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

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Message-Id: <1172644987.11949.90.camel@localhost.localdomain>
Date:	Wed, 28 Feb 2007 07:43:07 +0100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Segher Boessenkool <segher@...nel.crashing.org>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	torvalds@...ux-foundation.org, john stultz <johnstul@...ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linuxppc-dev@...abs.org,
	Paul TBBle Hampson <Paul.Hampson@...ox.com>
Subject: Re: Make sure we populate the initroot filesystem late enough


> It's most likely a red herring, lots of config changes
> make the bug go away on some kernel versions (but not
> on others); the problem is very sensitive to changes in
> memory layout.

I wouldn't be that sure ... I've had problems in the past with PMU based
cpufreq... looks like flushing all caches and hard-resetting the
processor on the fly when there can be pending DMAs might be a source of
trouble... especially on CPUs that don't have working cache flush HW
assist.

Ben.


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