This commit is dual-purpose, to fix more of the pageout daemon
queue corruption problems, and to apply Gary Palmer's code cleanups. David Greenman helped with these problems also. There is still a hang problem using X in small memory machines.
This commit is contained in:
John Dyson
parent
114a8cff43
commit
f35329ac0f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=16026
@ -39,7 +39,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
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* $Id: pmap.c,v 1.94 1996/05/22 17:07:14 peter Exp $
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* $Id: pmap.c,v 1.95 1996/05/29 05:09:07 dyson Exp $
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*/
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/*
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@ -187,8 +187,6 @@ static __inline int pmap_remove_entry __P((struct pmap *pmap, pv_entry_t *pv,
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vm_offset_t va));
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static int pmap_remove_pte __P((struct pmap *pmap, unsigned *ptq,
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vm_offset_t sva));
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static vm_page_t
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pmap_pte_vm_page __P((pmap_t pmap, vm_offset_t pt));
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static boolean_t
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pmap_testbit __P((vm_offset_t pa, int bit));
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static __inline void pmap_insert_entry __P((pmap_t pmap, vm_offset_t va,
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@ -320,7 +318,6 @@ pmap_qenter(va, m, count)
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int count;
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{
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int i;
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int anyvalid = 0;
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register unsigned *pte;
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for (i = 0; i < count; i++) {
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@ -408,6 +405,21 @@ pmap_is_managed(pa)
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return 0;
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}
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static __inline int
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pmap_unwire_pte_hold(vm_page_t m) {
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vm_page_unhold(m);
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if (m->hold_count == 0) {
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--m->wire_count;
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if (m->wire_count == 0) {
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--cnt.v_wire_count;
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m->dirty = 0;
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vm_page_deactivate(m);
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}
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return 1;
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}
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return 0;
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}
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#if !defined(PMAP_DIAGNOSTIC)
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__inline
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#endif
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@ -436,10 +448,6 @@ pmap_unuse_pt(pmap, va, mpte)
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}
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#endif
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vm_page_unhold(mpte);
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if ((mpte->hold_count == 0) &&
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(mpte->wire_count == 0)) {
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/*
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* We don't free page-table-pages anymore because it can have a negative
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* impact on perf at times. Now we just deactivate, and it'll get cleaned
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@ -447,11 +455,7 @@ pmap_unuse_pt(pmap, va, mpte)
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* brought back into the process address space by pmap_allocpte and be
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* reactivated.
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*/
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mpte->dirty = 0;
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vm_page_deactivate(mpte);
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return 1;
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}
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return 0;
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return pmap_unwire_pte_hold(mpte);
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}
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/*
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@ -979,8 +983,6 @@ pmap_remove_pte(pmap, ptq, va)
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{
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unsigned oldpte;
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pv_entry_t *ppv;
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int i;
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int s;
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oldpte = *ptq;
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*ptq = 0;
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@ -1048,12 +1050,10 @@ pmap_remove(pmap, sva, eva)
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register vm_offset_t eva;
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{
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register unsigned *ptbase;
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vm_offset_t va;
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vm_offset_t pdnxt;
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vm_offset_t ptpaddr;
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vm_offset_t sindex, eindex;
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vm_page_t mpte;
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int s;
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int anyvalid;
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if (pmap == NULL)
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@ -1080,7 +1080,6 @@ pmap_remove(pmap, sva, eva)
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sindex = i386_btop(sva);
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eindex = i386_btop(eva);
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for (; sindex < eindex; sindex = pdnxt) {
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/*
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@ -1096,16 +1095,18 @@ pmap_remove(pmap, sva, eva)
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if (ptpaddr == 0)
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continue;
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if (sindex < i386_btop(UPT_MIN_ADDRESS)) {
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/*
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* get the vm_page_t for the page table page
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*/
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mpte = PHYS_TO_VM_PAGE(ptpaddr);
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mpte = PHYS_TO_VM_PAGE(ptpaddr);
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/*
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* if the pte isn't wired or held, just skip it.
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* if the pte isn't wired, just skip it.
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*/
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if ((mpte->hold_count == 0) && (mpte->wire_count == 0))
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continue;
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if (mpte->wire_count == 0)
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continue;
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}
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/*
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* Limit our scan to either the end of the va represented
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@ -1140,9 +1141,8 @@ pmap_remove_pte_mapping(pa)
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vm_offset_t pa;
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{
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register pv_entry_t pv, *ppv, npv;
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register unsigned *pte, *ptbase;
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register unsigned *pte;
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vm_offset_t va;
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int s;
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int anyvalid = 0;
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ppv = pa_to_pvh(pa);
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@ -1214,6 +1214,8 @@ pmap_remove_all(pa)
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pmap = pv->pv_pmap;
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ptbase = get_ptbase(pmap);
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va = pv->pv_va;
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if (*pmap_pde(pmap, va) == 0)
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continue;
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pte = ptbase + i386_btop(va);
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if (tpte = ((int) *pte)) {
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pmap->pm_stats.resident_count--;
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@ -1284,7 +1286,6 @@ pmap_protect(pmap, sva, eva, prot)
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eindex = i386_btop(eva);
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for (; sindex < eindex; sindex = pdnxt) {
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int pbits;
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pdnxt = ((sindex + NPTEPG) & ~(NPTEPG - 1));
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ptpaddr = (vm_offset_t) *pmap_pde(pmap, i386_ptob(sindex));
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@ -1296,10 +1297,15 @@ pmap_protect(pmap, sva, eva, prot)
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if (ptpaddr == 0)
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continue;
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mpte = PHYS_TO_VM_PAGE(ptpaddr);
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/*
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* Don't look at kernel page table pages
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*/
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if (sindex < i386_btop(UPT_MIN_ADDRESS)) {
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mpte = PHYS_TO_VM_PAGE(ptpaddr);
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if ((mpte->hold_count == 0) && (mpte->wire_count == 0))
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continue;
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if (mpte->wire_count == 0)
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continue;
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}
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if (pdnxt > eindex) {
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pdnxt = eindex;
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@ -1365,6 +1371,7 @@ _pmap_allocpte(pmap, va, ptepindex)
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{
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vm_offset_t pteva, ptepa;
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vm_page_t m;
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int s;
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/*
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* Find or fabricate a new pagetable page
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@ -1388,18 +1395,20 @@ _pmap_allocpte(pmap, va, ptepindex)
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*/
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pmap->pm_pteobj->flags |= OBJ_WRITEABLE;
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if (m->hold_count == 0) {
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s = splvm();
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vm_page_unqueue(m);
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splx(s);
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++m->wire_count;
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++cnt.v_wire_count;
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}
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/*
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* Increment the hold count for the page table page
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* (denoting a new mapping.)
