[9fans] kernel panic

[9fans] kernel panic

[erik quanstrom]

unfortuantely, it's not obvious to me which memmove is triggering
this panic.

- erik

ladd# fcpu1: registers for validateaddress 25320
aFLAGS=10202 TRAP=E ECODE=2 PC=F0195E51u SS=5F66 USP=F027F830
l  AX 0082801C  BX F082D098  CX 00000000  DX F082D098
t  SI 00005000  DI 0001E000  BP 00000002
   CS 0010  DS 0008  ES 0008  FS 001B  GS 001B
n  CR0 80010039 CR2 00828058 CR3 0763f000l CR4 000000d0o
  MCA 86a0985d12 MCT 00000000c
  ur f29f42c4 up f0305b38
kpanic: fault: 0x828058

s 1
lock 0xf027f830 loop key 0xdeaddead pc 0xf01961dd held by pc 0xf0195f66 proc 25320
25318:validateaddress pc f01a683c dbgpc     373b     Fault (Running) ut 0 st 27 bss 3f000 qpc f0195949 nl 0 n0
25320:validateaddress pc f015375f dbgpc     3615     Fault (Running) ut 0 st 10 bss 3f000 qpc f0195949 nl 2 n0
pdumpstack disabled
acpu1: exiting
nic: fault: 0x828058

acid: src(0xf0195f66)
/sys/src/9/port/page.c:129
 124		KMap *k;
 125		uchar ct;
 126		int i, hw, dontalloc, color;
 127	
 128		lock(&palloc);
>129		color = getpgcolor(va);
 130		hw = swapalloc.highwater;
 131		for(;;) {
 132			if(palloc.freecount > hw)
 133				break;
 134			if(up->kp && palloc.freecount > 0)
acid: src(0xf01a683c)
/sys/src/libc/386/memmove.s:32
 27	_forward:
 28		MOVL	BX, CX
 29		CLD
 30		SHRL	$2, CX
 31		ANDL	$3, BX
>32		REP;	MOVSL
 33	
 34	/*
 35	 * copy the rest, by bytes
 36	 */
 37		JEQ	_return			/* flags set by above ANDL */

Re: [9fans] kernel panic

[erik quanstrom]

the problem is, the pc reported (PC=8002b70e) doesn't make any
sense for a new kernel.  are you sure you're booting off the cd
and not something older on your hard drive?

- erik

[9fans] kernel panic

[Brad Frank]

Erik,
I am using the nightly built iso from the website, I downloaded it
yesterday 9/26...

Re: [9fans] Kernel Panic

[erik quanstrom]

are you by any chance using an ancient 9load?

i've only seen this problem when upgrading the kernel but not
9load on very old machines that had had a 9load & kernel that
loaded at the mips-inspired 1<<31 (0x80000000).  newer kernels
have a  KZERO of 0xf0000000 and aren't compatable with ancient
9load.  however, new 9loads are compatable with ancient kernels.

- erik

[9fans] Kernel Panic

[Brad Frank]

Can someone please resolve this kernel panic? I downloaded the nightly
image from yesterday, and booted and got this panic...

Flags=10292
Trap=E
Ecode=2
PC=8002b70e
AX=40000000
BX=00000040
CX=80034a74
DX=00000cf8
SI=00000000
DI=80818000
BP=c0001000
CS=0010
DS=0008
ES=0008
FS=0008
GS=0008
CR0=80000011
CR2=40000004
CR3=00000c00
panic: exception/interrupt 14