From c99399cccd785de9919bb1e8347fd19d880f44c8 Mon Sep 17 00:00:00 2001 From: Doug Rabson Date: Sun, 26 Jul 1998 18:13:28 +0000 Subject: [PATCH] Fix a stupid bug in the new pmap_remove(). Arrange for soft modified/referenced flags to be cleared when a page is freed. --- sys/alpha/alpha/pmap.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/sys/alpha/alpha/pmap.c b/sys/alpha/alpha/pmap.c index fbe6717cc05..caf731886bc 100644 --- a/sys/alpha/alpha/pmap.c +++ b/sys/alpha/alpha/pmap.c @@ -43,7 +43,7 @@ * from: @(#)pmap.c 7.7 (Berkeley) 5/12/91 * from: i386 Id: pmap.c,v 1.193 1998/04/19 15:22:48 bde Exp * with some ideas from NetBSD's alpha pmap - * $Id: pmap.c,v 1.4 1998/07/15 20:07:33 dfr Exp $ + * $Id: pmap.c,v 1.5 1998/07/24 09:43:27 dfr Exp $ */ /* @@ -200,7 +200,7 @@ pmap_break(void) { } -#define PMAP_DEBUG_VA(va) if ((va) == 0x120058000) pmap_break(); else +/* #define PMAP_DEBUG_VA(va) if ((va) == 0x120058000) pmap_break(); else */ #endif @@ -1780,12 +1780,12 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offset_t eva) } for (va = sva; va < eva; va = nva1) { - nva1 = alpha_l1trunc(va + ALPHA_L1SIZE - 1); + nva1 = alpha_l1trunc(va + ALPHA_L1SIZE); if (!pmap_pte_v(pmap_lev1pte(pmap, va))) continue; for (; va < eva && va < nva1; va = nva2) { - nva2 = alpha_l2trunc(va + ALPHA_L2SIZE - 1); + nva2 = alpha_l2trunc(va + ALPHA_L2SIZE); if (!pmap_pte_v(pmap_lev2pte(pmap, va))) continue; for (; va < eva && va < nva2; va += PAGE_SIZE) @@ -2762,6 +2762,22 @@ pmap_clear_modify(vm_offset_t pa) } } +/* + * pmap_page_is_free: + * + * Called when a page is freed to allow pmap to clean up + * any extra state associated with the page. In this case + * clear modified/referenced bits. + */ +void +pmap_page_is_free(vm_page_t m) +{ + pv_table_t *ppv; + + ppv = pa_to_pvh(VM_PAGE_TO_PHYS(m)); + ppv->pv_flags = 0; +} + /* * pmap_clear_reference: * -- 2.45.2