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*/
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++m->hold_count;
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/*
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* Activate the pagetable page, if it isn't already
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*/
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if (m->queue != PQ_ACTIVE)
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vm_page_activate(m);
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/*
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* Map the pagetable page into the process address space, if
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* it isn't already there.
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@ -1407,7 +1416,6 @@ _pmap_allocpte(pmap, va, ptepindex)
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pteva = ((vm_offset_t) vtopte(va)) & PG_FRAME;
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ptepa = (vm_offset_t) pmap->pm_pdir[ptepindex];
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if (ptepa == 0) {
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int s;
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pv_entry_t pv, *ppv;
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pmap->pm_stats.resident_count++;
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@ -1469,9 +1477,14 @@ pmap_allocpte(pmap, va)
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*/
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if ((ptepa & (PG_RW|PG_U|PG_V)) == (PG_RW|PG_U|PG_V)) {
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m = PHYS_TO_VM_PAGE(ptepa);
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if (m->hold_count == 0) {
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int s = splvm();
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vm_page_unqueue(m);
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splx(s);
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++m->wire_count;
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++cnt.v_wire_count;
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}
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++m->hold_count;
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if (m->queue != PQ_ACTIVE)
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vm_page_activate(m);
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return m;
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}
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return _pmap_allocpte(pmap, va, ptepindex);
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@ -1500,9 +1513,7 @@ pmap_enter(pmap, va, pa, prot, wired)
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register unsigned *pte;
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vm_offset_t opa;
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vm_offset_t origpte, newpte;
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vm_offset_t ptepa;
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vm_page_t mpte;
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int s;
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if (pmap == NULL)
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return;
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@ -1779,7 +1790,6 @@ pmap_prefault(pmap, addra, entry, object)
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vm_offset_t addr;
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vm_pindex_t pindex;
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vm_page_t m;
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int pageorder_index;
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if (entry->object.vm_object != object)
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return;
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@ -1893,7 +1903,6 @@ pmap_copy(dst_pmap, src_pmap, dst_addr, len, src_addr)
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vm_offset_t end_addr = src_addr + len;
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vm_offset_t pdnxt;
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unsigned src_frame, dst_frame;
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pd_entry_t pde;
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if (dst_addr != src_addr)
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return;
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@ -1943,8 +1952,8 @@ pmap_copy(dst_pmap, src_pmap, dst_addr, len, src_addr)
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dst_pmap->pm_stats.resident_count++;
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pmap_insert_entry(dst_pmap, addr, dstmpte,
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(ptetemp & PG_FRAME));
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} else {
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--dstmpte->hold_count;
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} else {
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pmap_unwire_pte_hold(dstmpte);
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}
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if (dstmpte->hold_count >= srcmpte->hold_count)
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break;
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@ -2108,6 +2117,8 @@ pmap_testbit(pa, bit)
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continue;
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}
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pte = pmap_pte(pv->pv_pmap, pv->pv_va);
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if (pte == NULL)
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continue;
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if ((int) *pte & bit) {
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splx(s);
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return TRUE;
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@ -2127,7 +2138,7 @@ pmap_changebit(pa, bit, setem)
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boolean_t setem;
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{
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register pv_entry_t pv, *ppv;
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register unsigned *pte, npte;
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register unsigned *pte;
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vm_offset_t va;
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int changed;
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int s;
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@ -2161,6 +2172,8 @@ pmap_changebit(pa, bit, setem)
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}
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pte = pmap_pte(pv->pv_pmap, va);
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if (pte == NULL)
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continue;
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if (setem) {
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*(int *)pte |= bit;
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changed = 1;
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@ -39,7 +39,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
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* $Id: pmap.c,v 1.94 1996/05/22 17:07:14 peter Exp $
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* $Id: pmap.c,v 1.95 1996/05/29 05:09:07 dyson Exp $
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*/
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/*
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@ -187,8 +187,6 @@ static __inline int pmap_remove_entry __P((struct pmap *pmap, pv_entry_t *pv,
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vm_offset_t va));
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static int pmap_remove_pte __P((struct pmap *pmap, unsigned *ptq,
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vm_offset_t sva));
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static vm_page_t
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pmap_pte_vm_page __P((pmap_t pmap, vm_offset_t pt));
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static boolean_t
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pmap_testbit __P((vm_offset_t pa, int bit));
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static __inline void pmap_insert_entry __P((pmap_t pmap, vm_offset_t va,
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@ -320,7 +318,6 @@ pmap_qenter(va, m, count)
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int count;
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{
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int i;
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int anyvalid = 0;
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register unsigned *pte;
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for (i = 0; i < count; i++) {
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@ -408,6 +405,21 @@ pmap_is_managed(pa)
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return 0;
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}
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static __inline int
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pmap_unwire_pte_hold(vm_page_t m) {
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vm_page_unhold(m);
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if (m->hold_count == 0) {
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--m->wire_count;
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if (m->wire_count == 0) {
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--cnt.v_wire_count;
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m->dirty = 0;
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vm_page_deactivate(m);
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}
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return 1;
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}
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return 0;
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}
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#if !defined(PMAP_DIAGNOSTIC)
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__inline
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#endif
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@ -436,10 +448,6 @@ pmap_unuse_pt(pmap, va, mpte)
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}
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#endif
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vm_page_unhold(mpte);
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if ((mpte->hold_count == 0) &&
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(mpte->wire_count == 0)) {
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/*
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* We don't free page-table-pages anymore because it can have a negative
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* impact on perf at times. Now we just deactivate, and it'll get cleaned
|
||||
@ -447,11 +455,7 @@ pmap_unuse_pt(pmap, va, mpte)
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* brought back into the process address space by pmap_allocpte and be
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* reactivated.
