61c4c9c,1157254,4) + 4e
ip_input(1157200) + 15a
ipintr(0,61c4d2c,1f0ce2,0,47) + 58
netintr(0,47,47,0,1ed1c2) + 98
trap(9,0,0) + 678
rei(?)
mi_switch(816600,0,42672000,44,0) + 98
ltsleep(293dcc,118,22f3ac,12e,0) + 346
sys_select(816600,61c4f44,6134f3c) + 174
syscall_plain(5d,816600,61c4fb4,ffffffff,2) + 82
syscall(5d) + 4e
trap0() + e


Thanks,

Louis








Christos Zoulas wrote:
> On Apr 20,  1:13am, lguillaume@berklee.edu ("Louis  Guillaume") wrote:
> -- Subject: Re: `panic: lockmgr: no context' on 2.0.2 with network load
> 
> Can you take them down by hand? just which files/lines it finds the
> inconsistency? Yes, it is pretty serious.
> 
> christos
> 
> | Christos Zoulas wrote:
> | > On Apr 18,  1:38am, lguillaume@berklee.edu ("Louis  Guillaume") wrote:
> | > -- Subject: Re: `panic: lockmgr: no context' on 2.0.2 with network load
> | > 
> | > | Ok - Do I just compile a kernel with "options LOCKDEBUG"? I don't see 
> | > | any references to this in the GENERIC kernel.
> | > 
> | > Yes, that would do it.
> | > 
> | > | Also - Is there a way to get the backtrace from ddb (at panic-time) into 
> | > | a file somewhere?
> | > 
> | > t /l should work.
> | > 
> | > | On reboot, savecore just says "savecore: no core dump (invalid dumplo)".
> | > | 
> | > | Maybe I didn't make enough swap: I have 64MB RAM, 64MB swap.
> | > 
> | > I am not sure why; looks like a bug to me.
> | > 
> | 
> | I've installed a GENERIC kernel with `options LOCKDEBUG' added. The 
> | backtraces are much more verbose. But I can't grab them. They don't end 
> | up in the dmesg output and I get nothing from savecore.
> | 
> | Is there another way to get at those messages? Perhaps in single user 
> | before swap is configured?
> | 
> | What i did from ddb is...
> | 
> | t /l
> | continue
> | 
> | ... it sync'd disks then rebooted.
> | 
> | This seems to be a serious problem, should I be filing a PR once I get a 
> | reasonable backtrace?
> | 
> | BTW - It looks like this is definitely happening with ftp processes 
> | only. IPFilter (ipnat) has its basic ftp proxy rules installed, i.e...
> | 
> | map ae0 192.168.1.0/24 -> 0/32 proxy port ftp ftp/tcp
> | 
> | ... I don't know if that could be something, but there it is.
> | 
> | Thanks for helping,
> | 
> | Louis
> | 

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