panic at serial boot

[Andriy Gapon]

on 27/03/2013 00:00 mh at kernel32.de said the following:
> Hi Ho,
> 
> I'm trying to install FreeBSD 10.0-CURRENT snapshot from 23.03.2013 on a Dell
> M620 blade.
> However, I'm getting a panic and drop to db while booting.
> 
> Looks like that:
> 
> Root mount waiting for: usbus1 usbus0
> ugen0.2: <vendor 0x8087> at usbus0
> uhub2: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus0
> ugen1.2: <vendor 0x8087> at usbus1
> uhub3: <vendor 0x8087 product 0x0024, class 9/0, rev 2.00/0.00, addr 2> on usbus1
> Root mount waiting for: usbus1 usbus0
> uhub2: 6 ports with 6 removable, self powered
> uhub3: 8 ports with 8 removable, self powered
> ugen0.3: <no manufacturer> at usbus0
> uhub4: <no manufacturer Gadget USB HUB, class 9/0, rev 2.00/0.00, addr 3> on usbus0
> Root mount waiting for: usbus1 usbus0
> ugen1.3: <Avocent> at usbus1
> ukbd0: <EP1 Interrupt> on usbus1
> kbd0 at ukbd0
> kbd0: ukbd0, generic (0), config:0x0, flags:0x3d0000
> uhub4: 6 ports with 6 removable, self powered
> Root mount waiting for: usbus0
> ugen0.4: <Avocent> at usbus0
> ukbd1: <Keyboard> on usbus0
> kbd2 at ukbd1
> kbd2: ukbd1, generic (0), config:0x0, flags:0x3d0000
> Trying to mount root from ufs:/dev/md0 []...
> start_init: trying /sbin/init
> panic: vm_fault: fault on nofault entry, addr: ffffff80002be000
> cpuid = 15
> KDB: enter: panic
> [ thread pid 4 tid 100101 ]
> Stopped at      kdb_enter+0x3e: movq    $0,kdb_why
> db>
> 
> Any idea where to go from here?
> 
> initially I tried 9.1-STABLE snapshot from the same date, but that one doesn't
> even give serial output while booting. odd thing, but that's another story.
> 
> I just thought since I'm giving -current on this hardware a short and there is a
> problem, it might be worth reporting.
> Anything I should do?

'bt' command at the 'db>' prompt

-- 
Andriy Gapon