32-bit Kernel for loongson2e currently use 16KB page size to avoid cache alias problem.So, the definiton of PGDIR_SHIFT muse be 12+14. Using 22 in 16K page size do not lead to a serious problem but the number of pages allocated for page table is more than previous. (cat /proc/vmstat | grep nr_page_table_pages) It's been tested on FuLong mini PC(loongson2e inside). Signed-off-by: Dajie Tan <jiankemeng@xxxxxxxxx> --- include/asm-mips/pgtable-32.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/include/asm-mips/pgtable-32.h b/include/asm-mips/pgtable-32.h index 2fbd47e..8d34ebf 100644 --- a/include/asm-mips/pgtable-32.h +++ b/include/asm-mips/pgtable-32.h @@ -46,7 +46,7 @@ extern int add_temporary_entry(unsigned long entrylo0, unsigned long entrylo1, #ifdef CONFIG_64BIT_PHYS_ADDR #define PGDIR_SHIFT 21 #else -#define PGDIR_SHIFT 22 +#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT + PTE_ORDER - 2)) #endif #define PGDIR_SIZE (1UL << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1))
