Chris Wright wrote:
* Zachary Amsden ([email protected]) wrote:
--- linux-2.6.13.orig/arch/i386/mm/init.c 2005-08-24 09:31:05.000000000 -0700
+++ linux-2.6.13/arch/i386/mm/init.c 2005-08-24 09:31:31.000000000 -0700
@@ -79,6 +79,7 @@ static pte_t * __init one_page_table_ini
{
if (pmd_none(*pmd)) {
pte_t *page_table = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ SetPagePTE(virt_to_page(page_table));
Xen has this on one_md_table_init() as well for pmd.
set_pmd(pmd, __pmd(__pa(page_table) | _PAGE_TABLE));
if (page_table != pte_offset_kernel(pmd, 0))
BUG();
Index: linux-2.6.13/arch/i386/mm/pageattr.c
===================================================================
--- linux-2.6.13.orig/arch/i386/mm/pageattr.c 2005-08-24 09:31:05.000000000 -0700
+++ linux-2.6.13/arch/i386/mm/pageattr.c 2005-08-24 09:31:31.000000000 -0700
@@ -52,8 +52,9 @@ static struct page *split_large_page(uns
address = __pa(address);
addr = address & LARGE_PAGE_MASK;
pbase = (pte_t *)page_address(base);
+ SetPagePTE(virt_to_page(pbase));
for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE) {
- set_pte(&pbase[i], pfn_pte(addr >> PAGE_SHIFT,
+ set_pte(&pbase[i], pfn_pte(addr >> PAGE_SHIFT,
No need to intersperse whitespace cleanups.
addr == address ? prot : PAGE_KERNEL));
}
return base;
@@ -146,6 +147,7 @@ __change_page_attr(struct page *page, pg
BUG_ON(!page_count(kpte_page));
if (cpu_has_pse && (page_count(kpte_page) == 1)) {
+ ClearPagePTE(virt_to_page(kpte));
list_add(&kpte_page->lru, &df_list);
revert_page(kpte_page, address);
}
Index: linux-2.6.13/arch/i386/mm/pgtable.c
===================================================================
--- linux-2.6.13.orig/arch/i386/mm/pgtable.c 2005-08-24 09:31:05.000000000 -0700
+++ linux-2.6.13/arch/i386/mm/pgtable.c 2005-08-24 09:40:22.000000000 -0700
@@ -209,6 +209,7 @@ void pgd_ctor(void *pgd, kmem_cache_t *c
if (PTRS_PER_PMD == 1) {
memset(pgd, 0, USER_PTRS_PER_PGD*sizeof(pgd_t));
+ SetPagePDE(virt_to_page(pgd));
spin_lock_irqsave(&pgd_lock, flags);
}
@@ -227,6 +228,7 @@ void pgd_dtor(void *pgd, kmem_cache_t *c
{
unsigned long flags; /* can be called from interrupt context */
+ ClearPagePDE(virt_to_page(pgd));
This reminds me, Xen had some unconditional use of pgd_dtor I need
to go back and look at.
It looks quite unneeded:
void pgd_dtor(void *pgd, kmem_cache_t *cache, unsigned long unused)
{
unsigned long flags; /* can be called from interrupt context */
if (HAVE_SHARED_KERNEL_PMD) <--- /* PAE */
return;
spin_lock_irqsave(&pgd_lock, flags);
pgd_list_del(pgd);
spin_unlock_irqrestore(&pgd_lock, flags);
}
Leaving the dtor conditional saves an indirect function call ;)
Zach
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