Kernel panic when loading snd_ai2s module

[Justin Hibbits]

On Thu, Apr 29, 2010 at 10:14 PM, Super Biscuit <super_bisquit at yahoo.com>wrote:

>
>
> --- On *Fri, 4/30/10, Justin Hibbits <jrh29 at alumni.cwru.edu>* wrote:
>
>
> From: Justin Hibbits <jrh29 at alumni.cwru.edu>
> Subject: Kernel panic when loading snd_ai2s module
> To: "FreeBSD PowerPC ML" <freebsd-ppc at freebsd.org>
> Date: Friday, April 30, 2010, 2:07 AM
>
> lock order reversal:
> 1st 0xd47cc118 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2559
> 2nd 0x177c200 dirhash (dirhash) @ /usr/src/sys/ufs/ufs/ufs_dirhash.c:285
> KDB: stack backtrace:
> 0xdafa9760: at kdb_backtrace+0x4c
> 0xdafa9870: at_witness_debugger+0x3c
> 0xdafa97a0:at
>  witness_checkorder+0x8d0
> 0xdafa9800: at _sx_xcloxk+0x90
> 0xdafa9830: at ufsdirhash_acquire+0x40
> 0xdafa9850: at ufsdirhash_remove+0x2c
> 0xdafa98c0: at ufs_remove+0x8c
> 0xdafa9900: at VOP_REMOVE_APV+0xe0
> 0xdafa9920: at kern_unlinkat+0x22c
> 0xdafa9a60: at kern_unlink+0x28
> 0xdafa9a80: at unlink+0x1c
> 0xdafa9aa0: at trap+0x37c
> 0xdafa9b60: at powerpc_interrupt+0x100
> 0xdafa9b90: user SC trap by 0x41957238:srr1=0xd032
>             r1=0x7fffc4e0 cr=0x20000042 xer=0 ctr=0x41957230
>
> I'm not able to run kgdb on it.
>
>
Super, please don't hijack threads.  That LOR is not related to this kernel
panic.  Also, please check the rules for LOR posts, at
http://sources.zabbadoz.net/freebsd/lor.html