On 2/28/19 1:36 AM, Alexandre Ghiti wrote:
sparc actually supports gigantic pages and selecting
ARCH_HAS_GIGANTIC_PAGE allows it to allocate and free
gigantic pages at runtime.
sparc allows configuration such as huge pages of 16GB,
pages of 8KB and MAX_ORDER = 13 (default):
HPAGE_SHIFT (34) - PAGE_SHIFT (13) = 21 >= MAX_ORDER (13)
Signed-off-by: Alexandre Ghiti <alex@xxxxxxxx>
---
arch/sparc/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index d5dd652fb8cc..053a36246d4d 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -46,6 +46,7 @@ config SPARC
select LOCKDEP_SMALL if LOCKDEP
select NEED_DMA_MAP_STATE
select NEED_SG_DMA_LENGTH
+ select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
config SPARC32
def_bool !64BIT
Hi David,
Do you have any remark regarding this patch before I send a v5 ?
Thanks,
Alex
