Re: LOR ath

From: Bjoern A. Zeeb <bzeeb-lists_at_lists.zabbadoz.net>
Date: Sun, 17 Oct 2004 09:24:31 +0000 (UTC)
On Sun, 17 Oct 2004, Volker wrote:

> Whenever if_ath is loaded or unloaded, the ahc0 driver enters the game.
>
> After that (kldload), my kernel told me about a LOR:
>
> lock order reversal
>   1st 0xc1a1bc58 ath0 (network driver) _at_
> /usr/src/sys/modules/ath/../../dev/ath/i
> f_ath.c:893
>   2nd 0xc184f620 user map (user map) _at_ /usr/src/sys/vm/vm_map.c:2997
> KDB: stack backtrace:
> kdb_backtrace(0,ffffffff,c0728ee8,c072a388,c06d17ec) at kdb_backtrace+0x29
> witness_checkorder(c184f620,9,c06a7966,bb5) at witness_checkorder+0x540
> _sx_xlock(c184f620,c06a7966,bb5) at _sx_xlock+0x50
> _vm_map_lock_read(c184f5dc,c06a7966,bb5,2000000,c16f3e8c) at
> _vm_map_lock_read+0
> x3b
> vm_map_lookup(cc7a29dc,8055000,2,cc7a29e0,cc7a29d0) at vm_map_lookup+0x26
> vm_fault(c184f5dc,8055000,2,8,c15907d0) at vm_fault+0x69
> trap_pfault(cc7a2aa4,0,8055000) at trap_pfault+0xf2
> trap(18,10,10,8055000,c16cae00) at trap+0x351
> calltrap() at calltrap+0x5

for the archives. I added this as LOR 042:
http://sources.zabbadoz.net/freebsd/lor.html#042

-- 
Bjoern A. Zeeb				bzeeb at Zabbadoz dot NeT
Received on Sun Oct 17 2004 - 07:25:23 UTC

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