2.6.0-test7-mm1 4G/4G hanging at boot

2.6.0-test7-mm1 4G/4G hanging at boot

[Randy.Dunlap]

I'm seeing this at boot:

Checking if this processor honours the WP bit even in supervisor mode...

then I wait for 1-2 minutes and hit the power button.
This is on an IBM dual-proc P4 (non-HT) with 1 GB of RAM.

Has anyone else seen this?  Suggestions or fixes?

Thanks,
--
~Randy
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Re: 2.6.0-test7-mm1 4G/4G hanging at boot

[Rik van Riel]

On Fri, 17 Oct 2003, Randy.Dunlap wrote:

> then I wait for 1-2 minutes and hit the power button.
> This is on an IBM dual-proc P4 (non-HT) with 1 GB of RAM.
> 
> Has anyone else seen this?  Suggestions or fixes?

Chances are the 8kB stack window isn't 8kB aligned in the
fixmap area, because of other patches interfering.  Try
adding a dummy fixmap page to even things out.

-- 
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it." - Brian W. Kernighan

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Re: 2.6.0-test7-mm1 4G/4G hanging at boot

[Zwane Mwaikambo]

On Fri, 17 Oct 2003, Rik van Riel wrote:

> On Fri, 17 Oct 2003, Randy.Dunlap wrote:
> 
> > then I wait for 1-2 minutes and hit the power button.
> > This is on an IBM dual-proc P4 (non-HT) with 1 GB of RAM.
> > 
> > Has anyone else seen this?  Suggestions or fixes?
> 
> Chances are the 8kB stack window isn't 8kB aligned in the
> fixmap area, because of other patches interfering.  Try
> adding a dummy fixmap page to even things out.

Check the email with subject;
[PATCH][2.6] Fix 4G/4G and WP test lockup

Another thing is, you shouldn't be branching off to that test! Which gcc 
compiler are you using?
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Re: 2.6.0-test7-mm1 4G/4G hanging at boot

[Paul Larson]

On Fri, 2003-10-17 at 13:19, Randy.Dunlap wrote:
> I'm seeing this at boot:
> 
> Checking if this processor honours the WP bit even in supervisor mode...
> 
> then I wait for 1-2 minutes and hit the power button.
> This is on an IBM dual-proc P4 (non-HT) with 1 GB of RAM.
> 
> Has anyone else seen this?  Suggestions or fixes?
> 
This was a problem a while back with a bad check fixed by this patch:
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.0-test3/2.6.0-test3-mm2/broken-out/4g4g-do_page_fault-cleanup.patch
I can't seem to find that it slipped back in anywhere but the problem
sounds identical (minus an error message about invalid kernel-mode
pagefault before).

-Paul Larson


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