From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pavel Fedin <p.fedin@samsung.com>
Subject: RE: [PATCH 3/6] net: thunderx: Increase transmit queue length
Date: Wed, 02 Dec 2015 11:09:15 +0300
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Cc: 'Sunil Goutham' <sunil.kovvuri@gmail.com>, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	Sunil.Goutham@caviumnetworks.com,
	'Sunil Goutham' <sgoutham@cavium.com>
To: 'Eric Dumazet' <eric.dumazet@gmail.com>
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 Hello!

> > swiotlb: coherent allocation failed for device 0002:01:08.4 size=4198400
> > CPU: 2 PID: 3655 Comm: NetworkManager Tainted: G        W  O    4.2.6+ #201
> > Hardware name: Cavium ThunderX CN88XX
> 
> Are you sure 4.2.6 kernel is suitable for backporting this patch aimed
> for linux-4.5 ?

 Why not? It's just a networking driver. And, i also have the same problem on 4.3 running as KVM guest with VFIO.

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia