Date: Tue, 12 Jan 2010 14:21:50 -0500 From: Henry Wong <hwong@lumeta.com> To: freebsd-bugs@FreeBSD.org Cc: Henry Wong <HWong@Lumeta.com> Subject: Re: kern/142728: Panic: Fatal trap 12 in g_io_request Message-ID: <4B4CCBCE.8040004@lumeta.com> In-Reply-To: <201001120250.o0C2o2sI055242@freefall.freebsd.org> References: <201001120250.o0C2o2sI055242@freefall.freebsd.org>
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A further netboot on the resliced disk but reusing the slices and
partitions already
created under 8.0 RELEASE still had a panic.
There is a second type of panic that I'm seeing: Panic:
Fatal trap 9: general protection fault while in kernel mode
cpuid = 2; apic id = 06
instruction pointer = 0x20:0xffffffff805276a7
stack pointer = 0x28:0xffffff81d83164b0
frame pointer = 0x28:0xffffff81d8316500
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 17706 (httpd)
trap number = 9
panic: general protection fault
cpuid = 0
Uptime: 25m36s
Physical memory: 16369 MB
Dumping 3268 MB:panic: bufwrite: buffer is not busy???
cpuid = 0
Uptime: 25m37s
Automatic reboot in 15 seconds - press a key on the console to abort
With this panic, it looks like it is attempting to take a dump (unlike
the trap 12)
but stops with a second panic. There was still no panic dump found in
the swap area.
The addresses from nm -n /boot/kernel/kernel that are near the
instruction pointer are:
ffffffff805273b0 t g_bioq_first
ffffffff805273f0 T g_print_bio
ffffffff805274a0 t g_bioq_lock
ffffffff805274e0 t g_bioq_unlock
ffffffff80527520 T g_unregister_classifier
ffffffff805275a0 T g_register_classifier
ffffffff805275f0 T bio_taskqueue
ffffffff80527670 T g_io_request
ffffffff80527800 T g_io_deliver
ffffffff80527a00 t g_bioq_init
ffffffff80527a30 T g_io_init
ffffffff80527a90 T g_alloc_bio
ffffffff80527ab0 T g_clone_bio
ffffffff80527b40 T g_destroy_bio
ffffffff80527b60 T g_delete_data
ffffffff80527bf0 T g_write_data
ffffffff80527c80 T g_read_data
ffffffff80527d40 T g_io_flush
ffffffff80527dd0 T g_io_getattr
ffffffff80527e80 T g_io_schedule_down
ffffffff805280a0 T g_io_schedule_up
Henry Wong
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