netdev - RE: [PATCH 3/6] net: thunderx: Increase transmit queue length

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Message-id: <00b101d12cd8$bd34fea0$379efbe0$@samsung.com>
Date:	Wed, 02 Dec 2015 11:09:15 +0300
From:	Pavel Fedin <p.fedin@...sung.com>
To:	'Eric Dumazet' <eric.dumazet@...il.com>
Cc:	'Sunil Goutham' <sunil.kovvuri@...il.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Sunil.Goutham@...iumnetworks.com,
	'Sunil Goutham' <sgoutham@...ium.com>
Subject: RE: [PATCH 3/6] net: thunderx: Increase transmit queue length

 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


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