Fresh install of BETA2: console error about a LOR...

[Bjoern A. Zeeb]

On Mon, 15 Aug 2005, Julien Gabel wrote:

> >> During the configuration phase, just after installing 6.0-BETA2 on a
> >> notebook, i got the following message on the console:
> >>
> >> lock order reversal
> >>  1st 0xc097b240 UMA lock (UMA lock) @ /usr/src/sys/vm/uma_core.c:1494
> >>  2nd 0xc1060144 system map (system map) @ /usr/src/sys/vm/vm_kern.c:295
>
> > looks pretty much like
> > 	http://sources.zabbadoz.net/freebsd/lor.html#110
>
> As reported by Thierry Herbelot, the #109 appears on a UP and SMP system,
> but the #110 seems to be SMP only (at least is only reproduced on a HTT
> system with SMP kernel).
>
> When i got the second LOR, it was followed by a panic and a crash (three
> times on four).  It was during 'make buildworld' each time, with this
> message:
>
> Memory modified after free 0xc2af2500(256) val=deadc0df @ 0xc2af2508
> panic: receive: m == 0 so->so_rcv.sb_cc == 4294967295
> cpuid = 0
> KDB: enter: panic
> [thread pid 3908 tid 100152 ]
> Stopped at      kdb_enter+0x30: leave
> db>
>
> I didn't have a crash dump yet, since it was during a post-installation
> phase.  I am currently running an UP kernel to avoid problem, but can
> switch to a SMP one if somebody is interested.

in case you get it a gain please type

db> where

so we'll know the code path where this happens. That might help or
not.

-- 
Bjoern A. Zeeb				bzeeb at Zabbadoz dot NeT