netdev - Re: 3.7.8/amd64 full interrupt hangs due to iwlwifi under big nfs copies out

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Message-ID: <20130219161830.GD21764@merlins.org>
Date:	Tue, 19 Feb 2013 08:18:30 -0800
From:	Marc MERLIN <marc@...lins.org>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>, Larry.Finger@...inger.net,
	bhutchings@...arflare.com, linux-wireless@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: 3.7.8/amd64 full interrupt hangs due to iwlwifi under big nfs copies out

On Tue, Feb 19, 2013 at 11:03:41AM +0100, Johannes Berg wrote:
> On Mon, 2013-02-18 at 21:17 -0800, Eric Dumazet wrote:
> 
> > > chrome: page allocation failure: order:1, mode:0x4020
> > > Pid: 8730, comm: chrome Tainted: G           O 3.7.8-amd64-preempt-20121226-fixwd #1
> > > Call Trace:
> > >  <IRQ>  [<ffffffff810d5f38>] warn_alloc_failed+0x117/0x12c
> 
> > You could try to load iwlwifi with amsdu_size_8K set to 0 (disable)
> > 
> > It should hopefully use order-0 pages
> 
> It will, do that then, unfortunately it can't switch at runtime because
> it advertised this support to the access point or clients.

Forgive the newbie question: would the inability to get pages cause
interrupts to be disabled or at least something that would stop the mouse
cursor and the keyboard from working?

Thanks,
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/  
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