hyperthreading and tstile

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

I have an NetBSD-current/i386 box with two

cpu0: "Intel(R) Xeon(TM) CPU 2.40GHz"
cpu0: Intel Xeon (686-class), 2392.21 MHz
cpu0: family 0xf model 0x2 stepping 0x7 (id 0xf27)
cpu0: features 0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE>
cpu0: features 0xbfebfbff<MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2>
cpu0: features 0xbfebfbff<SS,HTT,TM,SBF>
cpu0: features1 0x4400<CID,xTPR>

cpus, and hyperthreading was enabled in the BIOS. It froze with
many processes in tstile. One notable problem in dmesg is:

cpu0 at mainbus0 apid 0: Intel(R) Xeon(TM) CPU 2.40GHz, id 0xf27
cpu1 at mainbus0 apid 6: Intel(R) Xeon(TM) CPU 2.40GHz, id 0xf27
cpu2 at mainbus0 apid 1: Intel(R) Xeon(TM) CPU 2.40GHz, id 0xf27
cpu3 at mainbus0 apid 7cpu3: failed to become ready

I switched hyperthreading off, and it is happier, with:

cpu0 at mainbus0 apid 0: Intel(R) Xeon(TM) CPU 2.40GHz, id 0xf27
cpu1 at mainbus0 apid 6: Intel(R) Xeon(TM) CPU 2.40GHz, id 0xf27

Could the tstiles have been because of the cpu which failed to become
ready? Is that really a hardware problem?

Cheers,

Patrick