x86: add set_memory_4k to pageattr.c

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Add a new function to force split large pages into 4k pages.
This is needed for some followup optimizations.

I had to add a new field to cpa_data to pass down the information
that try_preserve_large_page should not run.

Right now no set_page_4k() because I didn't need it and all the
specialized users I have in mind would be more comfortable with
pure addresses. I also didn't export it because it's unlikely
external code needs it.

Signed-off-by: Andi Kleen <ak@suse.de>
Cc: andreas.herrmann3@amd.com
Cc: mingo@elte.hu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Andi Kleen 2008-03-12 03:53:29 +01:00 • committed by Ingo Molnar

parent cc61503219

commit c9caa02c52

2 changed files with 17 additions and 4 deletions

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20

arch/x86/mm/pageattr.c

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1

include/asm-x86/cacheflush.h

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