netdev - Re: [PATCH] ethtool: add one ethtool option to set relax ordering mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20161221172759.1bc0d0dd@xeon-e3>
Date:   Wed, 21 Dec 2016 17:27:59 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Mao Wenan <maowenan@...wei.com>
Cc:     <netdev@...r.kernel.org>, <jeffrey.t.kirsher@...el.com>
Subject: Re: [PATCH] ethtool: add one ethtool option to set relax ordering
 mode

On Thu, 8 Dec 2016 14:51:38 +0800
Mao Wenan <maowenan@...wei.com> wrote:

> This patch provides one way to set/unset IXGBE NIC TX and RX
> relax ordering mode, which can be set by ethtool.
> Relax ordering is one mode of 82599 NIC, to enable this mode
> can enhance the performance for some cpu architecure.

Then it should be done by CPU architecture specific quirks (preferably in PCI layer)
so that all users get the option without having to do manual intervention.

> example:
> ethtool -s enp1s0f0 relaxorder off
> ethtool -s enp1s0f0 relaxorder on

Doing it via ethtool is a developer API (for testing) not something that makes
sense in production.