Hello,
I'm running 6.4-PRELEASE, last built on 2008-10-05 with /usr/src updated on the
same day.
I had a panic that looks to me very similiar to the one described here (hence
the subject):
http://lists.freebsd.org/pipermail/freebsd-stable/2008-September/045405.html
What caught my curiosity is the message:
Unread portion of the kernel message buffer:
acd0: WARNING - TEST_UNIT_READY read data overrun 18>0
kernel trap 12 with interrupts disabled
I don't have atapicam built in the kernel and it wasn't loaded, and I'm pretty
sure no media was inserted in my dvdrw unit since the last boot.
The other report has a similar message too (acd1: WARNING - READ_TOC read data
overrun 18>12)
Here's the backtrace:
# kgdb kernel.debug /var/crash/vmcore.2
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd"...
Unread portion of the kernel message buffer:
acd0: WARNING - TEST_UNIT_READY read data overrun 18>0
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x104
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc05419e5
stack pointer = 0x28:0xe5928c00
frame pointer = 0x28:0xe5928c18
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 17 (swi6: task queue)
trap number = 12
panic: page fault
cpuid = 0
Uptime: 22h2m3s
Physical memory: 2031 MB
Dumping 287 MB: 272 256 240 224 208 192 176 160 144 128 112 96 80 64 48 32 16
Reading symbols from /boot/kernel/linux.ko...done.
Loaded symbols for /boot/kernel/linux.ko
Reading symbols from /boot/modules/nvidia.ko...done.
Loaded symbols for /boot/modules/nvidia.ko
Reading symbols from /boot/kernel/acpi.ko...done.
Loaded symbols for /boot/kernel/acpi.ko
Reading symbols from /boot/kernel/linprocfs.ko...done.
Loaded symbols for /boot/kernel/linprocfs.ko
Reading symbols from /boot/kernel/logo_saver.ko...done.
Loaded symbols for /boot/kernel/logo_saver.ko
Reading symbols from /boot/kernel/smbfs.ko...done.
Loaded symbols for /boot/kernel/smbfs.ko
Reading symbols from /boot/kernel/libiconv.ko...done.
Loaded symbols for /boot/kernel/libiconv.ko
Reading symbols from /boot/kernel/libmchain.ko...done.
Loaded symbols for /boot/kernel/libmchain.ko
#0 doadump () at pcpu.h:165
165 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) list *0xc05419e5
0xc05419e5 is in _mtx_lock_sleep (/usr/src/sys/kern/kern_mutex.c:548).
543 * If the current owner of the lock is executing on
another
544 * CPU, spin instead of blocking.
545 */
546 owner = (struct thread *)(v & MTX_FLAGMASK);
547 #ifdef ADAPTIVE_GIANT
548 if (TD_IS_RUNNING(owner)) {
549 #else
550 if (m != &Giant && TD_IS_RUNNING(owner)) {
551 #endif
552 turnstile_release(&m->mtx_object);
(kgdb)
(kgdb) bt full
#0 doadump () at pcpu.h:165
No locals.
#1 0xc054d419 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:410
first_buf_printf = 1
#2 0xc054d7e6 in panic (fmt=0xc0736da9 "%s") at
/usr/src/sys/kern/kern_shutdown.c:566
td = (struct thread *) 0xc6bf0300
bootopt = 260
newpanic = 0
ap = 0xc6bf0300 "`øÆàÚÆ"
buf = "page fault", '\0' <repeats 245 times>
#3 0xc071822c in trap_fatal (frame=0xe5928bc0, eva=0) at
/usr/src/sys/i386/i386/trap.c:838
code = 40
ss = 40
esp = 0
type = 12
softseg = {ssd_base = 0, ssd_limit = 1048575, ssd_type = 27, ssd_dpl =
0, ssd_p = 1, ssd_xx = 0, ssd_xx1 = 0, ssd_def32 = 1, ssd_gran = 1}
msg = 0x0
#4 0xc07178e4 in trap (frame=
{tf_fs = 8, tf_es = 40, tf_ds = 40, tf_edi = -960560384, tf_esi = 4,
tf_ebp = -443380712, tf_isp = -443380756, tf_ebx = -937328156, tf_edx = 6,
tf_ecx = 4, tf_eax = 1, tf_trapno = 12, tf_err = 0, tf_eip = -1068230171, tf_cs
= 32, tf_eflags = 65538, tf_esp = -937328156, tf_ss = 0})
at /usr/src/sys/i386/i386/trap.c:270
td = (struct thread *) 0xc6bf0300
p = (struct proc *) 0xc6bef860
sticks = 4999
type = 12
i = 0
ucode = 0
code = 0
eva = 260
#5 0xc06ffaaa in calltrap () at /usr/src/sys/i386/i386/exception.s:139
No locals.
