Date: Thu, 1 Jul 2004 13:00:15 -0400 From: Damian Gerow <dgerow@afflictions.org> To: current@freebsd.org Subject: Panic in g_up (bg_fsck/cdparanoia interaction issues?) Message-ID: <20040701170015.GA29451@afflictions.org> In-Reply-To: <20040701155459.GB34978@afflictions.org> References: <20040701155459.GB34978@afflictions.org>
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After a crash and reboot, I start ripping the latter half of the CD,
trying to reproduce the panic:
% cdparanoia -Z -B "7-14[3:21.14]"
It got 3/4 of the way through track 13 before a panic. Note that bg_fsck
has finished processing ad1s1d (/home), and is now working on ad1s1e
(/usr). I am writing to ad1s1d:
Fatal trap 12 = page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0xa00000a
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc067b104
stack pointer = 0x10:0xd4293b98
frame pointer = 0x10:0xd4293ba8
code segment = base 0xa0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, dev32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 3 (g_up)
kernel: type 12 trap, code=0
Stopped at handle_allocindir_partdone+0x40: testb $0x2,0xa(%ecx)
db> panic
panic: from debugger
cpuid = 0;
Debugger("panic")
Fatal trap 3: breakpoint instruction fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer = 0x8:0xc06f8a8e
stack pointer = 0x10:0xd4293944
frame pointer = 0x10:0xd4293950
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
prcoessor eflags = IOPL = 0
current process = 3 (g_up)
Stopped at handle_allocindir_partdone+0x40: testb $0x2,0xa(%ecx)
db> trace
handle_allocindir_partdone(c2125440,0,0,0,cbf3af78) at handle_allocindir_partdone+0x40
softdep_disk_write_complete(cbf3af78,47c89c0,0,246,cbf3af78) at softdep_disk_write_complete+0x14d
vfs_backgroundwritedone(cbf3af78,d4293c04,c055bd14,d4293c28,c055c8fb) at vfs_backgroundwritedone+0x121
bufdone(cbf3af78,0,c101e500,cbf3af78,d4293cbc) at bufdone + 0x12e
bufdonebio(cbf3af78,c0755ba5,c1a9ebb0,cbf3af78,0) at biodone+0xb1
g_dev_done(c1a9ebb0,0,c1aa5990,4,c1a9ebb0) at g_dev_done+0x88
biodone(c1a9ebb0,c07b6ce8,24c,c0755227,a) at biodone+0xb1
g_io_schedule_up(c1984420,c19cabe0,d4293d34,c0520776,0) at g_io_schedule_up+0x117
g_up_procbody(0xd4293d48,0,0,0) at g_up_procbody+0x1e
fork_exit(c04feb24,0,d4293d48) at fork_exit+0x7a
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xd4293d7c, ebp = 0 ---
db> reset
- Damian
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