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Date:      Sun, 7 Apr 1996 14:04:14 -0400 (EDT)
From:      "Marc G. Fournier" <>
Subject:   panic: vm_page_free: freeing busy page
Message-ID:  <>

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	Just got to the office today, and on my -stable machine, had a
panic :(  can't seem to get a coredump out of this system, so the
only thing I could put in the PR is the DDB output.

	I had about 3 days uptime on this machine before it happened

Marc G. Fournier | POP Mail  Telnet Acct  DNS Hosting
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>Submitter-Id:   current-users
>Originator:     Marc G. Fournier
>Confidential:   no
>Synopsis:       panic: vm_page_free: freeing busy page
>Severity:       critical
>Priority:       high
>Category:       kern
>Release:        FreeBSD 2.1-STABLE i386
>Class:          sw-bug

FreeBSD 2.1-STABLE #5: Tue Mar 26 14:40:09 EST 1996
CPU: i486 DX4 (486-class CPU)
  Origin = "GenuineIntel"  Id = 0x480  Stepping=0
real memory  = 16777216 (16384K bytes)
avail memory = 14692352 (14348K 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): "QUANTUM FIREBALL1280S 630C" type 0 fixed SCSI 2
sd0(ncr0:0:0): Direct-Access
sd0(ncr0:0:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
1222MB (2503872 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 CFP1060S 1.05GB 243F" type 0 fixed SCSI 2
sd3(ncr0:3:0): Direct-Access
sd3(ncr0:3:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
1013MB (2074880 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
ep0 not found at 0x300
npx0 on motherboard
npx0: INT 16 interface


	After approx. 3 days uptime, the system panic'd

DDB Output:

vm_page_free: offset (270336), bmapped(1), busy(1), PG_BUSY(0)
panic: vm_page_free: freeing busy page

--- trap 12, eip = 0x2a8f7, ebp = 0xefbfdd48 ---


	<Code/input/activities to reproduce the problem (multiple lines)>


	<How to correct or work around the problem, if known (multiple lines)>

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