freebsd stable - Jun 2003 - SMP goes away after installworld (4.8-STABLE)

Hello,

I installed 4.8-RELEASE a few weeks ago, and since I let
the effort sit stagnant for a while I decided to do the 
cvsup/buildworld/buildkernel/installkernel/installworld/mergemaster/MAKEDEV
steps to get current.

Went fine, rebooted, then noticed that just one CPU was recognized:

 FreeBSD 4.8-STABLE #0: Thu Jun 19 17:05:20 PDT 2003 
     mark@lah-210.mainstreet.net:/usr/src/sys/compile/MDK 
 FreeBSD/SMP: Multiprocessor motherboard 
  cpu0 (BSP): apic id:  0, version: 0x00040011, at 0xfee00000 
  io0 (APIC): apic id:  1, version: 0x00170011, at 0xfec00000 

I confirmed my kernel config was OK, rebuilt it, rebooted
and got the same result.  I also looked at 'mptable' and 'top'
to make sure.

I boot off my backup disk and I get:

 FreeBSD 4.8-RELEASE #0: Thu May 29 14:48:37 PDT 2003 
     mark@lah-210.mainstreet.net:/usr/src/sys/compile/MDK 
 FreeBSD/SMP: Multiprocessor motherboard 
  cpu0 (BSP): apic id:  1, version: 0x00040011, at 0xfee00000 
  cpu1 (AP):  apic id:  0, version: 0x00040011, at 0xfee00000 
  io0 (APIC): apic id:  2, version: 0x00170011, at 0xfec00000 

So, there it is.  Both cpu (also present in mptable and top).
I confirmed that the kernel config is identical.

Any idea what I screwed up on the way to 4.8-STABLE that
lost me the SMP?

Thanks,
-mark

Mark,

Can we check out your kernel config?

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  ----- Original Message ----- 
  From: Mark Kent 
  To: freebsd-stable@freebsd.org 
  Sent: Thursday, June 19, 2003 7:05 PM
  Subject: SMP goes away after installworld (4.8-STABLE)


  Hello,

  I installed 4.8-RELEASE a few weeks ago, and since I let
  the effort sit stagnant for a while I decided to do the 
  cvsup/buildworld/buildkernel/installkernel/installworld/mergemaster/MAKEDEV
  steps to get current.

  Went fine, rebooted, then noticed that just one CPU was recognized:

   FreeBSD 4.8-STABLE #0: Thu Jun 19 17:05:20 PDT 2003 
       mark@lah-210.mainstreet.net:/usr/src/sys/compile/MDK 
   FreeBSD/SMP: Multiprocessor motherboard 
    cpu0 (BSP): apic id:  0, version: 0x00040011, at 0xfee00000 
    io0 (APIC): apic id:  1, version: 0x00170011, at 0xfec00000 

  I confirmed my kernel config was OK, rebuilt it, rebooted
  and got the same result.  I also looked at 'mptable' and 'top'
  to make sure.

  I boot off my backup disk and I get:

   FreeBSD 4.8-RELEASE #0: Thu May 29 14:48:37 PDT 2003 
       mark@lah-210.mainstreet.net:/usr/src/sys/compile/MDK 
   FreeBSD/SMP: Multiprocessor motherboard 
    cpu0 (BSP): apic id:  1, version: 0x00040011, at 0xfee00000 
    cpu1 (AP):  apic id:  0, version: 0x00040011, at 0xfee00000 
    io0 (APIC): apic id:  2, version: 0x00170011, at 0xfec00000 

  So, there it is.  Both cpu (also present in mptable and top).
  I confirmed that the kernel config is identical.

  Any idea what I screwed up on the way to 4.8-STABLE that
  lost me the SMP?

  Thanks,
  -mark
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>> Can we check out your kernel config?
Here it is:  http://a.mainstreet.net/MDK

-mark

I've concluded now that SMP support is a goner in the current
4.8-stable.

I did an install of 4.8-release, made a SMP kernel, verified
it works (mptable, top, boot sequence).

Then I did a complete cvsup (from cvsup10), then the following

 chflags -R noschg /usr/obj/usr
 rm -rf /usr/obj/usr
 cd /usr/src
 make cleandir
 make cleandir

 cd /usr/src
 make buildworld
 make buildkernel KERNCONF=MDK
 make installkernel KERNCONF=MDK
 make installworld
 mergemaster
 cd /dev
 sh MAKEDEV all
 cd /usr/src/release/sysinstall
 make all install

No evidence of SMP (mptable, top, boot sequence).
So, I double-checked the config
(http://a.mainstreet.net/MDK)
rebuilt a kernel, rebooted, same result (no SMP).

Anyone else either have SMP working on 4.8-stable
and/or knows that it doesn't?

Thanks,
-mark

I've determined that my SMP problem is not a freebsd problem
but a problem with the server itself.

On a cold boot (power removed then power applied)
it finds both cpu, as reported by the bios boot sequence:

  Intel(R) Pentium(R) III processor  750 MHz
  Intel(R) Pentium(R) III processor  750 MHz

but on a warm boot (reboot, "hit any key to restart", toggle front
button)
it finds only one processor.

Thanks for the replies and sorry for the false alarm.
-mark