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*/
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mpte->dirty = 0;
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vm_page_deactivate(mpte);
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return 1;
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}
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return 0;
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return pmap_unwire_pte_hold(mpte);
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}
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/*
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@ -979,8 +983,6 @@ pmap_remove_pte(pmap, ptq, va)
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{
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unsigned oldpte;
|
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pv_entry_t *ppv;
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int i;
|
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int s;
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oldpte = *ptq;
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*ptq = 0;
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@ -1048,12 +1050,10 @@ pmap_remove(pmap, sva, eva)
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register vm_offset_t eva;
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{
|
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register unsigned *ptbase;
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vm_offset_t va;
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vm_offset_t pdnxt;
|
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vm_offset_t ptpaddr;
|
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vm_offset_t sindex, eindex;
|
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vm_page_t mpte;
|
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int s;
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int anyvalid;
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if (pmap == NULL)
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@ -1080,7 +1080,6 @@ pmap_remove(pmap, sva, eva)
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sindex = i386_btop(sva);
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eindex = i386_btop(eva);
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for (; sindex < eindex; sindex = pdnxt) {
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/*
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@ -1096,16 +1095,18 @@ pmap_remove(pmap, sva, eva)
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if (ptpaddr == 0)
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continue;
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if (sindex < i386_btop(UPT_MIN_ADDRESS)) {
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/*
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* get the vm_page_t for the page table page
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*/
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mpte = PHYS_TO_VM_PAGE(ptpaddr);
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mpte = PHYS_TO_VM_PAGE(ptpaddr);
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/*
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* if the pte isn't wired or held, just skip it.
|
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* if the pte isn't wired, just skip it.
|
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*/
|
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if ((mpte->hold_count == 0) && (mpte->wire_count == 0))
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continue;
|
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if (mpte->wire_count == 0)
|
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continue;
|
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}
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|
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/*
|
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* Limit our scan to either the end of the va represented
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@ -1140,9 +1141,8 @@ pmap_remove_pte_mapping(pa)
|
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vm_offset_t pa;
|
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{
|
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register pv_entry_t pv, *ppv, npv;
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register unsigned *pte, *ptbase;
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register unsigned *pte;
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vm_offset_t va;
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int s;
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int anyvalid = 0;
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ppv = pa_to_pvh(pa);
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@ -1214,6 +1214,8 @@ pmap_remove_all(pa)
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pmap = pv->pv_pmap;
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ptbase = get_ptbase(pmap);
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va = pv->pv_va;
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if (*pmap_pde(pmap, va) == 0)
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continue;
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pte = ptbase + i386_btop(va);
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if (tpte = ((int) *pte)) {
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pmap->pm_stats.resident_count--;
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@ -1284,7 +1286,6 @@ pmap_protect(pmap, sva, eva, prot)
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eindex = i386_btop(eva);
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for (; sindex < eindex; sindex = pdnxt) {
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int pbits;
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pdnxt = ((sindex + NPTEPG) & ~(NPTEPG - 1));
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ptpaddr = (vm_offset_t) *pmap_pde(pmap, i386_ptob(sindex));
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@ -1296,10 +1297,15 @@ pmap_protect(pmap, sva, eva, prot)
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if (ptpaddr == 0)
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continue;
|
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mpte = PHYS_TO_VM_PAGE(ptpaddr);
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/*
|
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* Don't look at kernel page table pages
|
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*/
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if (sindex < i386_btop(UPT_MIN_ADDRESS)) {
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mpte = PHYS_TO_VM_PAGE(ptpaddr);
|
||||
|
||||
if ((mpte->hold_count == 0) && (mpte->wire_count == 0))
|
||||
continue;
|
||||
if (mpte->wire_count == 0)
|
||||
continue;
|
||||
}
|
||||
|
||||
if (pdnxt > eindex) {
|
||||
pdnxt = eindex;
|
||||
@ -1365,6 +1371,7 @@ _pmap_allocpte(pmap, va, ptepindex)
|
||||
{
|
||||
vm_offset_t pteva, ptepa;
|
||||
vm_page_t m;
|
||||
int s;
|
||||
|
||||
/*
|
||||
* Find or fabricate a new pagetable page
|
||||
@ -1388,18 +1395,20 @@ _pmap_allocpte(pmap, va, ptepindex)
|
||||
*/
|
||||
pmap->pm_pteobj->flags |= OBJ_WRITEABLE;
|
||||
|
||||
if (m->hold_count == 0) {
|
||||
s = splvm();
|
||||
vm_page_unqueue(m);
|
||||
splx(s);
|
||||
++m->wire_count;
|
||||
++cnt.v_wire_count;
|
||||
}
|
||||
|
||||
/*
|
||||
* Increment the hold count for the page table page
|
||||
* (denoting a new mapping.)
