Re: booting with BootX corrupts memory

On Fri, Aug 18, 2006 at 09:01:13AM +0200, Olaf Hering wrote:

On Fri, Aug 18, 2006 at 02:02:12PM +1000, Benjamin Herrenschmidt wrote:

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On Wed, 2006-08-09 at 06:00 +0200, Niels Kristian Bech Jensen wrote:

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 On Tue, Aug  1, Olaf Hering wrote:

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Booting an old Mac with BootX corrupts memory, the kernel seldom gets
into init. Even the built-in initramfs archive gets corrupted. So far I
havent figured out where the corruption starts. The only data point so
far is that a passed initrd gets overwritten with stuff that looks like
part of the device-tree after the call to free_area_init_node() from
paging_init(). Perhaps the virtual/real address mapping isnt handled
correctly.

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This is broken since at least 2.6.15, 2.6.14 dies very early, 2.6.13 was
still ok.

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Symptoms differ, depending on used .config and wether an initrd is passed.

I think I've been hit by this bug on my beige G3 running Ubuntu Edgy.

When booting with initrd the boot process stops before any kernel output (CONFIG_BOOTX_TEXT is not enabled).
Booting without initrd works fine - at least until it cannot find the root filesystem driver. ;-)

Does this patch helps ?

No, now I dont even get console= output on serial console.

It doesnt work on a 7200, butit works on a beige G3.
But later it locks up in 'PM: Adding info for No Bus:target0:0',
after mesh init. This one is likely unrelated.