From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
To: David Miller <davem@davemloft.net>
Cc: bernhard.kaindl@gmx.net, bruce.w.allan@intel.com, netdev@vger.kernel.org
Subject: Re: [PATCH] Regression: e100_phy_init() isolates even selected PHY, causes 10 seconds boot delay
Date: Thu, 29 Oct 2009 06:19:25 -0700 [thread overview]
Message-ID: <9929d2390910290619j65be89f0nd8e00fa460b1723f@mail.gmail.com> (raw)
In-Reply-To: <20091029.060239.202729106.davem@davemloft.net>
On Thu, Oct 29, 2009 at 06:02, David Miller <davem@davemloft.net> wrote:
> From: Bernhard Kaindl <bernhard.kaindl@gmx.net>
> Date: Wed, 30 Sep 2009 22:33:31 +0200
>
>> The current e100.c:e100_phy_init() electrically isolates all
>> the PHYs (even the selected PHY -- for a short time!) from the MII.
>>
>> This happens only for a short duration before the isolation
>> of the selected PHY is reverted, but it's enough to cause a
>> major disturbance in the startup of our e100-based cards:
>>
>> On a number of Embedded/Industry Pentium boards which are in use,
>> the result is that the initial DHCP negotiation takes more
>> than 10 seconds to complete with 2.6.30 and .31, while it's
>> done in a fraction of a second with 2.6.29 and earlier
>> (kernels tested with no delay range from 2.6.23 to 2.6.29)
>>
>> That regression was introduced on March 31 in the by a patch
>> from Bruce which first appeared in 2.6.30-rc3:
>
> Bruce, can you give some feedback on this? I'd like to see this issue
> move forward.
>
> The only reason I haven't applied Bernhard's patch is because I
> haven't seen any feedback from Intel. But I will apply it anyways if
> I don't see reasonable feedback soon.
>
> Thanks.
Bruce has been working on this and we currently have a patch in test.
We should have an updated patch submitted later today or tomorrow.
--
Cheers,
Jeff
prev parent reply other threads:[~2009-10-29 13:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-30 20:33 [PATCH] Regression: e100_phy_init() isolates even selected PHY, causes 10 seconds boot delay Bernhard Kaindl
2009-10-29 13:02 ` David Miller
2009-10-29 13:19 ` Jeff Kirsher [this message]
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=9929d2390910290619j65be89f0nd8e00fa460b1723f@mail.gmail.com \
--to=jeffrey.t.kirsher@intel.com \
--cc=bernhard.kaindl@gmx.net \
--cc=bruce.w.allan@intel.com \
--cc=davem@davemloft.net \
--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