Date: Thu, 8 May 2008 13:30:23 -0400 (EDT) From: Mikhail Teterin <mi@symbion.zaytman.com> To: stable@FreeBSD.org Subject: panic dd-ing from a USB "disk" Message-ID: <200805081730.m48HUNjh001532@symbion.zaytman.com>
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Hello!
I had some troubles mounting the filesystem from:
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <MATSHITA DMC-FX12 0100> Removable Direct Access SCSI-2 device
da0: 1.000MB/s transfers
da0: 3886MB (7959552 512 byte sectors: 255H 63S/T 495C)
and decided to just dd the entire da0 to a file, so that the camera
can be disconnected:
dd if=/dev/da0 of=/home/mi/da0.dd bs=16384
The dd-ing was proceeding slowly (600Kb/s) and I stopped watching it...
The machine paniced about an hour later (at 0:52). The timestamp on
/home/mi/da0.dd was 23:45, it was only about 500Mb in size.
The stack is below. Would anybody like to look at the complete
vmcore dump?
The hardware is a quad Opteron with 8Gb RAM. Only 4Gb of these are
used, because it runs 7.x/i386 from April 5th (without PAE) -- for
the sake of NVidia's card.
Please, advise. Thanks!
-mi
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
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Reading symbols from /boot/modules/nvidia.ko...done.
Loaded symbols for /boot/modules/nvidia.ko
Reading symbols from /opt/modules/fuse.ko...done.
Loaded symbols for /opt/modules/fuse.ko
Unread portion of the kernel message buffer:
umass0: at uhub0 port 6 (addr 2) disconnected
(da0:umass-sim0:0:0:0): lost device
Fatal trap 12: page fault while in kernel mode
cpuid = 3; apic id = 03
fault virtual address = 0x0
fault code = supervisor write, page not present
instruction pointer = 0x20:0xc0449702
stack pointer = 0x28:0xeb74b8bc
frame pointer = 0x28:0xeb74b8dc
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 = 13989 (dd)
trap number = 12
panic: page fault
cpuid = 3
Uptime: 12d10h52m16s
(da0:dead_sim0:0:0:0): Synchronize cache failed, status == 0x34, scsi status == 0xc8
Physical memory: 3054 MB
Dumping 334 MB: (CTRL-C to abort) (CTRL-C to abort) (CTRL-C to abort) (CTRL-C to abort) (CTRL-C to abort) (CTRL-C to abort) (CTRL-C to abort) (CTRL-C to abort) 319 303 287 271 255 239 223 207 191 175 159 143 127 111 95 79 63 47 31 15
#0 doadump () at pcpu.h:195
195 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
(kgdb) #0 doadump () at pcpu.h:195
#1 0xc0599f7b in boot (howto=260) at /ibm/src/sys/kern/kern_shutdown.c:418
#2 0xc059a449 in panic (fmt=0x104 <Address 0x104 out of bounds>)
at /ibm/src/sys/kern/kern_shutdown.c:572
#3 0xc077f60d in trap_fatal (frame=0xeb74b87c, eva=40)
at /ibm/src/sys/i386/i386/trap.c:899
#4 0xc077f9aa in trap_pfault (frame=0xeb74b87c, usermode=0, eva=0)
at /ibm/src/sys/i386/i386/trap.c:812
#5 0xc078035c in trap (frame=0xeb74b87c) at /ibm/src/sys/i386/i386/trap.c:490
#6 0xc076637b in calltrap () at /ibm/src/sys/i386/i386/exception.s:139
#7 0xc0449702 in xpt_done (done_ccb=0xc690a000)
at /ibm/src/sys/cam/cam_xpt.c:4856
#8 0xc044b15c in xpt_action (start_ccb=0xc690a000)
at /ibm/src/sys/cam/cam_xpt.c:3057
#9 0xc04462b6 in cam_periph_runccb (ccb=0xc690a000, error_routine=0,
camflags=CAM_FLAG_NONE, sense_flags=1, ds=0xc6aea690)
at /ibm/src/sys/cam/cam_periph.c:878
#10 0xc0453aa1 in daclose (dp=0xcc862600)
at /ibm/src/sys/cam/scsi/scsi_da.c:714
#11 0xc0549b2e in g_disk_access (pp=0xc7e12680, r=0, w=0, e=Variable "e" is not available.)
at /ibm/src/sys/geom/geom_disk.c:152
#12 0xc054ec4d in g_access (cp=0xc8a90380, dcr=-1, dcw=0, dce=0)
at /ibm/src/sys/geom/geom_subr.c:748
#13 0xc05490f3 in g_dev_close (dev=0xca1dad00, flags=Variable "flags" is not available.)
at /ibm/src/sys/geom/geom_dev.c:217
#14 0xc0531f69 in devfs_close (ap=0xeb74ba94)
at /ibm/src/sys/fs/devfs/devfs_vnops.c:372
#15 0xc0623e86 in vn_close (vp=0xcc8c1dd0, flags=1, file_cred=0xca36e700,
td=0xc8552000) at vnode_if.h:228
#16 0xc0623f37 in vn_closefile (fp=0xca19bdc8, td=0xc8552000)
at /ibm/src/sys/kern/vfs_vnops.c:868
#17 0xc0568b14 in fdrop (fp=0xca19bdc8, td=0xc8552000) at file.h:297
#18 0xc056a3c2 in closef (fp=0xca19bdc8, td=0xc8552000)
at /ibm/src/sys/kern/kern_descrip.c:1958
#19 0xc056b371 in fdfree (td=0xc8552000)
at /ibm/src/sys/kern/kern_descrip.c:1668
#20 0xc05775fa in exit1 (td=0xc8552000, rv=256)
at /ibm/src/sys/kern/kern_exit.c:272
#21 0xc0578e1d in sys_exit (td=Could not find the frame base for "sys_exit".
) at /ibm/src/sys/kern/kern_exit.c:98
#22 0xc077fb90 in syscall (frame=0xeb74bd38)
at /ibm/src/sys/i386/i386/trap.c:1035
#23 0xc07663e0 in Xint0x80_syscall () at /ibm/src/sys/i386/i386/exception.s:196
#24 0x00000033 in ?? ()
Previous frame inner to this frame (corrupt stack?)
(kgdb)
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