linux-kernel - Re: [PATCH] cpsw: Fix interrupt storm among other things

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Date:	Tue, 29 Jan 2013 17:15:20 +0530
From:	Mugunthan V N <mugunthanvnm@...com>
To:	Pantelis Antoniou <panto@...oniou-consulting.com>
CC:	Richard Cochran <richardcochran@...il.com>,
	Matt Porter <mporter@...com>,
	Chase Maupin <chase.maupin@...com>, Jason Kridner <jdk@...com>,
	Tony Lindgren <tony@...mide.com>, <linux-omap@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpsw: Fix interrupt storm among other things

On 1/28/2013 6:41 PM, Pantelis Antoniou wrote:
> Fix interrupt storm on bone A4 cause by non-by-the-book interrupt handling.
> While at it, added a non-NAPI mode (which is easier to debug), plus
> some general fixes.
>
> Signed-off-by: Pantelis Antoniou <panto@...oniou-consulting.com>
> ---
>   Documentation/devicetree/bindings/net/cpsw.txt |   1 +
>   drivers/net/ethernet/ti/cpsw.c                 | 222 +++++++++++++++++++++----
>   drivers/net/ethernet/ti/davinci_cpdma.c        |   4 +-
>   drivers/net/ethernet/ti/davinci_cpdma.h        |   2 +-
>   include/linux/platform_data/cpsw.h             |   1 +
>   5 files changed, 194 insertions(+), 36 deletions(-)
I have tested CPSW on AM335x EVM 1.5A with flood ping and i am not
seeing any interrupt storm.
Can you provide more details on how to reproduce the issue.

Regards
Mugunthan V N
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