From: Alex Ghiti <alex@xxxxxxxx> Date: Tue, 5 Mar 2019 02:01:03 -0500 > 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 ? You should probably put conditional on SPARC64.
