Date: Tue, 19 Aug 2003 08:52:26 -0500 From: Hari Bhaskaran <subscr@spider.netmails.net> To: Greg 'groggy' Lehey <grog@FreeBSD.org> Cc: FreeBSD Questions <questions@FreeBSD.org> Subject: Re: panic on heavy read/writes (5.1 + vinum) Message-ID: <20030819135226.GA19663@poecilotheria.netmails.net> In-Reply-To: <20030819031532.GA17344@poecilotheria.netmails.net> References: <20030817200141.GA10480@poecilotheria.netmails.net> <20030817235159.GZ15411@wantadilla.lemis.com> <20030819031532.GA17344@poecilotheria.netmails.net>
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There are two files in
/usr/obj/usr/src/sys/DEBUG/modules/usr/src/sys/modules/vinum
One is vinum.ko and the other is vinum.ko.debug (Both are not stripped)
I have tried the gdb dump with vinum.paths pointing to either one
of them and it still gives the error mentioned below ("Attempt to extract..")
--
Hari
On Mon, Aug 18, 2003 at 10:15:32PM -0500, Hari Bhaskaran wrote:
> ok, here is it, trace for kernel panic
>
> NOTE: There seems to a problem in the .gdbinit files
> (I may need your help on that).
>
> panic: free locked buf
> panic messages:
> ---
> Fatal trap 12: page fault while in kernel mode
> fault virtual address = 0x14
> fault code = supervisor write, page not present
> instruction pointer = 0x8:0xc02d15f9
> stack pointer = 0x10:0xd257d858
> frame pointer = 0x10:0xd257d88c
> 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 = 94137 (genattrtab)
> trap number = 12
> panic: page fault
>
> syncing disks, buffers remaining... 2220 2220 panic: free locked buf
> Uptime: 5h12m33s
> Dumping 256 MB
> ata0: resetting devices ..
> done
> 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240
> ---
>
> And here is the output on gdb f & bt commands
>
> (kgdb) f 1
> #1 0xc0303b9a in boot ()
> (kgdb) bt
> #0 0xc030366b in doadump ()
> #1 0xc0303b9a in boot ()
> #2 0xc0303e53 in panic ()
> #3 0xc2758926 in freerq (rq=0xc2ebc8c0) at /usr/src/sys/dev/vinum/vinuminterrupt.c:252
> #4 0xc275882a in complete_rqe (bp=0xc2633024) at /usr/src/sys/dev/vinum/vinuminterrupt.c:
> 230
> #5 0xc0346451 in bufdone ()
> #6 0xc0346354 in bufdonebio ()
> #7 0xc03461b2 in biodone ()
> #8 0xc02d159e in g_dev_done ()
> #9 0xc03461b2 in biodone ()
> #10 0xc02d3d42 in g_io_schedule_up ()
> #11 0xc02d3f38 in g_up_procbody ()
> #12 0xc02f109e in fork_exit ()
>
> Now this trace may be wrong because gdb gave this error when it loaded.
>
> Reading symbols from /usr/obj/usr/src/sys/DEBUG/modules/usr/src/sys/modules/vinum/vinum.ko
> .debug...done.
> Loaded symbols for /usr/obj/usr/src/sys/DEBUG/modules/usr/src/sys/modules/vinum/vinum.ko.d
> ebug
> #0 0xc030366b in doadump ()
> .gdbinit:4: Error in sourced command file:
> Attempt to extract a component of a value that is not a structure.
>
> I have all these in separate files (output, gdbinit files etc) in a zip.
>
> BTW, I was doing a make buildworld while the machine crashed.
> And yes, both kernel and vinum.ko have debugging info.
>
> ettukaali# file /boot/kernel/kernel
> /boot/kernel/kernel: ELF 32-bit LSB executable, Intel 80386, version 1 (FreeBSD), dynamically linked (uses shared libs), not stripped
> ettukaali# ls -al /boot/kernel/kernel
> -r-xr-xr-x 1 root wheel 5455085 Aug 17 23:07 /boot/kernel/kernel
> ettukaali# file /boot/kernel/vinum.ko
> /boot/kernel/vinum.ko: ELF 32-bit LSB shared object, Intel 80386, version 1 (FreeBSD), not stripped
> ettukaali# ls -al /boot/kernel/vinum.ko
> -r-xr-xr-x 1 root wheel 96588 Aug 18 07:34 /boot/kernel/vinum.ko
> ettukaali#
>
> (Aug 17 23:07 is approx when I made the debug kernel)
> (Aug 18 07:34 is approx when I did make installkernel - although I would
> have expected the last-mod-time on vinum.ko to match that of kernel)
>
> Either-way the make buildworld wouldn't have affected any of these files
> since I did it in the afternoon.
>
> --
> Hari
>
>
> On Mon, Aug 18, 2003 at 09:21:59AM +0930, Greg 'groggy' Lehey wrote:
> > Follow the steps at
> > http://www.vinumvm.org/vinum/how-to-debug.html#panic. I can't help
> > you if you don't tell me what's wrong.
>
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