From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Lunn <andrew@lunn.ch>
Subject: Re: [RFC PATCH net-next 0/2] Configuring PFC stall prevention via
 ethtool
Date: Thu, 16 Nov 2017 03:44:29 +0100
Message-ID: <20171116024429.GG2130@lunn.ch>
References: <1510772411-17054-1-git-send-email-eranbe@mellanox.com>
 <20171116010722.GD2130@lunn.ch>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
        "John W. Linville" <linville@tuxdriver.com>,
        Saeed Mahameed <saeedm@mellanox.com>,
        Gal Pressman <galp@mellanox.com>,
        Ariel Almog <ariela@mellanox.com>,
        Inbar Karmy <inbark@mellanox.com>
To: Eran Ben Elisha <eranbe@mellanox.com>
Return-path: <netdev-owner@vger.kernel.org>
Received: from vps0.lunn.ch ([185.16.172.187]:56181 "EHLO vps0.lunn.ch"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1758331AbdKPCod (ORCPT <rfc822;netdev@vger.kernel.org>);
        Wed, 15 Nov 2017 21:44:33 -0500
Content-Disposition: inline
In-Reply-To: <20171116010722.GD2130@lunn.ch>
Sender: netdev-owner@vger.kernel.org
List-ID: <netdev.vger.kernel.org>

> What do other vendors support? Time? Number of pause frames sent?

So i checked a few Marvell Switches. You can also specify a time. It
is a little bit more complex than that, since the units of time depend
on the link speed. But converting a time in ms to what the register
wants is possible.

So i'm thinking rather than a poorly defined 'Auto', passing a time
would be better.

      Andrew