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Fixes from John Dyson to fix out-of-memory hangs and other problems (such

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as increased swap space usage) related to (incorrectly) paging out the
page tables.
This commit is contained in:
David Greenman 1994-02-08 03:07:58 +00:00
parent 00cf4634ce
commit 98446d4e96
2 changed files with 22 additions and 10 deletions
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16
sys/amd64/amd64/pmap.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.15 1994/01/31 04:18:37 davidg Exp $
* $Id: pmap.c,v 1.16 1994/01/31 23:47:27 davidg Exp $
*/
/*
@ -848,7 +848,7 @@ pmap_remove(pmap, sva, eva)
register pt_entry_t *ptp,*ptq;
vm_offset_t pa;
register pv_entry_t pv;
vm_offset_t asva;
vm_offset_t asva, va;
vm_page_t m;
int oldpte;
@ -943,10 +943,15 @@ pmap_remove(pmap, sva, eva)
*/
if (!pmap_is_managed(pa))
continue;
if (oldpte & PG_M) {
va = i386_ptob(sva);
if (((oldpte & PG_M) && (va < USRSTACK || va > UPT_MAX_ADDRESS))
|| (va >= USRSTACK && va < USRSTACK+(UPAGES*NBPG))) {
m = PHYS_TO_VM_PAGE(pa);
m->flags &= ~PG_CLEAN;
}
pv = pa_to_pvh(pa);
asva = i386_ptob(sva);
pmap_remove_entry(pmap, pv, asva);
@ -995,8 +1000,9 @@ pmap_remove_all(pa)
pmap->pm_stats.wired_count--;
if (pmap_pte_v(pte))
pmap->pm_stats.resident_count--;
if (*(int *)pte & PG_M) {
if (((*(int *)pte & PG_M) && (pv->pv_va < USRSTACK || pv->pv_va > UPT_MAX_ADDRESS))
|| (pv->pv_va >= USRSTACK && pv->pv_va < USRSTACK+(UPAGES*NBPG))) {
m->flags &= ~PG_CLEAN;
}

16
sys/i386/i386/pmap.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.15 1994/01/31 04:18:37 davidg Exp $
* $Id: pmap.c,v 1.16 1994/01/31 23:47:27 davidg Exp $
*/
/*
@ -848,7 +848,7 @@ pmap_remove(pmap, sva, eva)
register pt_entry_t *ptp,*ptq;
vm_offset_t pa;
register pv_entry_t pv;
vm_offset_t asva;
vm_offset_t asva, va;
vm_page_t m;
int oldpte;
@ -943,10 +943,15 @@ pmap_remove(pmap, sva, eva)
*/
if (!pmap_is_managed(pa))
continue;
if (oldpte & PG_M) {
va = i386_ptob(sva);
if (((oldpte & PG_M) && (va < USRSTACK || va > UPT_MAX_ADDRESS))
|| (va >= USRSTACK && va < USRSTACK+(UPAGES*NBPG))) {
m = PHYS_TO_VM_PAGE(pa);
m->flags &= ~PG_CLEAN;
}
pv = pa_to_pvh(pa);
asva = i386_ptob(sva);
pmap_remove_entry(pmap, pv, asva);
@ -995,8 +1000,9 @@ pmap_remove_all(pa)
pmap->pm_stats.wired_count--;
if (pmap_pte_v(pte))
pmap->pm_stats.resident_count--;
if (*(int *)pte & PG_M) {
if (((*(int *)pte & PG_M) && (pv->pv_va < USRSTACK || pv->pv_va > UPT_MAX_ADDRESS))
|| (pv->pv_va >= USRSTACK && pv->pv_va < USRSTACK+(UPAGES*NBPG))) {
m->flags &= ~PG_CLEAN;
}