Lock order reversal in 5.2-CURRENT

[Colin Percival]

At 11:29 10/08/2004, Terrence Koeman wrote:
>lock order reversal
> 1st 0xc0645aa0 sched lock (sched lock) @ /usr/src/sys/vm/vm_zeroidle.c:156
> 2nd 0xc06748c0 sio (sio) @ /usr/src/sys/dev/sio/sio.c:3039
>
>This LOR is not on http://sources.zabbadoz.net/freebsd/lor.html, so I'm
>guessing this one locked up my system.

This is LOR #013 on bzeeb's list.  There isn't any solution yet, but there is
a simple workaround: unplug the serial console.

Colin Percival