cpu1: failed to become ready

["Aaron J. Grier" <agrier%poofygoof.com@localhost>]

I've been occationally seeing the following on an E7500-based dual CPU
northwood pentium 4 system at work and wondered if it rang any bells for
anybody:

NetBSD 5.1_RC3 (GENERIC) #1: Mon Jul 26 16:22:59 PDT 2010
        
ajgrier@ajgrierdev:/home/ajgrier/obj/i386/home/ajgrier/NetBSD/5/sys/arch/i386/compile/GENERIC
total memory = 2047 MB
avail memory = 1999 MB
timecounter: Timecounters tick every 10.000 msec
timecounter: Timecounter "i8254" frequency 1193182 Hz quality 100
Supermicro P4DP6 (0123456789)
mainbus0 (root)
cpu0 at mainbus0 apid 0: Intel 686-class, 2396MHz, id 0xf24
cpu1 at mainbus0 apid 6cpu1: failed to become ready
cpu2 at mainbus0 apid 1: Intel 686-class, 2396MHz, id 0xf24
cpu3 at mainbus0 apid 7: Intel 686-class, 2396MHz, id 0xf24

also

cpu0 at mainbus0 apid 0: Intel 686-class, 2396MHz, id 0xf24
cpu1 at mainbus0 apid 6: Intel 686-class, 2396MHz, id 0xf24
cpu2 at mainbus0 apid 1cpu2: failed to become ready
cpu3 at mainbus0 apid 7: Intel 686-class, 2396MHz, id 0xf24

when this happens, the kernel hangs after probing USB devices:

fd0 at fdc0 drive 0: 1.44MB, 80 cyl, 2 head, 18 sec
uhub0 at usb0: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhub1 at usb1: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhub2 at usb2: vendor 0x8086 UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
[ hang ]

cpus are 2.4GHz northwood Xeons with hyperthreading enabled:

# cpuctl identify 0
cpu0: Intel Xeon (686-class), 2396.02 MHz, id 0xf24
cpu0: features
0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
cpu0: features 0x3febfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX>
cpu0: features 0x3febfbff<FXSR,SSE,SSE2,SS,HTT,TM>
cpu0: "Intel(R) XEON(TM) CPU 2.40GHz"
cpu0: I-cache 12K uOp cache 8-way, D-cache 8KB 64B/line 4-way
cpu0: L2 cache 512KB 64B/line 8-way
cpu0: ITLB 4K/4M: 64 entries
cpu0: DTLB 4K/4M: 64 entries
cpu0: Initial APIC ID 0
cpu0: Cluster/Package ID 0
cpu0: SMT ID 0
cpu0: family 0f model 02 extfamily 00 extmodel 00

it doesn't happen on every boot.  the system appears otherwise to be
stable.  full dmesg available on request.

-- 
  Aaron J. Grier | "Not your ordinary poofy goof." | 
agrier%poofygoof.com@localhost