Date: Sat, 14 Feb 1998 16:57:09 -0800 From: Amancio Hasty <hasty@rah.star-gate.com> To: current@FreeBSD.ORG Subject: current is panicky with... Message-ID: <199802150057.QAA13127@rah.star-gate.com>
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During "heavy" i/o I am getting this panic , anyone has a clue as to
why. This started happening as of yesterday, prior to that I didn't
have any problems with compiling a kernel with -g.
Tnks,
Amancio
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xa4
fault code = supervisor read, page not present
instruction pointer = 0x8:0xf01fa8f0
stack pointer = 0x10:0xf47a9d6c
frame pointer = 0x10:0xf47a9d78
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)
interrupt mask = bio
panic: from debugger
panic: from debugger
(kgdb) where
#0 boot (howto=260) at ../../kern/kern_shutdown.c:285
#1 0xf01178c7 in panic (fmt=0xf01013e8 "from debugger")
at ../../kern/kern_shutdown.c:425
#2 0xf0101405 in db_panic (addr=-266360592, have_addr=0, count=1,
modif=0xf47a9bec "") at ../../ddb/db_command.c:432
#3 0xf01012e5 in db_command (last_cmdp=0xf0201aa4, cmd_table=0xf0201904,
aux_cmd_tablep=0xf020e344) at ../../ddb/db_command.c:332
#4 0xf0101472 in db_command_loop () at ../../ddb/db_command.c:454
#5 0xf0103b33 in db_trap (type=12, code=0) at ../../ddb/db_trap.c:71
#6 0xf01c2b81 in kdb_trap (type=12, code=0, regs=0xf47a9d30)
at ../../i386/i386/db_interface.c:157
#7 0xf01d08bf in trap_fatal (frame=0xf47a9d30) at ../../i386/i386/trap.c:837
#8 0xf01d0368 in trap_pfault (frame=0xf47a9d30, usermode=0)
at ../../i386/i386/trap.c:735
#9 0xf01cff97 in trap (frame={tf_es = 16, tf_ds = 16, tf_edi = -266247204,
tf_esi = 0, tf_ebp = -193290888, tf_isp = -193290920,
tf_ebx = -261470208, tf_edx = -261470208, tf_ecx = -193290680,
tf_eax = 0, tf_trapno = 12, tf_err = 0, tf_eip = -266360592, tf_cs = 8,
tf_eflags = 66054, tf_esp = 1, tf_ss = -261470208})
at ../../i386/i386/trap.c:363
#10 0xf01fa8f0 in wfdstrategy (bp=0xf06a4800) at ../../i386/isa/wfd.c:429
#11 0xf0141c7e in spec_strategy (ap=0xf47a9e48)
at ../../miscfs/specfs/spec_vnops.c:557
#12 0xf01af52a in swap_pager_putpages (object=0xf021ba50, m=0xf47a9f00,
count=1, sync=0, rtvals=0xf47a9eb4) at vnode_if.h:1064
#13 0xf01ad492 in default_pager_putpages (object=0xf021ba50, m=0xf47a9f00,
c=1, sync=0, rtvals=0xf47a9eb4) at ../../vm/default_pager.c:129
#14 0xf01bb06a in vm_pager_put_pages (object=0xf021ba50, m=0xf47a9f00,
count=1, sync=0, rtvals=0xf47a9eb4) at ../../vm/vm_pager.c:193
#15 0xf01b9cde in vm_pageout_flush (mc=0xf47a9f00, count=1, sync=0)
at ../../vm/vm_pageout.c:376
#16 0xf01b9c81 in vm_pageout_clean (m=0xf047c870, sync=0)
at ../../vm/vm_pageout.c:359
#17 0xf01ba500 in vm_pageout_scan () at ../../vm/vm_pageout.c:842
#18 0xf01bad32 in vm_pageout () at ../../vm/vm_pageout.c:1259
#19 0xf010b21e in kproc_start (udata=0xf02087b0) at ../../kern/init_main.c:263
#20 0xf01c3e43 in fork_trampoline ()
Cannot access memory at address 0x1fff000.
(kgdb)
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