netdev - Re: [1/2] 2.6.21-rc7: known regressions

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Message-ID: <20070417003212.GB22804@redhat.com>
Date:	Mon, 16 Apr 2007 20:32:12 -0400
From:	Dave Jones <davej@...hat.com>
To:	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>
Cc:	Adrian Bunk <bunk@...sta.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hans-Georg Rist <hg.rist@....de>, perex@...e.cz,
	alsa-devel@...a-project.org,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Stephen Clark <Stephen.Clark@...lark.us>, jgarzik@...ox.com,
	linux-ide@...r.kernel.org,
	Michal Jaegermann <michal@...pspace.math.ualberta.ca>,
	lenb@...nel.org, linux-acpi@...r.kernel.org,
	netdev@...r.kernel.org, e1000-devel@...ts.sourceforge.net,
	Ingo Molnar <mingo@...e.hu>,
	Ayaz Abdulla <aabdulla@...dia.com>,
	David Miller <davem@...emloft.net>, Andi Kleen <ak@...e.de>,
	Oliver Neukum <oneukum@...e.de>, greg@...ah.com,
	linux-usb-devel@...ts.sourceforge.net, CIJOML <cijoml@...ny.cz>,
	Markus Rechberger <markus.rechberger@....com>,
	v4l-dvb-maintainer@...uxtv.org
Subject: Re: [1/2] 2.6.21-rc7: known regressions

On Mon, Apr 16, 2007 at 05:14:40PM -0700, Brandeburg, Jesse wrote:
 > Adrian Bunk wrote:
 > > Subject    : laptops with e1000: lockups
 > > References :
 > > https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=229603 
 > > Submitter  : Dave Jones <davej@...hat.com>
 > > Handled-By : Jesse Brandeburg <jesse.brandeburg@...el.com>
 > > Status     : problem is being debugged
 > 
 > this is being actively debugged, here is what we have so far:
 > o v2.6.20: crashes during boot, unless noacpi and nousb bootparams used
 > o v2.6.21-rc6: some userspace issue, crashes just after root mount
 > without init=/bin/bash
 > o v2.6.2X: serial console in docking station spews goo at all speeds
 > with console=ttyS0,bbbbn8 . work continues on this, as we don't know if
 > there are kernel panic messages during the hard lock.
 > o fedora 7 test kernel 2948: boots okay, have been using this as only
 > truly working kernel on this machine.
 > 
 > one reproduction of the problem was had with scp -l 5000 <file> <remote>
 > when linked at 100Mb/Full.  Tried probably 20 other times same test with
 > no repro, ugh.
 > 
 > Otherwise, slogging through continues.  We are actively working on this
 > in case it *is* an e1000 issue.  Right now the repro is so unlikely we
 > could hardly tell if we fixed it.

FWIW, I can reproduce this pretty much ondemand, on 100M through
the ethernet port on a netgear wireless AP.
A number of our Fedora7 testers are also able to easily reproduce this.
To isolate e1000, for tomorrows test build I've reverted e1000 to
the same code that was in 2.6.20.  If that works out without causing
hangs, I'll try and narrow down further which of the dozen csets
is responsible.

	Dave

-- 
http://www.codemonkey.org.uk
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