Re: MP kernel doesn't boot

[Michael <macallan%netbsd.org@localhost>]

Hello,

On Nov 14, 2008, at 12:18 PM, BERTRAND Joel wrote:

> Manuel Bouyer a écrit :
> > Hi,
>
>         Hello,
>
> > An up-to-date current fails to boot on a dual-CPU ss10
> > (SPARCstation 10 MP (2 X 390Z55), No Keyboard):
> > Rebooting with  
> > command:                                               Boot  
> > device: /iommu/sbus/espdma@f,400000/esp@f,800000/sd@3,0  File and  
> > args:
> > > > NetBSD/sparc Secondary Boot, Revision 1.15
> > > > (builds%b0.netbsd.org@localhost, Mon Apr 28 21:05:09 UTC 2008)
> > Booting netbsd
> > 3444696+99664+327156 [228144+216910]=0x42e170
> > OBP version 3, revision 2.25 (plugin rev 2)
> > Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,  
> > 2005,
> >    2006, 2007, 2008
> >    The NetBSD Foundation, Inc.  All rights reserved.
> > Copyright (c) 1982, 1986, 1989, 1991, 1993
> >    The Regents of the University of California.  All rights reserved.
> > NetBSD 4.99.62 (GENERIC.MP) #1: Thu May  1 15:09:15 CEST 2008
> >        bouyer@rock:/dsk/l1/misc/bouyer/tmp/sparc/obj/dsk/l1/misc/ 
> > bouyer/current/src/sys/arch/sparc/compile/GENERIC.MP
> > total memory = 111 MB
> > avail memory = 104 MB
> > data fault: pc=0xf01de5c0 addr=0x0  
> > sfsr=126<PERR=0,LVL=1,AT=1,FT=1,FAV,OW>
> > data fault: pc=0xf01e3c00 addr=0x0  
> > sfsr=126<PERR=0,LVL=1,AT=1,FT=1,FAV,OW>
> > data fault: pc=0xf01e3c00 addr=0x0  
> > sfsr=126<PERR=0,LVL=1,AT=1,FT=1,FAV,OW>
> > [...]
> > data fault: pc=0xf01e3c00 addr=0x0  
> > sfsr=126<PERR=0,LVL=1,AT=1,FT=1,FAV,OW>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc4<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc1<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc6<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc3<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc0<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc5<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc2<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc7<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc4<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc1<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc6<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc3<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc0<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc5<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc2<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc7<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc4<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc1<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc6<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc3<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc0<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc5<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc2<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc7<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc4<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc1<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc6<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc3<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc0<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc5<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc2<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc7<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc4<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc1<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc6<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc3<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc0<S,PS>
> > trap type 0x2: pc=0xf0002000 npc=0xf0002004 psr=40000fc5<S,PS>
> > Watchdog Reset
> > Any idea ?
> > A UP kernel boots fine on this system.
>
>         Same constatation with a dual RT626 SS20 (512 MB) and last kernel
> (NetBSD-5.0 beta 20081113). Any news ?

Yes, sparc MP support is horribly broken right now. Known problem with  
a known solution but nobody with the right combination of time, skill  
and hardware.
The problem is, that the new MP code wants to play with all struct  
cpuinfo befire cpus attach which results in the crash above because on  
sparc struct cpuinfo for any secondary CPUs is allocated when they  
attach. The short term solution is to have - for now - all SMP kernels  
statically allocate four struct cpuinfo ( not just one for the boot  
CPU ) since we don't really support hw with more than 4 CPUs anyway.  
In the worst case that wastes two pages which seems acceptable.

have fun
Michael