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Date: Tue, 05 Oct 2010 09:24:46 -0700
From: Ben Greear <greearb@candelatech.com>
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To: Johannes Berg <johannes@sipsolutions.net>
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Subject: Re: Crash in agg-tx.c, with ath9k and lots of STA VIFs.
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On 10/05/2010 12:56 AM, Johannes Berg wrote:
> On Mon, 2010-10-04 at 15:42 -0700, Ben Greear wrote:
>
>> I did find a similar crash while debugging a kernel with just symbols
>> compiled in (not kgdb) though:
>
> Doesn't seem all that similar...
>
>> The interesting thing to me is that the 00100104 address is the same in
>> both crashes, though this one is in a different method.
>
> except for that maybe. But this is LIST_POISON1, and with seemingly
> different lists. It may be faster to reproduce if you enable slab/slub
> debugging.
>
>> Also, this is with power-save NOT disabled (I was hoping to
>> hit some debugging code I put in for the other crash..hit this instead.)
>>
>> Oct  4 15:26:15 localhost kernel: BUG: unable to handle kernel paging request at 00100104
>> Oct  4 15:26:15 localhost kernel: IP: [<fc77e038>] cfg80211_unlink_bss+0x4d/0x8d [cfg80211]
>
> Looks like a mac80211 bug, but you snipped the stack trace.

I'll apply your deadlock-fix patch, enable slab debugging, and have another go
at it today.

Thanks!
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com