We don't support allocating them runtime. Only supported mechanism as of now is
HMC based hypervisor interface. So disable 16G hugetlb on powernv platform
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
May be this should go to -stable ?. To show the 16G pagesize in
/sys/kernel/mm/hugepages/ confuse users
arch/powerpc/mm/hugetlbpage.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index e1bf5ca397fe..28ea94da0707 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -24,6 +24,7 @@
#include <asm/tlb.h>
#include <asm/setup.h>
#include <asm/hugetlb.h>
+#include <asm/machdep.h>
#ifdef CONFIG_HUGETLB_PAGE
@@ -749,7 +750,8 @@ static int __init add_huge_page_size(unsigned long long
size)
return -EINVAL;
}
} else {
- if (mmu_psize != MMU_PAGE_16M && mmu_psize != MMU_PAGE_16G)
+ if ((mmu_psize != MMU_PAGE_16M && mmu_psize != MMU_PAGE_16G)
+ || (mmu_psize == MMU_PAGE_16G && machine_is(powernv)))
return -EINVAL;
}
#endif
--
2.7.4