|
||||
*/
|
||||
++m->hold_count;
|
||||
|
||||
/*
|
||||
* Activate the pagetable page, if it isn't already
|
||||
*/
|
||||
if (m->queue != PQ_ACTIVE)
|
||||
vm_page_activate(m);
|
||||
|
||||
/*
|
||||
* Map the pagetable page into the process address space, if
|
||||
* it isn't already there.
|
||||
@ -1407,7 +1416,6 @@ _pmap_allocpte(pmap, va, ptepindex)
|
||||
pteva = ((vm_offset_t) vtopte(va)) & PG_FRAME;
|
||||
ptepa = (vm_offset_t) pmap->pm_pdir[ptepindex];
|
||||
if (ptepa == 0) {
|
||||
int s;
|
||||
pv_entry_t pv, *ppv;
|
||||
|
||||
pmap->pm_stats.resident_count++;
|
||||
@ -1469,9 +1477,14 @@ pmap_allocpte(pmap, va)
|
||||
*/
|
||||
if ((ptepa & (PG_RW|PG_U|PG_V)) == (PG_RW|PG_U|PG_V)) {
|
||||
m = PHYS_TO_VM_PAGE(ptepa);
|
||||
if (m->hold_count == 0) {
|
||||
int s = splvm();
|
||||
vm_page_unqueue(m);
|
||||
splx(s);
|
||||
++m->wire_count;
|
||||
++cnt.v_wire_count;
|
||||
}
|
||||
++m->hold_count;
|
||||
if (m->queue != PQ_ACTIVE)
|
||||
vm_page_activate(m);
|
||||
return m;
|
||||
}
|
||||
return _pmap_allocpte(pmap, va, ptepindex);
|
||||
@ -1500,9 +1513,7 @@ pmap_enter(pmap, va, pa, prot, wired)
|
||||
register unsigned *pte;
|
||||
vm_offset_t opa;
|
||||
vm_offset_t origpte, newpte;
|
||||
vm_offset_t ptepa;
|
||||
vm_page_t mpte;
|
||||
int s;
|
||||
|
||||
if (pmap == NULL)
|
||||
return;
|
||||
@ -1779,7 +1790,6 @@ pmap_prefault(pmap, addra, entry, object)
|
||||
vm_offset_t addr;
|
||||
vm_pindex_t pindex;
|
||||
vm_page_t m;
|
||||
int pageorder_index;
|
||||
|
||||
if (entry->object.vm_object != object)
|
||||
return;
|
||||
@ -1893,7 +1903,6 @@ pmap_copy(dst_pmap, src_pmap, dst_addr, len, src_addr)
|
||||
vm_offset_t end_addr = src_addr + len;
|
||||
vm_offset_t pdnxt;
|
||||
unsigned src_frame, dst_frame;
|
||||
pd_entry_t pde;
|
||||
|
||||
if (dst_addr != src_addr)
|
||||
return;
|
||||
@ -1943,8 +1952,8 @@ pmap_copy(dst_pmap, src_pmap, dst_addr, len, src_addr)
|
||||
dst_pmap->pm_stats.resident_count++;
|
||||
pmap_insert_entry(dst_pmap, addr, dstmpte,
|
||||
(ptetemp & PG_FRAME));
|
||||
} else {
|
||||
--dstmpte->hold_count;
|
||||
} else {
|
||||
pmap_unwire_pte_hold(dstmpte);
|
||||
}
|
||||
if (dstmpte->hold_count >= srcmpte->hold_count)
|
||||
break;
|
||||
@ -2108,6 +2117,8 @@ pmap_testbit(pa, bit)
|
||||
continue;
|
||||
}
|
||||
pte = pmap_pte(pv->pv_pmap, pv->pv_va);
|
||||
if (pte == NULL)
|
||||
continue;
|
||||
if ((int) *pte & bit) {
|
||||
splx(s);
|
||||
return TRUE;
|
||||
@ -2127,7 +2138,7 @@ pmap_changebit(pa, bit, setem)
|
||||
boolean_t setem;
|
||||
{
|
||||
register pv_entry_t pv, *ppv;
|
||||
register unsigned *pte, npte;
|
||||
register unsigned *pte;
|
||||
vm_offset_t va;
|
||||
int changed;
|
||||
int s;
|
||||
@ -2161,6 +2172,8 @@ pmap_changebit(pa, bit, setem)
|
||||
}
|
||||
|
||||
pte = pmap_pte(pv->pv_pmap, va);
|
||||
if (pte == NULL)
|
||||
continue;
|
||||
if (setem) {
|
||||
*(int *)pte |= bit;
|
||||
changed = 1;
|
||||
|
||||
@ -28,11 +28,12 @@
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id: default_pager.h,v 1.2 1995/12/11 04:57:58 dyson Exp $
|
||||
* $Id: default_pager.h,v 1.3 1995/12/14 09:54:48 phk Exp $
|
||||
*/
|
||||
|
||||
#ifndef _DEFAULT_PAGER_H_
|
||||
#define _DEFAULT_PAGER_H_ 1
|
||||
|
||||
void default_pager_convert_to_swap __P((vm_object_t object));
|
||||
|
||||
#endif /* _DEFAULT_PAGER_H_ */
|
||||
|
||||
@ -66,7 +66,7 @@
|
||||
* any improvements or extensions that they make and grant Carnegie the
|
||||
* rights to redistribute these changes.