#6 0xc05419e5 in _mtx_lock_sleep (m=0xc82181e4, tid=3334406912, opts=0,
file=0x0, line=0) at /usr/src/sys/kern/kern_mutex.c:546
owner = (volatile struct thread *) 0x4
v = 6
#7 0xc054c6b9 in _sema_post (sema=0xc82181e4, file=0x0, line=0) at
/usr/src/sys/kern/kern_sema.c:79
No locals.
#8 0xc04705e3 in ata_completed (context=0xc8218198, dummy=1) at
/usr/src/sys/dev/ata/ata-queue.c:481
request = (struct ata_request *) 0xc8218198
ch = (struct ata_channel *) 0xc6cd6a00
atadev = (struct ata_device *) 0xc6ddcc00
composite = (struct ata_composite *) 0x0
#9 0xc05757dd in taskqueue_run (queue=0xc6c8a000) at
/usr/src/sys/kern/subr_taskqueue.c:257
task = (struct task *) 0xc821823c
owned = 0
pending = 1
#10 0xc0575af3 in taskqueue_swi_run (dummy=0x0) at
/usr/src/sys/kern/subr_taskqueue.c:299
No locals.
#11 0xc052fbcb in ithread_execute_handlers (p=0xc6bef860, ie=0xc6c44e80) at
/usr/src/sys/kern/kern_intr.c:682
ih = (struct intr_handler *) 0xc6cc5080
ihn = (struct intr_handler *) 0x0
#12 0xc052fd27 in ithread_loop (arg=0xc6c62550) at
/usr/src/sys/kern/kern_intr.c:766
intr_event = (struct intr_thread *) 0xc6c62550
ie = (struct intr_event *) 0xc6c44e80
td = (struct thread *) 0xc6bf0300
p = (struct proc *) 0xc6bef860
#13 0xc052e4b0 in fork_exit (callout=0xc052fcc0 <ithread_loop>, arg=0x1,
frame=0x1) at /usr/src/sys/kern/kern_fork.c:788
p = (struct proc *) 0xc6bef860
td = (struct thread *) 0x6
#14 0xc06ffb0c in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:208
No locals.
(kgdb)
(kgdb) thread apply all bt
Thread 175 (Thread 100290):
#0 sched_switch (td=0xc7172000, newtd=0xc6bea780, flags=1) at
/usr/src/sys/kern/sched_4bsd.c:959
#1 0xc0555eef in mi_switch (flags=1, newtd=0x0) at
/usr/src/sys/kern/kern_synch.c:420
#2 0xc0573ff9 in sleepq_switch (wchan=0x0) at
/usr/src/sys/kern/subr_sleepqueue.c:464
#3 0xc05741a1 in sleepq_wait_sig (wchan=0xc6d20010) at
/usr/src/sys/kern/subr_sleepqueue.c:560
#4 0xc055592e in msleep (ident=0xc6d20010, mtx=0x0, priority=345, wmesg=0x0,
timo=0) at /usr/src/sys/kern/kern_synch.c:209
#5 0xc058aeb9 in ttysleep (tp=0xc6d20000, chan=0x0, pri=0, wmesg=0x0, timo=0)
at /usr/src/sys/kern/tty.c:2786
#6 0xc0589348 in ttread (tp=0xc6d20000, uio=0xec85fcb0, flag=0) at
/usr/src/sys/kern/tty.c:1888
#7 0xc058e55e in ptsread (dev=0x0, uio=0x0, flag=0) at linedisc.h:100
#8 0xc05155ef in giant_read (dev=0xc7c74200, uio=0x0, ioflag=0) at
/usr/src/sys/kern/kern_conf.c:346
#9 0xc04ea669 in devfs_read_f (fp=0xc7d70d80, uio=0xec85fcb0, cred=0xc85fd200,
flags=0, td=0xc7172000) at /usr/src/sys/fs/devfs/devfs_vnops.c:872
#10 0xc0578f0c in dofileread (td=0xc7172000, fd=0, fp=0xc7d70d80,
auio=0xec85fcb0, offset=Unhandled dwarf expression opcode 0x93
) at file.h:241
#11 0xc0578d20 in kern_readv (td=0xc7172000, fd=16, auio=0x0) at
/usr/src/sys/kern/sys_generic.c:192
#12 0xc0578bdf in read (td=0x0, uap=0x0) at /usr/src/sys/kern/sys_generic.c:116
#13 0xc0718633 in syscall (frame=
{tf_fs = 59, tf_es = 59, tf_ds = 59, tf_edi = -1077942016, tf_esi = 1,
tf_ebp = -1077942056, tf_isp = -326763164, tf_ebx = -1077941876, tf_edx = 0,
tf_ecx = 0, tf_eax = 3, tf_trapno = 0, tf_err = 2, tf_eip = 673128727, tf_cs =
51, tf_eflags = 582, tf_esp = -1077942084, tf_ss = 59})
at /usr/src/sys/i386/i386/trap.c:984
#14 0xc06ffaff in Xint0x80_syscall () at /usr/src/sys/i386/i386/exception.s:200
#15 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
165 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) quit
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