linux-kernel - Re: [PATCH] VNIC: Adding support for Cavium ThunderX network controller

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Message-ID: <CA+sq2CfV-90CRvo-FCizkzoxHq-AsfOEDW2Z5pXtnNLNXCfTUg@mail.gmail.com>
Date:	Fri, 31 Oct 2014 22:44:11 +0530
From:	Sunil Kovvuri <sunil.kovvuri@...il.com>
To:	Stephen Hemminger <stephen@...workplumber.org>
Cc:	Robert Richter <rric@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Sunil Goutham <sgoutham@...ium.com>,
	Robert Richter <rrichter@...ium.com>,
	Stefan Assmann <sassmann@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>,
	netdev@...r.kernel.org
Subject: Re: [PATCH] VNIC: Adding support for Cavium ThunderX network controller

On Fri, Oct 31, 2014 at 8:24 AM, Stephen Hemminger
<stephen@...workplumber.org> wrote:
> On Thu, 30 Oct 2014 17:54:34 +0100
> Robert Richter <rric@...nel.org> wrote:
>
>> +#ifdef       VNIC_RSS_SUPPORT
>> +static int rss_config = RSS_IP_HASH_ENA | RSS_TCP_HASH_ENA | RSS_UDP_HASH_ENA;
>> +module_param(rss_config, int, S_IRUGO);
>> +MODULE_PARM_DESC(rss_config,
>> +              "RSS hash config [bits 8:0] (Bit0:L2 extended, 1:IP, 2:TCP, 3:TCP SYN, 4:UDP, 5:L4 extended, 6:ROCE 7:L3 bi-directional, 8:L4 bi-directional)");
>> +#endif
>
> This should managed  be via ethtool ETHTOOL_GRXFH rather than a module parameter.
Thanks, i will add setting hash options via ETHTOOL_SRXFH as well.
The idea here is to have a choice of hash while module load (through
module params) and if it needs to be changed runtime then
via Ethtool.

Sunil.
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