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From: Doug Kehn <>
To: Mikael Pettersson <>
Cc:, uClinux <>
Subject: Re: Soft lockup
Date: Sat, 9 Feb 2008 05:19:55 -0800 (PST)	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hi Mikael/All,

--- Mikael Pettersson wrote:

> Anyway, I can think of two things:
> 1. There was some very recent patches by Peter
> Zijlstra
>    addressing hrtimer breakage on arm and some other
>    archs in 2.6.24-git. If uclinux has backported
> some
>    of that stuff then it might explain this issue.
> 2. There is a new native Linux driver for ixp4xx
>    ethernet. Patches for the kernel can
>    be found in the nslu2-linux group's subversion
>    repository. (You'll need new firmware files
> though.)
>    Replacing Intel's IXP400 drivers with this driver
>    should at least tell you if the lockups are
>    related to your use of the Intel drivers.

I'm working through Mikael's suggestions.

A new piece of information is that the soft lockups
only occur when the IXP420 is transmitting.  I started
using unidirectional streams; I don't observe soft
lockups when receiving.  I only observe them when


Never miss a thing.  Make Yahoo your home page.

      parent reply	other threads:[~2008-02-09 13:20 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-04 15:45 Doug Kehn
2008-02-05 15:07 ` Mikael Pettersson
2008-02-06 13:01   ` Doug Kehn
2008-02-09 13:19   ` Doug Kehn [this message]

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