Ralf Baechle wrote:
On Tue, Jul 31, 2007 at 05:09:51PM +0400, Dajie Tan wrote:
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).
Looking good, applied. Thanks!
Did by coincidence any of you try 64K pages with a 32-bit kernel?
Ralf
I think the following is more complete?
#ifdef CONFIG_64BIT_PHYS_ADDR
-#define PGDIR_SHIFT 21
+#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT + PTE_ORDER - 3))
#else
-#define PGDIR_SHIFT 22
+#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT + PTE_ORDER - 2))
#endif
