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Date: Tue, 18 Oct 2005 09:07:54 -0700
From: Sam Leffler <sam@errno.com>
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To: Kernel Jake <kerneljake@hotmail.com>
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Cc: freebsd-current@freebsd.org
Subject: Re: page fault - 6.0-RC1 i386
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Kernel Jake wrote:
> Sam Leffler wrote:
> 
>> Please try a kernel with at least INVARIANTS.  Better would be a 
>> kernel with
>> INVARIANTS+WITNESS.
> 
> 
> After enabling INVARIANTS+WITNESS (with WITNESS_SKIPSPIN), I see the 
> following in dmesg during bootup:
> 
> Oct 18 00:23:53 daemon kernel: malloc(M_WAITOK) of "32", forcing 
> M_NOWAIT with the following non-sleepable locks held:
> Oct 18 00:23:53 daemon kernel: exclusive sleep mutex ath0 (network 
> driver) r = 0 (0xc15c8d30) locked @ dev/ath/if_ath.c:4642
> Oct 18 00:23:53 daemon kernel: Memory modified after free 
> 0xc174a000(2048) val=1fa00000 @ 0xc174a000
> Oct 18 00:23:53 daemon savecore: no dumps found
> Oct 18 00:23:56 daemon kernel: ath0: link state changed to DOWN
> Oct 18 00:24:06 daemon kernel: malloc(M_WAITOK) of "32", forcing 
> M_NOWAIT with the following non-sleepable locks held:
> Oct 18 00:24:06 daemon kernel: exclusive sleep mutex ath0 (network 
> driver) r = 0 (0xc15c8d30) locked @ dev/ath/if_ath.c:4642
> Oct 18 00:24:06 daemon kernel: ath0: link state changed to UP

Are you operating in 11g w/ protection enabled?  If possible try turning 
off protection at the ap and/or using ifconfig on the local station.

	Sam