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Fix a stupid bug in the new pmap_remove().

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Arrange for soft modified/referenced flags to be cleared when a page is freed.
This commit is contained in:
Doug Rabson 1998-07-26 18:13:28 +00:00
parent dff85ecbee
commit c99399cccd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=37873
1 changed files with 20 additions and 4 deletions
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24
sys/alpha/alpha/pmap.c
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@ -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:
*