netdev - Re: am335x: cpsw: interrupt failure

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Date:	Mon, 29 Dec 2014 10:33:26 +0100
From:	Yegor Yefremov <yegorslists@...glemail.com>
To:	Felipe Balbi <balbi@...com>
Cc:	netdev <netdev@...r.kernel.org>,
	"N, Mugunthan V" <mugunthanvnm@...com>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>
Subject: Re: am335x: cpsw: interrupt failure

On Fri, Dec 12, 2014 at 8:19 PM, Yegor Yefremov
<yegorslists@...glemail.com> wrote:
> On Fri, Dec 12, 2014 at 6:32 PM, Felipe Balbi <balbi@...com> wrote:
>> Hi,
>>
>> On Fri, Dec 12, 2014 at 01:00:51PM +0100, Yegor Yefremov wrote:
>>> U-Boot version: 2014.07
>>> Kernel config is omap2plus with enabled USB
>>>
>>> # cat /proc/version
>>> Linux version 3.18.0 (user@...r-VirtualBox) (gcc version 4.8.3
>>> 20140320 (prerelease) (Sourcery CodeBench Lite 2014.05-29) ) #6 SMP
>>> Mon Dec 8 22:47:43 CET 2014
>>
>> Wasn't GCC 4.8.x total crap for building ARM kernels ? IIRC it was even
>> blacklisted. Can you try with 4.9.x just to make sure ?
>
> Will do.

Adding linux-omap. Beginning of this discussion:
http://comments.gmane.org/gmane.linux.network/341427

Quick summary: starting with kernel 3.18 or commit
55601c9f24670ba926ebdd4d712ac3b177232330 am335x (at least BBB and some
custom boards) stalls at high network load. Reproducible via nuttcp
within some minutes

nuttcp -S (on BBB)
nuttcp -t -N 4 -T30m 192.168.1.235 (on host)

As Felipe Balbi suggested, I tried both 4.8.3 and 4.9.2 toolchains,
but both show the same behavior.

Linux version 3.18.0 (user@...r-VirtualBox) (gcc version 4.8.3
20140320 (prerelease) (Sourcery CodeBench Lite 2014.05-29) ) #6 SMP
Mon Dec 8 22:47:43 CET 2014
Linux version 3.18.1 (user@...r-VirtualBox) (gcc version 4.9.2
(Buildroot 2015.02-git-00582-g10b9761) ) #1 SMP Mon Dec 29 09:22:29
CET 2014

Let me know, if you can reproduce this issue.

Thanks.

Yegor
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