Date: Tue, 10 Aug 2010 16:43:41 +0200 (CEST) From: Oliver Fromme <olli@lurza.secnetix.de> To: freebsd-current@FreeBSD.ORG Subject: page fault in pmap_remove_all Message-ID: <201008101443.o7AEhfFl075942@lurza.secnetix.de>
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Hi,
This is i386 -current as of 2010-08-04.
It was building the toolchain for amd64 when it happened.
I'll keep the vmcore around, so I can dig more into it
if someone tells me what to do.
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This GDB was configured as "i386-marcel-freebsd"...
Unread portion of the kernel message buffer:
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x0
fault code = supervisor write, page not present
instruction pointer = 0x20:0xc083bc86
stack pointer = 0x28:0xe50a1a94
frame pointer = 0x28:0xe50a1ac4
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 = 5785 (install)
trap number = 12
panic: page fault
Uptime: 6h13m9s
Physical memory: 951 MB
Dumping 182 MB: 167 151 135 119 103 87 71 55 39 23 7
#0 doadump () at pcpu.h:231
231 __asm("movl %%fs:0,%0" : "=r" (td));
(kgdb) list *0xc083bc86
0xc083bc86 is in pmap_remove_all (atomic.h:318).
313 atomic_readandclear_int(volatile u_int *addr)
314 {
315 u_int res;
316
317 res = 0;
318 __asm __volatile(
319 " xchgl %1,%0 ; "
320 "# atomic_readandclear_int"
321 : "+r" (res), /* 0 */
322 "=m" (*addr) /* 1 */
(kgdb) backtrace
#0 doadump () at pcpu.h:231
#1 0xc05daef0 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:416
#2 0xc05db11d in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:590
#3 0xc0840583 in trap_fatal (frame=0xe50a1a54, eva=0)
at /usr/src/sys/i386/i386/trap.c:945
#4 0xc08407d0 in trap_pfault (frame=0xe50a1a54, usermode=0, eva=0)
at /usr/src/sys/i386/i386/trap.c:858
#5 0xc0840cf3 in trap (frame=0xe50a1a54) at /usr/src/sys/i386/i386/trap.c:533
#6 0xc082ce2c in calltrap () at /usr/src/sys/i386/i386/exception.s:166
#7 0xc083bc86 in pmap_remove_all (m=0xc150e9e8) at atomic.h:318
#8 0xc07e9544 in vm_fault (map=0xc38463c0, vaddr=684290048,
fault_type=1 '\001', fault_flags=Variable "fault_flags" is not available.
) at /usr/src/sys/vm/vm_fault.c:499
#9 0xc08406c0 in trap_pfault (frame=0xe50a1d28, usermode=1, eva=684290048)
at /usr/src/sys/i386/i386/trap.c:837
#10 0xc0840b5e in trap (frame=0xe50a1d28) at /usr/src/sys/i386/i386/trap.c:399
#11 0xc082ce2c in calltrap () at /usr/src/sys/i386/i386/exception.s:166
#12 0x0804858c in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)
--
Oliver Fromme, secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing b. M.
Handelsregister: Registergericht Muenchen, HRA 74606, Geschäftsfuehrung:
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chen, HRB 125758, Geschäftsführer: Maik Bachmann, Olaf Erb, Ralf Gebhart
FreeBSD-Dienstleistungen, -Produkte und mehr: http://www.secnetix.de/bsd
"The most important decision in [programming] language design
concerns what is to be left out." -- Niklaus Wirth
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