|
||||
*
|
||||
* $Id: vm_fault.c,v 1.45 1996/05/19 07:36:45 dyson Exp $
|
||||
* $Id: vm_fault.c,v 1.46 1996/05/26 05:30:33 dyson Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -821,10 +821,12 @@ vm_fault_wire(map, start, end)
|
||||
|
||||
for (va = start; va < end; va += PAGE_SIZE) {
|
||||
|
||||
/*
|
||||
while( curproc != pageproc &&
|
||||
(cnt.v_free_count <= cnt.v_pageout_free_min)) {
|
||||
VM_WAIT;
|
||||
}
|
||||
*/
|
||||
|
||||
rv = vm_fault(map, va, VM_PROT_READ|VM_PROT_WRITE, TRUE);
|
||||
if (rv) {
|
||||
@ -1005,6 +1007,15 @@ vm_fault_additional_pages(m, rbehind, rahead, marray, reqpage)
|
||||
object = m->object;
|
||||
pindex = m->pindex;
|
||||
|
||||
/*
|
||||
* we don't fault-ahead for device pager
|
||||
*/
|
||||
if (object->type == OBJT_DEVICE) {
|
||||
*reqpage = 0;
|
||||
marray[0] = m;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* if the requested page is not available, then give up now
|
||||
*/
|
||||
|
||||
@ -59,7 +59,7 @@
|
||||
* any improvements or extensions that they make and grant Carnegie the
|
||||
* rights to redistribute these changes.
|
||||
*
|
||||
* $Id: vm_glue.c,v 1.48 1996/05/02 09:34:51 phk Exp $
|
||||
* $Id: vm_glue.c,v 1.49 1996/05/18 03:37:37 dyson Exp $
|
||||
*/
|
||||
|
||||
#include "opt_ddb.h"
|
||||
@ -196,7 +196,7 @@ vm_fork(p1, p2)
|
||||
register struct proc *p1, *p2;
|
||||
{
|
||||
register struct user *up;
|
||||
int error, i;
|
||||
int i;
|
||||
pmap_t pvp;
|
||||
vm_object_t upobj;
|
||||
|
||||
@ -204,15 +204,6 @@ vm_fork(p1, p2)
|
||||
VM_WAIT;
|
||||
}
|
||||
|
||||
#if 0
|
||||
/*
|
||||
* avoid copying any of the parent's pagetables or other per-process
|
||||
* objects that reside in the map by marking all of them
|
||||
* non-inheritable
|
||||
*/
|
||||
(void) vm_map_inherit(&p1->p_vmspace->vm_map,
|
||||
UPT_MIN_ADDRESS - UPAGES * PAGE_SIZE, VM_MAX_ADDRESS, VM_INHERIT_NONE);
|
||||
#endif
|
||||
p2->p_vmspace = vmspace_fork(p1->p_vmspace);
|
||||
|
||||
if (p1->p_vmspace->vm_shm)
|
||||
@ -328,13 +319,11 @@ faultin(p)
|
||||
struct proc *p;
|
||||
{
|
||||
vm_offset_t i;
|
||||
vm_offset_t ptaddr;
|
||||
int s;
|
||||
|
||||
if ((p->p_flag & P_INMEM) == 0) {
|
||||
pmap_t pmap = &p->p_vmspace->vm_pmap;
|
||||
vm_page_t stkm, m;
|
||||
int error;
|
||||
vm_page_t m;
|
||||
vm_object_t upobj = p->p_vmspace->vm_upages_obj;
|
||||
|
||||
++p->p_lock;
|
||||
@ -536,9 +525,7 @@ static void
|
||||
swapout(p)
|
||||
register struct proc *p;
|
||||
{
|
||||
vm_map_t map = &p->p_vmspace->vm_map;
|
||||
pmap_t pmap = &p->p_vmspace->vm_pmap;
|
||||
vm_offset_t ptaddr;
|
||||
int i;
|
||||
|
||||
#if defined(SWAP_DEBUG)
|
||||
|
||||
@ -61,7 +61,7 @@
|
||||
* any improvements or extensions that they make and grant Carnegie the
|
||||
* rights to redistribute these changes.
