powerpc/mm: pte_frag abstraction

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In this patch we make the number of pte fragments per level 4 page table
page a variable. Radix level 4 table size is 256 bytes and hence we can
have 256 fragments per level 4 page. We don't update the fragment count
in this patch. We need to do performance measurements to find the right
value for fragment count.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Aneesh Kumar K.V 2016-04-29 23:26:23 +10:00 • committed by Michael Ellerman

parent a3dece6d69

commit 5ed7ecd08a

6 changed files with 22 additions and 2 deletions

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arch/powerpc/include/asm/book3s/64/hash-4k.h

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arch/powerpc/include/asm/book3s/64/hash-64k.h

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arch/powerpc/include/asm/book3s/64/pgtable.h

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arch/powerpc/mm/hash_utils_64.c

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arch/powerpc/mm/pgtable-radix.c

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arch/powerpc/mm/pgtable_64.c

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