Re: systems with -current wm(4) hang?

["John D. Baker" <jdbaker%mylinuxisp.com@localhost>]

On Sun, 22 May 2016, Robert Swindells wrote:

> I think we need to know exactly which make and model of CPU are working
> or not working.

The following PCI (not PCIe) add-on card hangs machine under -current,
works under -7 on both (so far) problem machines:

wm0 at pci2 dev 2 function 0: Intel i82541PI 1000BASE-T Ethernet (rev. 0x05)
wm0: interrupting at ioapic0 pin 18
wm0: 32-bit 33MHz PCI bus
wm0: 64 words (6 address bits) MicroWire EEPROM
wm0: Ethernet address 00:1b:21:9b:14:0c
igphy0 at wm0 phy 1: Intel IGP01E1000 Gigabit PHY, rev. 0
igphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto

The fully-diskless machine (via NetBSD-7 'cpuctl identify 0'):

cpu0: highest basic info 00000002
cpu0: highest extended info 80000004
cpu0: "Intel(R) Pentium(R) 4 CPU 2.00GHz"
cpu0: Intel Pentium 4 (686-class), 1992.76 MHz
cpu0: family 0xf model 0x2 stepping 0x4 (id 0xf24)
cpu0: features 0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE>
cpu0: features 0x3febfbff<MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2>
cpu0: features 0x3febfbff<SS,HTT,TM>
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: microcode version 0x1e, platform ID 2


The semi-diskless machine (via NetBSD-7 'cpuctl identify 0'):

cpu0: highest basic info 00000002
cpu0: highest extended info 80000004
cpu0: "Intel(R) Pentium(R) 4 CPU 2.80GHz"
cpu0: Intel Pentium 4 (686-class), 2800.23 MHz
cpu0: family 0xf model 0x2 stepping 0x9 (id 0xf29)
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>
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: 128 entries
cpu0: DTLB 4K/4M: 64 entries
cpu0: Initial APIC ID 0
cpu0: Cluster/Package ID 0
cpu0: microcode version 0x0, platform ID 2

Although both CPUs claim to support HyperThreading (HTT), the feature
is not enabled (no option in machines' BIOS).


I should note that one can hit "ctrl-alt-ESC" on the wscons console and
drop to DDB.  Backtrace and "ps" don't show anything unusual (that I can
tell).  From there I can reboot the machine.

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