|
||||
*
|
||||
* $Id: vm_map.c,v 1.47 1996/05/23 00:45:54 dyson Exp $
|
||||
* $Id: vm_map.c,v 1.48 1996/05/29 05:12:21 dyson Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -89,6 +89,7 @@
|
||||
#include <vm/vm_kern.h>
|
||||
#include <vm/vm_pager.h>
|
||||
#include <vm/vm_extern.h>
|
||||
#include <vm/default_pager.h>
|
||||
|
||||
/*
|
||||
* Virtual memory maps provide for the mapping, protection,
|
||||
@ -217,8 +218,6 @@ vmspace_alloc(min, max, pageable)
|
||||
register struct vmspace *vm;
|
||||
|
||||
if (mapvmpgcnt == 0 && mapvm == 0) {
|
||||
int s;
|
||||
|
||||
mapvmpgcnt = (cnt.v_page_count * sizeof(struct vm_map_entry) + PAGE_SIZE - 1) / PAGE_SIZE;
|
||||
mapvm_start = mapvm = kmem_alloc_pageable(kernel_map,
|
||||
mapvmpgcnt * PAGE_SIZE);
|
||||
@ -1909,15 +1908,11 @@ vm_map_copy_entry(src_map, dst_map, src_entry, dst_entry)
|
||||
vm_map_t src_map, dst_map;
|
||||
register vm_map_entry_t src_entry, dst_entry;
|
||||
{
|
||||
vm_pindex_t temp_pindex;
|
||||
|
||||
if (src_entry->is_sub_map || dst_entry->is_sub_map)
|
||||
return;
|
||||
|
||||
if (src_entry->wired_count == 0) {
|
||||
|
||||
boolean_t src_needs_copy;
|
||||
|
||||
/*
|
||||
* If the source entry is marked needs_copy, it is already
|
||||
* write-protected.
|
||||
@ -2000,7 +1995,6 @@ vmspace_fork(vm1)
|
||||
vm_map_entry_t new_entry;
|
||||
pmap_t new_pmap;
|
||||
vm_object_t object;
|
||||
vm_page_t p;
|
||||
|
||||
vm_map_lock(old_map);
|
||||
|
||||
|
||||
@ -38,7 +38,7 @@
|
||||
* from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$
|
||||
*
|
||||
* @(#)vm_mmap.c 8.4 (Berkeley) 1/12/94
|
||||
* $Id: vm_mmap.c,v 1.42 1996/05/18 03:37:51 dyson Exp $
|
||||
* $Id: vm_mmap.c,v 1.43 1996/05/19 07:36:49 dyson Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -546,7 +546,7 @@ madvise(p, uap, retval)
|
||||
{
|
||||
vm_map_t map;
|
||||
pmap_t pmap;
|
||||
vm_offset_t start, end, addr, nextaddr;
|
||||
vm_offset_t start, end;
|
||||
/*
|
||||
* Check for illegal addresses. Watch out for address wrap... Note
|
||||
* that VM_*_ADDRESS are not constants due to casts (argh).
|
||||
|
||||
@ -61,7 +61,7 @@
|
||||
* any improvements or extensions that they make and grant Carnegie the
|
||||
* rights to redistribute these changes.
|
||||
*
|
||||
* $Id: vm_object.c,v 1.73 1996/05/23 00:45:58 dyson Exp $
|
||||
* $Id: vm_object.c,v 1.74 1996/05/24 05:17:21 dyson Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -263,7 +263,6 @@ vm_object_deallocate(object)
|
||||
vm_object_t object;
|
||||
{
|
||||
vm_object_t temp;
|
||||
vm_page_t p;
|
||||
|
||||
while (object != NULL) {
|
||||
|
||||
@ -510,6 +509,7 @@ vm_object_page_clean(object, start, end, syncio, lockflag)
|
||||
}
|
||||
splx(s);
|
||||
|
||||
s = splvm();
|
||||
maxf = 0;
|
||||
for(i=1;i<vm_pageout_page_count;i++) {
|
||||
if (tp = vm_page_lookup(object, pi + i)) {
|
||||
@ -576,6 +576,7 @@ vm_object_page_clean(object, start, end, syncio, lockflag)
|
||||
vm_page_protect(ma[index], VM_PROT_READ);
|
||||
}
|
||||
runlen = maxb + maxf + 1;
|
||||
splx(s);
|
||||
/*
|
||||
printf("maxb: %d, maxf: %d, runlen: %d, offset: %d\n", maxb, maxf, runlen, ma[0]->pindex);
|
||||
*/
|
||||
|
||||
@ -34,7 +34,7 @@
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* from: @(#)vm_page.c 7.4 (Berkeley) 5/7/91
|
||||
* $Id: vm_page.c,v 1.51 1996/05/18 03:37:57 dyson Exp $
|
||||
* $Id: vm_page.c,v 1.52 1996/05/24 05:20:15 dyson Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -588,6 +588,10 @@ vm_page_alloc(object, pindex, page_req)
|
||||
m = TAILQ_FIRST(&vm_page_queue_cache);
|
||||
if (m == NULL) {
|
||||
splx(s);
|
||||
#if defined(DIAGNOSTIC)
|
||||
if (cnt.v_cache_count > 0)
|
||||
printf("vm_page_alloc(NORMAL): missing pages on cache queue: %d\n", cnt.v_cache_count);
|
||||
#endif
|
||||
pagedaemon_wakeup();
|
||||
return (NULL);
|
||||
}
|
||||
@ -606,6 +610,10 @@ vm_page_alloc(object, pindex, page_req)
|
||||
m = TAILQ_FIRST(&vm_page_queue_cache);
|
||||
if (m == NULL) {
|
||||
splx(s);
|
||||
#if defined(DIAGNOSTIC)
|
||||
if (cnt.v_cache_count > 0)
|
||||
printf("vm_page_alloc(ZERO): missing pages on cache queue: %d\n", cnt.v_cache_count);
|
||||
#endif
|
||||
pagedaemon_wakeup();
|
||||
return (NULL);
|
||||
}
|
||||
@ -625,6 +633,10 @@ vm_page_alloc(object, pindex, page_req)
|
||||
m = TAILQ_FIRST(&vm_page_queue_cache);
|
||||
if (m == NULL) {
|
||||
splx(s);
|
||||
