linux-kernel - Re: <IRQ> [<ffffffff810c9204>] ? __alloc_pages

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Date:	Tue, 15 Mar 2011 14:28:52 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	"Luis R. Rodriguez" <lrodriguez@...eros.com>
CC:	Bob Copeland <me@...copeland.com>,
	Christoph Lameter <cl@...ux.com>,
	David Rientjes <rientjes@...gle.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Nick Piggin <npiggin@...nel.dk>,
	Dave Chinner <dchinner@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Jiri Slaby <jirislaby@...il.com>,
	Nick Kossifidis <mickflemm@...il.com>,
	Luis Rodriguez <Luis.Rodriguez@...eros.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
Subject: Re: <IRQ> [<ffffffff810c9204>] ? __alloc_pages_nodemask+0x622/0x696

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!

which I saw earlier today.. keep in mind I am at the book store so the 
internet is constantly connecting/disconnecting

Justin P. Mattock
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