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Date: Tue, 15 Mar 2011 16:56:47 -0700
From: "Justin P. Mattock" <justinmattock@gmail.com>
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To: "Luis R. Rodriguez" <lrodriguez@atheros.com>
CC: Luis Rodriguez <Luis.Rodriguez@Atheros.com>,
	Bob Copeland <me@bobcopeland.com>,
	Christoph Lameter <cl@linux.com>,
	David Rientjes <rientjes@google.com>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
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	Pekka Enberg <penberg@cs.helsinki.fi>,
	Jiri Slaby <jirislaby@gmail.com>,
	Nick Kossifidis <mickflemm@gmail.com>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: <IRQ> [<ffffffff810c9204>] ? __alloc_pages_nodemask+0x622/0x696
References: <AANLkTikaLb_xan2ePfo9JCZ1w7RZ76wF8NUT2tYr0ZD=@mail.gmail.com> <alpine.DEB.2.00.1103051847100.8779@chino.kir.corp.google.com> <4D770178.9070908@gmail.com> <alpine.DEB.2.00.1103091254540.13353@chino.kir.corp.google.com> <4D77EEB4.9090404@gmail.com> <alpine.DEB.2.00.1103091549020.16989@router.home> <20110310000502.GA13763@hash.localnet> <20110315205946.GL11878@tux> <4D7FDA14.7000904@gmail.com> <20110315221312.GR11878@tux>
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On 03/15/2011 03:13 PM, Luis R. Rodriguez wrote:
> On Tue, Mar 15, 2011 at 02:28:52PM -0700, Justin P. Mattock wrote:
>> On 03/15/2011 01:59 PM, Luis R. Rodriguez wrote:
>>> On Wed, Mar 09, 2011 at 04:05:02PM -0800, Bob Copeland wrote:
>>>> On Wed, Mar 09, 2011 at 03:54:24PM -0600, Christoph Lameter wrote:
>>>>> [ 7419.322770] wlan0: associated
>>>>> [ 7427.161366] ath: Failed to stop TX DMA in 100 msec after killing last frame
>>>>> [ 7427.161432] ath: Failed to stop TX DMA!
>>>>> [ 7434.492398] ath: Failed to stop TX DMA in 100 msec after killing last frame
>>>>> [ 7434.492462] ath: Failed to stop TX DMA!
>>>>> [ 7603.339047]
>>>>> =============================================================================
>>>>> [ 7603.339053] BUG radix_tree_node: Padding overwritten. 0xffff88000008fe00-0xffff88000008fe32
>>>>
>>>>> Could the ath driver corrupt memory if the TX DMA cannot be stopped?
>>>
>>> Yes, this is why we have had a series of patches to address this upstream,
>>> the latest one was for RX DMA failing to stop but Felix found a fix for that.
>>> Apart from that I am not aware of more issues. Can you please try with
>>> wireless-testing.git ?
>>>
>>>     Luis
>>> --
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>> sure..
>>
>> as for seeing this issue. nothing really now on the current. only
>> message I see is:
>>
>> [   69.551295] ath: Failed to stop TX DMA in 100 msec after killing last
>> frame
>> [   69.551336] ath: Failed to stop TX DMA!
>
> Can you easily reproduce?
>
>    Luis
>

at this point I have seen this a few times now. but as for reproducing I 
can try and see.(cloning the wireless tree and loading it up)

Justin P. Mattock