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

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Message-ID: <1361268221.8553.1.camel@jlt4.sipsolutions.net>
Date:	Tue, 19 Feb 2013 11:03:41 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Marc MERLIN <marc@...lins.org>, 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 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.

johannes

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