Re: [PATCH] x86: fix PAE pmd_bad bootup warning

[Hans Rosenfeld]

On Thu, May 08, 2008 at 08:51:22AM -0700, Dave Hansen wrote:
> Is there anything in your dmesg?

mm/memory.c:127: bad pmd ffff810076801040(80000000720000e7).

> There was a discussion on LKML in the last couple of days about
> pmd_bad() triggering on huge pages.  Perhaps we're clearing the mapping
> with the pmd_none_or_clear_bad(), and *THAT* is leaking the page.

That makes sense. I remember that explicitly munmapping the huge page
would still work, but it doesn't. I don't quite remember what I did back
then to test this, but I probably made some mistake there that led me to
some false conclusions.


-- 
%SYSTEM-F-ANARCHISM, The operating system has been overthrown

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