#if defined(DIAGNOSTIC)
|
||||
if (cnt.v_cache_count > 0)
|
||||
printf("vm_page_alloc(SYSTEM): missing pages on cache queue: %d\n", cnt.v_cache_count);
|
||||
#endif
|
||||
pagedaemon_wakeup();
|
||||
return (NULL);
|
||||
}
|
||||
@ -661,7 +673,6 @@ vm_page_alloc(object, pindex, page_req)
|
||||
m->flags = PG_BUSY;
|
||||
}
|
||||
m->wire_count = 0;
|
||||
m->act_count = 0;
|
||||
m->hold_count = 0;
|
||||
m->busy = 0;
|
||||
m->valid = 0;
|
||||
@ -708,8 +719,6 @@ vm_page_activate(m)
|
||||
vm_page_unqueue(m);
|
||||
|
||||
if (m->wire_count == 0) {
|
||||
if (m->act_count < 5)
|
||||
m->act_count = 5;
|
||||
TAILQ_INSERT_TAIL(&vm_page_queue_active, m, pageq);
|
||||
m->queue = PQ_ACTIVE;
|
||||
cnt.v_active_count++;
|
||||
@ -847,8 +856,6 @@ vm_page_unwire(m)
|
||||
cnt.v_wire_count--;
|
||||
TAILQ_INSERT_TAIL(&vm_page_queue_active, m, pageq);
|
||||
m->queue = PQ_ACTIVE;
|
||||
if (m->act_count < 5)
|
||||
m->act_count = 5;
|
||||
cnt.v_active_count++;
|
||||
}
|
||||
splx(s);
|
||||
@ -868,7 +875,7 @@ void
|
||||
vm_page_deactivate(m)
|
||||
register vm_page_t m;
|
||||
{
|
||||
int spl;
|
||||
int s;
|
||||
|
||||
/*
|
||||
* Only move active pages -- ignore locked or already inactive ones.
|
||||
@ -880,7 +887,7 @@ vm_page_deactivate(m)
|
||||
if (m->queue == PQ_INACTIVE)
|
||||
return;
|
||||
|
||||
spl = splvm();
|
||||
s = splvm();
|
||||
if (m->wire_count == 0 && m->hold_count == 0) {
|
||||
if (m->queue == PQ_CACHE)
|
||||
cnt.v_reactivated++;
|
||||
@ -889,7 +896,7 @@ vm_page_deactivate(m)
|
||||
m->queue = PQ_INACTIVE;
|
||||
cnt.v_inactive_count++;
|
||||
}
|
||||
splx(spl);
|
||||
splx(s);
|
||||
}
|
||||
|
||||
/*
|
||||
|
||||
@ -65,7 +65,7 @@
|
||||
* any improvements or extensions that they make and grant Carnegie the
|
||||
* rights to redistribute these changes.
|
||||
*
|
||||
* $Id: vm_pageout.c,v 1.74 1996/05/29 05:15:33 dyson Exp $
|
||||
* $Id: vm_pageout.c,v 1.75 1996/05/29 06:33:30 dyson Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
@ -104,6 +104,7 @@
|
||||
static void vm_pageout __P((void));
|
||||
static int vm_pageout_clean __P((vm_page_t, int));
|
||||
static int vm_pageout_scan __P((void));
|
||||
static int vm_pageout_free_page_calc __P((vm_size_t count));
|
||||
struct proc *pageproc;
|
||||
|
||||
static struct kproc_desc page_kp = {
|
||||
@ -170,7 +171,7 @@ vm_pageout_clean(m, sync)
|
||||
int sync;
|
||||
{
|
||||
register vm_object_t object;
|
||||
vm_page_t mc[2*VM_PAGEOUT_PAGE_COUNT];
|
||||
vm_page_t mc[2*vm_pageout_page_count];
|
||||
int pageout_count;
|
||||
int i, forward_okay, backward_okay, page_base;
|
||||
vm_pindex_t pindex = m->pindex;
|
||||
@ -182,7 +183,7 @@ vm_pageout_clean(m, sync)
|
||||
* Try to avoid the deadlock.
|
||||
*/
|
||||
if ((sync != VM_PAGEOUT_FORCE) &&
|
||||
(object->type != OBJT_SWAP) &&
|
||||
(object->type == OBJT_DEFAULT) &&
|
||||
((cnt.v_free_count + cnt.v_cache_count) < cnt.v_pageout_free_min))
|
||||
return 0;
|
||||
|
||||
@ -199,9 +200,9 @@ vm_pageout_clean(m, sync)
|
||||
if (!sync && object->backing_object) {
|
||||
vm_object_collapse(object);
|
||||
}
|
||||
mc[VM_PAGEOUT_PAGE_COUNT] = m;
|
||||
mc[vm_pageout_page_count] = m;
|
||||
pageout_count = 1;
|
||||
page_base = VM_PAGEOUT_PAGE_COUNT;
|
||||
page_base = vm_pageout_page_count;
|
||||
forward_okay = TRUE;
|
||||
if (pindex != 0)
|
||||
backward_okay = TRUE;
|
||||
@ -244,7 +245,7 @@ vm_pageout_clean(m, sync)
|
||||
(sync == VM_PAGEOUT_FORCE)) &&
|
||||
(p->wire_count == 0) &&
|
||||
(p->hold_count == 0)) {
|
||||
mc[VM_PAGEOUT_PAGE_COUNT + i] = p;
|
||||
mc[vm_pageout_page_count + i] = p;
|
||||
pageout_count++;
|
||||
if (pageout_count == vm_pageout_page_count)
|
||||
break;
|
||||
@ -278,7 +279,7 @@ vm_pageout_clean(m, sync)
|
||||
(sync == VM_PAGEOUT_FORCE)) &&
|
||||
(p->wire_count == 0) &&
|
||||
(p->hold_count == 0)) {
|
||||
mc[VM_PAGEOUT_PAGE_COUNT - i] = p;
|
||||
mc[vm_pageout_page_count - i] = p;
|
||||
pageout_count++;
|
||||
page_base--;
|
||||
if (pageout_count == vm_pageout_page_count)
|
||||
@ -524,8 +525,6 @@ vm_pageout_scan()
|
||||
vm_object_t object;
|
||||
int force_wakeup = 0;
|
||||
int vnodes_skipped = 0;
|
||||
int usagefloor;
|
||||
int i;
|
||||
int s;
|
||||
|
||||
|
||||
@ -538,11 +537,11 @@ vm_pageout_scan()
|
||||
*/
|
||||
|
||||
pages_freed = 0;
|
||||
addl_page_shortage = 0;
|
||||
|
||||
maxlaunder = (cnt.v_inactive_target > MAXLAUNDER) ?
