linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Masahiko KIMOTO <masahiko.kimoto@cybertrust.co.jp>
To: andrew@lunn.ch
Cc: f.fainelli@gmail.com, fugang.duan@nxp.com,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	hiraku.toyooka@cybertrust.co.jp
Subject: Re: [RFC PATCH 0/1] net: phy: skip autoneg of ethernet(fec) on network boot
Date: Tue, 10 Jul 2018 10:52:30 +0900 (JST)	[thread overview]
Message-ID: <20180710.105230.2160849304208584873.kimoto@cybertrust.co.jp> (raw)
In-Reply-To: <20180709144106.GJ10376@lunn.ch>

  > >   > I completely acknowledge and support the use case, but your
  > >   > implementation is definitively not the way to go. In my experience the
  > >   > problem is usually that there may be a disagreement on the
  > >   > Pause/Asym_Pause advertisement bits and that alone is responsible for
  > >   > triggering a re-negotiation. Can yo check if that is the case here?
  > > 
  > > Thank you for your support.
  > > 
  > > Concening the problem about PAUSE/Asym_PAUSE advertisement you pointed out,
  > > I could not understand your consideration.
  > > 
  > > Would you tell me more detail about it?
  > 
  > Hi Masahiko
  > 
  > You said that the PHY is being configured 3 times, and might be doing
  > auto-neg three times. Often a phy will not actually perform auto-neg,
  > or do it much faster, if the advertised bits do not change with each
  > re-configuration.
  > 
  > So check how u-boot is configuring what is advertised, and look at
  > what Linux is configuring. In particularly, look at the pause
  > configuration. If pause is configured different in u-boot and Linux,
  > try to make it the same. Things might go faster than.

Thank you.

I'll try to check out u-boot side by mii command and Linux(server)
side by ethtool.

---------------------------------------------------------------------------
Masahiko KIMOTO,Ph.D. / Cybertrust Japan Co., Ltd. 
mail: masahiko.kimoto@cybertrust.co.jp
web: https://www.cybertrust.co.jp/ https://www.miraclelinux.com/

  reply	other threads:[~2018-07-10  1:53 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1530857230-31124-1-git-send-email-masahiko.kimoto@cybertrust.co.jp>
2018-07-06 18:41 ` [RFC PATCH 0/1] net: phy: skip autoneg of ethernet(fec) on network boot Florian Fainelli
2018-07-09  9:29   ` Masahiko KIMOTO
2018-07-09 14:41     ` Andrew Lunn
2018-07-10  1:52       ` Masahiko KIMOTO [this message]
2018-07-17  1:47         ` Masahiko KIMOTO

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180710.105230.2160849304208584873.kimoto@cybertrust.co.jp \
    --to=masahiko.kimoto@cybertrust.co.jp \
    --cc=andrew@lunn.ch \
    --cc=f.fainelli@gmail.com \
    --cc=fugang.duan@nxp.com \
    --cc=hiraku.toyooka@cybertrust.co.jp \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).