Problem remains with FreeBSD 6.0-RC1 as seen in RELENG_5

[John Baldwin]

On Wednesday 19 October 2005 01:49 pm, Robert Watson wrote:
> On Wed, 19 Oct 2005, John Baldwin wrote:
> > He'll need witness for 'show alllocks' but that will require having the
> > 'hptlock' spin mutex added to witness' spin lock order.  Also, the
> > psuedo-rw lock phk created for filedesc isn't witness checked since it
> > isn't a mutex or sx lock, and it maybe that there is a reversal
> > involving that lock, but it will be tricky to tell if that is the case.
>
> His previous output includes "show witness", so I think he should be all
> set.

After it panic'd early in the boot because hptlock wasn't in the spinlock 
order list. :)

Also, Philip, INVARIANTS requires INVARIANT_SUPPORT, which is why you had the 
error with _sx_assert().

> >>> [Seeing other posts that request kernel config additions to assist with
> >>> debugging, I then tried to install a kernel with the added config of:
> >>> options WITNESS
> >>> and booting failed as such:]
> >>>
> >>> /boot/kernel/acpi.ko text=0x40c0c data=0x2160+0x1090
> >>> syms=[0x4+0x7810+0x4+0xa292] KDB: debugger backends: ddb
> >>> KDB: current backend: ddb
> >>> Copyright (c) 1992-2005 The FreeBSD Project.
> >>> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993,
> >>> 1994 The Regents of the University of California. All rights reserved.
> >>> FreeBSD 6.0-RC1 #1: Wed Oct 19 09:45:23 CDT 2005
> >>>    root@[host-elided]:/usr/obj/usr/src/sys/SMP_DDB
> >>> WARNING: WITNESS option enabled, expect reduced performance.
> >>> Timecounter \"i8254\" frequency 1193182 Hz quality 0
> >>> CPU: Intel Pentium III (997.46-MHz 686-class CPU)
> >>>  Origin = \"GenuineIntel\"  Id = 0x68a  Stepping = 10
> >>>
> >>> Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE
> >>>,M CA,CMOV,PAT,PSE36,MMX,FXSR,SSE> real memory  = 2147418112 (2047 MB)
> >>> avail memory = 2096447488 (1999 MB)
> >>> ACPI APIC Table: <DELL	 PE2550  >
> >>> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> >>> cpu0 (BSP): APIC ID:  1
> >>> cpu1 (AP): APIC ID:  0
> >>> ioapic0: Changing APIC ID to 2
> >>> ioapic1: Changing APIC ID to 3
> >>> MADT: Forcing active-low polarity and level trigger for SCI
> >>> ioapic0 <Version 1.1> irqs 0-15 on motherboard
> >>> ioapic1 <Version 1.1> irqs 16-31 on motherboard
> >>> panic: spin lock hptlock not in order list
> >>> cpuid = 0
> >>> KDB: stack backtrace:
> >>> kdb_backtrace(100,c0903380,0,c085e142,c08a28ac) at 0xc0646395 =
> >>> kdb_backtrace+0x29 panic(c084621f,c085e142,c090c6c0,0,c0845c3a) at
> >>> 0xc062fd4c = panic+0x114 enroll(c085e142,c08a28ac,c096d720,1,c0c20d5c)
> >>> at 0xc064f61b = enroll+0xef
> >>> witness_init(c096d720,c34bfb74,c08dd510,c28000,c0c20d74) at 0xc064e6dd
> >>> = witness_init+0x11d mtx_init(c096d720,c085e142,0,1,c0c20d88) at
> >>> 0xc0628d63 = mtx_init+0x8f hpt_init(0,c1ec00,c1e000,0,c04457e5) at
> >>> 0xc07ac352 = hpt_init+0x16 mi_startup() at 0xc060b1be = mi_startup+0x96
> >>> begin() at 0xc04457e5 = begin+0x2c
> >>> KDB: enter: panic
> >>> [thread pid 0 tid 0 ]
> >>> Stopped at	0xc0646417 = kdb_enter+0x2b:	nop
> >>> db>

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org