freebsd stable - Feb 2013 - FreeBSD 9.1 occasional kernel panic

Hi,

recently I've switched from 8.3 to 9.1 on my home box and are quite
pleased but occasionally I get a kernel panic like this:

Feb  5 19:55:45 magni kernel: /dev: got error 6 while accessing filesystem
Feb  5 19:55:45 magni kernel: panic: softdep_deallocate_dependencies:
unrecovered I/O error
Feb  5 19:55:45 magni kernel: cpuid = 1
Feb  5 19:55:45 magni kernel: KDB: stack backtrace:
Feb  5 19:55:45 magni kernel: #0 0xffffffff809208a6 at kdb_backtrace+0x66
Feb  5 19:55:45 magni kernel: #1 0xffffffff808ea8be at panic+0x1ce
Feb  5 19:55:45 magni kernel: #2 0xffffffff80b08d30 at clear_remove+0
Feb  5 19:55:45 magni kernel: #3 0xffffffff80966cd0 at brelse+0x60
Feb  5 19:55:45 magni kernel: #4 0xffffffff8096a14c at bufwrite+0xfc
Feb  5 19:55:45 magni kernel: #5 0xffffffff80b0bd47 at
softdep_process_journal+0x867
Feb  5 19:55:45 magni kernel: #6 0xffffffff80b0bf0a at jwait+0x9a
Feb  5 19:55:45 magni kernel: #7 0xffffffff80b0c2b0 at flush_deplist+0x80
Feb  5 19:55:45 magni kernel: #8 0xffffffff80b0d531 at
softdep_sync_metadata+0x1b1
Feb  5 19:55:45 magni kernel: #9 0xffffffff80b2236b at ffs_syncvnode+0x44b
Feb  5 19:55:45 magni kernel: #10 0xffffffff80b22f91 at ffs_fsync+0x41
Feb  5 19:55:45 magni kernel: #11 0xffffffff8098c600 at sys_fsync+0x160
Feb  5 19:55:45 magni kernel: #12 0xffffffff80bd7ae6 at amd64_syscall+0x546
Feb  5 19:55:45 magni kernel: #13 0xffffffff80bc3447 at Xfast_syscall+0xf7

It does not happen very often but when it happens it mostly happens 
several times in a row. When I'm booting into single user while within 
such a "series" I seem to be able to reproduce the panic.
If I mount my partitions one at a time the panic occurs several seconds 
after I mount my geli encrypted home partition.

System specs:
Gigabyte GA-EP35-DS3P
Intel Core 2 Duo E8500
4 GB DDR2-800
3 HDDs (2x SATA, 1 SATA (Intel SSD))

System is installed on the SSD.

Any ideas where this could be originating from?

Regards,

Jens

-- 
06. Hornung 2013, 09:20
Homepage : http://www.jan0sch.de

Why don't you fix your little problem... and light this candle?
		-- Alan Shepard, the first American into space, Gemini
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on 06/02/2013 10:29 Jens Jahnke said the following:
> Hi,
> 
> recently I've switched from 8.3 to 9.1 on my home box and are quite
pleased
> but occasionally I get a kernel panic like this:
> 
> Feb  5 19:55:45 magni kernel: /dev: got error 6 while accessing filesystem 
> Feb  5 19:55:45 magni kernel: panic: softdep_deallocate_dependencies:
> unrecovered I/O error Feb  5 19:55:45 magni kernel: cpuid = 1 Feb  5
19:55:45
> magni kernel: KDB: stack backtrace: Feb  5 19:55:45 magni kernel: #0
> 0xffffffff809208a6 at kdb_backtrace+0x66 Feb  5 19:55:45 magni kernel: #1
> 0xffffffff808ea8be at panic+0x1ce Feb  5 19:55:45 magni kernel: #2
> 0xffffffff80b08d30 at clear_remove+0 Feb  5 19:55:45 magni kernel: #3
> 0xffffffff80966cd0 at brelse+0x60 Feb  5 19:55:45 magni kernel: #4
> 0xffffffff8096a14c at bufwrite+0xfc Feb  5 19:55:45 magni kernel: #5
> 0xffffffff80b0bd47 at softdep_process_journal+0x867 Feb  5 19:55:45 magni
> kernel: #6 0xffffffff80b0bf0a at jwait+0x9a Feb  5 19:55:45 magni kernel:
#7
> 0xffffffff80b0c2b0 at flush_deplist+0x80 Feb  5 19:55:45 magni kernel: #8
> 0xffffffff80b0d531 at softdep_sync_metadata+0x1b1 Feb  5 19:55:45 magni
> kernel: #9 0xffffffff80b2236b at ffs_syncvnode+0x44b Feb  5 19:55:45 magni
> kernel: #10 0xffffffff80b22f91 at ffs_fsync+0x41 Feb  5 19:55:45 magni
> kernel: #11 0xffffffff8098c600 at sys_fsync+0x160 Feb  5 19:55:45 magni
> kernel: #12 0xffffffff80bd7ae6 at amd64_syscall+0x546 Feb  5 19:55:45 magni
> kernel: #13 0xffffffff80bc3447 at Xfast_syscall+0xf7
> 
> It does not happen very often but when it happens it mostly happens several
> times in a row. When I'm booting into single user while within such a
> "series" I seem to be able to reproduce the panic. If I mount my
partitions
> one at a time the panic occurs several seconds after I mount my geli
> encrypted home partition.
> 
> System specs: Gigabyte GA-EP35-DS3P Intel Core 2 Duo E8500 4 GB DDR2-800 3
> HDDs (2x SATA, 1 SATA (Intel SSD))
> 
> System is installed on the SSD.
> 
> Any ideas where this could be originating from?
"error 6" is ENXIO, which usually corresponds to a disappearing device
or some
such.  Do you get anything in logs (or other objective experience) that could
look like that?

-- 
Andriy Gapon