netdev - Re: NFS/TCP/IPv6 acting strangely in 4.2

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Message-ID: <87zj0mbzsj.fsf@free-electrons.com>
Date:	Wed, 16 Sep 2015 09:15:24 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Damien Thébault <damien.thebault@...ec.com>
Cc:	"linux\@arm.linux.org.uk" <linux@....linux.org.uk>,
	"netdev\@vger.kernel.org" <netdev@...r.kernel.org>,
	"linux-nfs\@vger.kernel.org" <linux-nfs@...r.kernel.org>,
	"trond.myklebust\@primarydata.com" <trond.myklebust@...marydata.com>,
	"anna.schumaker\@netapp.com" <anna.schumaker@...app.com>,
	"linux-arm-kernel\@lists.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: NFS/TCP/IPv6 acting strangely in 4.2

Hi Damien,
 
 On mer., sept. 16 2015, Damien Thébault <damien.thebault@...ec.com> wrote:

> On Fri, 2015-09-11 at 12:38 +0100, Russell King - ARM Linux wrote:
>> I have a recent Marvell Armada 388 board here which uses the mvneta
>> driver.  I'm seeing some weird effects with NFS with it acting as a
>> client.
>
> Hello,
>
> I'm upgrading a Marvelle Armada 370 board using the mvneta driver from
> 4.0 to 4.2 and noticed issues with NFS booting.
> Basically, most of the time init returns with an error code, or
> programs segfault or throw illegal instructions.
>
> Since it worked fine on 4.0 I bisected until I found commit
> a84e32894191cfcbffa54180d78d7d4654d56c20 "net: mvneta: fix refilling
> for Rx DMA buffers".
>
> If I revert this commit, everything seems to get back to normal.
> Could you try it ? The two issues look very similar.

Actually there was a bug with this commit, but a fix had been submitted
and accepted yesterday, you can find him here:
https://patchwork.ozlabs.org/patch/518111/.

Thanks,

Gregory

>
> Regards

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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