linux-kernel - Re: Make sure we populate the initroot filesystem late enough

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Date:	Tue, 27 Feb 2007 09:27:24 +1100
From:	Paul TBBle Hampson <Paul.Hampson@...ox.com>
To:	john stultz <johnstul@...ibm.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	torvalds@...ux-foundation.org, linuxppc-dev@...abs.org
Subject: Re: Make sure we populate the initroot filesystem late enough

On Mon, Feb 26, 2007 at 11:27:47AM -0800, john stultz wrote:
> On Sun, 2007-02-25 at 19:00 -0500, David Woodhouse wrote:
>> On Mon, 2006-12-11 at 20:59 +0000, Linux Kernel Mailing List wrote:
> >> 
> >>     Make sure we populate the initroot filesystem late enough

>> This seems to be what's triggering the apparent memory corruption we've
>> been seeing recently -- in the case of the Fedora kernel it manifests
>> itself as a BUG() in cache_alloc_refill() when the pmac ide driver
>> initialises.
>> 
>> Another report was at http://lkml.org/lkml/2006/12/17/4
>> 
>> We've been seeing it on a Mac Mini too, and I managed to reproduce it on
>> my shinybook this evening by booting with 'mem=512M'.

> Just for reference (as its not in the thread linked above), this issue
> disappeared for me after some config changes (I somehow changed my
> selection when I backtracked and then moved forward w/ git bisect).

> I've not been able to reproduce it since, but I know others (BCC'ed on
> this note) have seen it and might prod them to come forth with details
> (and broken .config files)

In my case, disabling CPU_FREQ_PMAC made the failure go away.
After reverting this patch, CPU_FREQ_PMAC is once again operating
successfully, so far.

-- 
-----------------------------------------------------------
Paul "TBBle" Hampson, B.Sc, LPI, MCSE
On-hiatus Asian Studies student, ANU
The Boss, Bubblesworth Pty Ltd (ABN: 51 095 284 361)
Paul.Hampson@...ox.Com

Of course Pacman didn't influence us as kids. If it did,
we'd be running around in darkened rooms, popping pills and
listening to repetitive music.
 -- Kristian Wilson, Nintendo, Inc, 1989

License: http://creativecommons.org/licenses/by/2.1/au/
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