[Zesty][PATCH 6/6] powerpc/mm/hugetlb: Allow runtime allocation of 16G.

Victor Aoqui victora at linux.vnet.ibm.com
Tue Oct 17 10:52:53 UTC 2017

From: "Aneesh Kumar K.V" <aneesh.kumar at linux.vnet.ibm.com>

BugLink: http://bugs.launchpad.net/bugs/1724120

Now that we have GIGANTIC_PAGE enabled on powerpc, use this for 16G hugepages
with hash translation mode. Depending on the total system memory we have, we may
be able to allocate 16G hugepages runtime. This also remove the hugetlb setup
difference between hash/radix translation mode.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
(cherry picked from commit 4ae279c2c96ab38a78b954d218790a8f6db714e5)
Signed-off-by: Victor Aoqui <victora at linux.vnet.ibm.com>
 arch/powerpc/include/asm/book3s/64/hugetlb.h | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/hugetlb.h b/arch/powerpc/include/asm/book3s/64/hugetlb.h
index 3adc49a74a0d..c12f524df3d4 100644
--- a/arch/powerpc/include/asm/book3s/64/hugetlb.h
+++ b/arch/powerpc/include/asm/book3s/64/hugetlb.h
@@ -54,9 +54,7 @@ static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
 static inline bool gigantic_page_supported(void)
-	if (radix_enabled())
-		return true;
-	return false;
+	return true;

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