Date: Sun, 17 Mar 1996 16:34:23 -0500 (EST) From: "Marc G. Fournier" <scrappy@ki.net> To: stable@freebsd.org Cc: current@freebsd.org Subject: pmap_clear_reference panic in -stable... Message-ID: <Pine.BSF.3.91.960317163115.263A-100000@ki.net>
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Hi...
Not sure if there is active development going on in -stable, or
if its just stuff brought over from -current, so I'm sending this to
both addresses.
Using the March 15th -stable sources to build the following kernel,
I arrived at the office to a system panic, as detailed in my PR submitted.
I'm unable to get any savecore core dump using a -stable kernel, but
-current has been giving me one, so is there a bug with -stable that is
preventing this from working? All I'm able to give is DDB output, and
the only thing in DDB that I know to "give" is the 'trace' output...is there
something else I can do in DDB to give more information for PRs?
Here's the PR...
----[ PR ]----
>Submitter-Id: current-users
>Originator: Marc G. Fournier
>Organization: <Organization of PR author (multiple lines)>
>Confidential: no
>Synopsis: PANIC: pagedaemon/_pmap_clear_reference+0xb2
>Severity: critical
>Priority: high
>Category: kern
>Release: FreeBSD 2.1-STABLE i386
>Class: sw-bug
>Environment:
FreeBSD 2.1-STABLE #4: Sat Mar 16 17:16:06 EST 1996
scrappy@ki.net:/usr/src/sys/compile/kinet
CPU: i486 DX4 (486-class CPU)
Origin = "GenuineIntel" Id = 0x480 Stepping=0
Features=0x3<FPU,VME>
real memory = 16777216 (16384K bytes)
avail memory = 14704640 (14360K bytes)
Probing for devices on PCI bus 0:
chip0 <SiS 85c496> rev 49 on pci0:5
ncr0 <ncr 53c810 scsi> rev 2 int a irq 12 on pci0:11
ncr0 waiting for scsi devices to settle
(ncr0:0:0): "CONNER CFP1060S 1.05GB 243F" type 0 fixed SCSI 2
sd0(ncr0:0:0): Direct-Access
sd0(ncr0:0:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
1013MB (2074880 512 byte sectors)
(ncr0:1:0): "QUANTUM LPS340S 020B" type 0 fixed SCSI 2
sd1(ncr0:1:0): Direct-Access
sd1(ncr0:1:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
327MB (670506 512 byte sectors)
(ncr0:2:0): "QUANTUM LP240S GM240S01X 4.6" type 0 fixed SCSI 2
sd2(ncr0:2:0): Direct-Access
sd2(ncr0:2:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
234MB (479350 512 byte sectors)
(ncr0:3:0): "CONNER CFA540S 13B0" type 0 fixed SCSI 2
sd3(ncr0:3:0): Direct-Access
sd3(ncr0:3:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
515MB (1056708 512 byte sectors)
vga0 <VGA-compatible display device> rev 0 on pci0:15
Probing for devices on the ISA bus:
ed0 at 0x280-0x29f irq 5 maddr 0xd8000 msize 16384 on isa
ed0: address 00:00:c0:86:44:79, type WD8013EPC (16 bit)
vt0 at 0x60-0x6f irq 1 on motherboard
vt0: generic, 80 col, color, 8 scr, mf2-kbd, [R3.20-b24]
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
lpt0 at 0x378-0x37f irq 7 on isa
lpt0: Interrupt-driven port
lp0: TCP/IP capable interface
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 72065B
fd0: 1.44MB 3.5in
aha0 not found at 0x330
npx0 on motherboard
npx0: INT 16 interface
>Description:
Am currently unable to gain a "savecore" core dump after ddb in -stable, so
all I have to give is this DDB output.
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xf48e1000
fault code = supervisor read, page not present
instruction pointer = 0x8:0xf019c666
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 2 (pagedaemon)
interrupts enabled = net tty bio
Stopped at _pmap_clear_reference+0xb2: cmpl $0,0(%edx,%eax,4)
db>tra
_pmap_clear_reference(333000) at pmap_clear_reference+0xb2
_vm_pageout_scan() at vm_pageout_scan+0x38e
_vm_pageout() at vm_pageout+0x1b8
_main() at main+0x46f
begin at begin+0x6b
>How-To-Repeat:
<Code/input/activities to reproduce the problem (multiple lines)>
>Fix:
<How to correct or work around the problem, if known (multiple lines)>
---[ end PR ]---
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