It works well. If I start xorg+xfce, it can save 2.5MB memory in my system. Thanks, songmao. 2007/7/31, Songmao Tian <tiansm@xxxxxxxxxx>:> Under 32-bit kernel with 4k page, a page is needed for a pgd,> but when page size > 4k, a page will be too much.>> diff --git a/include/asm-mips/pgtable-32.h b/include/asm-mips/pgtable-32.h> index 2fbd47e..2a16240 100644> --- a/include/asm-mips/pgtable-32.h> +++ b/include/asm-mips/pgtable-32.h> @@ -67,7 +67,8 @@ extern int add_temporary_entry(unsigned long entrylo0,> unsigned long entrylo1,> #define PTE_ORDER 0> #endif>> -#define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t))> +/* Using a page for pgd will be a waste when page size > 4k */> +#define PTRS_PER_PGD (1 << (32 - PGDIR_SHIFT))> #define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))>> #define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE)>> -- 为天地立心为生民立命为往圣继绝学为万世开太平
