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

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Message-ID: <1361291809.19353.145.camel@edumazet-glaptop>
Date:	Tue, 19 Feb 2013 08:36:49 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Marc MERLIN <marc@...lins.org>
Cc:	Johannes Berg <johannes@...solutions.net>,
	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, 2013-02-19 at 08:18 -0800, Marc MERLIN wrote:

> 
> 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?
> 

Maybe these things also need order-1 pages to work ;)

Any kmem_cache using order-1 or order-2 pages can not allocate new slabs

For example, TCP sockets can not be allocated anymore, and fork() might
not work anymore (kernel stacks need order-1 pages)

I dont remember your case, but do you use CONFIG_COMPACTION=y ?



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