|
||||
MAXLAUNDER : cnt.v_inactive_target;
|
||||
rescan0:
|
||||
addl_page_shortage = 0;
|
||||
maxscan = cnt.v_inactive_count;
|
||||
for( m = TAILQ_FIRST(&vm_page_queue_inactive);
|
||||
|
||||
@ -554,14 +553,17 @@ vm_pageout_scan()
|
||||
|
||||
cnt.v_pdpages++;
|
||||
|
||||
if (m->queue != PQ_INACTIVE)
|
||||
if (m->queue != PQ_INACTIVE) {
|
||||
goto rescan0;
|
||||
}
|
||||
|
||||
next = TAILQ_NEXT(m, pageq);
|
||||
|
||||
if (m->hold_count) {
|
||||
s = splvm();
|
||||
TAILQ_REMOVE(&vm_page_queue_inactive, m, pageq);
|
||||
TAILQ_INSERT_TAIL(&vm_page_queue_inactive, m, pageq);
|
||||
splx(s);
|
||||
addl_page_shortage++;
|
||||
continue;
|
||||
}
|
||||
@ -608,8 +610,10 @@ vm_pageout_scan()
|
||||
|
||||
object = m->object;
|
||||
if (object->flags & OBJ_DEAD) {
|
||||
s = splvm();
|
||||
TAILQ_REMOVE(&vm_page_queue_inactive, m, pageq);
|
||||
TAILQ_INSERT_TAIL(&vm_page_queue_inactive, m, pageq);
|
||||
splx(s);
|
||||
continue;
|
||||
}
|
||||
|
||||
@ -620,14 +624,20 @@ vm_pageout_scan()
|
||||
(m->hold_count == 0) &&
|
||||
(m->busy == 0) &&
|
||||
(m->flags & PG_BUSY) == 0) {
|
||||
s = splvm();
|
||||
TAILQ_REMOVE(&vm_page_queue_inactive, m, pageq);
|
||||
TAILQ_INSERT_TAIL(&vm_page_queue_inactive, m, pageq);
|
||||
splx(s);
|
||||
}
|
||||
if (object->flags & OBJ_MIGHTBEDIRTY)
|
||||
++vnodes_skipped;
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
* The page might have been moved to another queue
|
||||
* during potential blocking in vget() above.
|
||||
*/
|
||||
if (m->queue != PQ_INACTIVE) {
|
||||
if (object->flags & OBJ_MIGHTBEDIRTY)
|
||||
++vnodes_skipped;
|
||||
@ -635,16 +645,24 @@ vm_pageout_scan()
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
* The page may have been busied during the blocking in
|
||||
* vput(); We don't move the page back onto the end of
|
||||
* the queue so that statistics are more correct if we don't.
|
||||
*/
|
||||
if (m->busy || (m->flags & PG_BUSY)) {
|
||||
TAILQ_REMOVE(&vm_page_queue_inactive, m, pageq);
|
||||
TAILQ_INSERT_TAIL(&vm_page_queue_inactive, m, pageq);
|
||||
vput(vp);
|
||||
continue;
|
||||
}
|
||||
|
||||
/*
|
||||
* If the page has become held, then skip it
|
||||
*/
|
||||
if (m->hold_count) {
|
||||
s = splvm();
|
||||
TAILQ_REMOVE(&vm_page_queue_inactive, m, pageq);
|
||||
TAILQ_INSERT_TAIL(&vm_page_queue_inactive, m, pageq);
|
||||
splx(s);
|
||||
if (object->flags & OBJ_MIGHTBEDIRTY)
|
||||
++vnodes_skipped;
|
||||
vput(vp);
|
||||
@ -689,9 +707,23 @@ vm_pageout_scan()
|
||||
}
|
||||
|
||||
pcount = cnt.v_active_count;
|
||||
s = splvm();
|
||||
m = TAILQ_FIRST(&vm_page_queue_active);
|
||||
while ((m != NULL) && (pcount-- > 0) && (page_shortage > 0)) {
|
||||
|
||||
if (m->queue != PQ_ACTIVE) {
|
||||
#if defined(DIAGNOSTIC)
|
||||
printf("vm_pageout_scan: page not on active queue: %d, pindex: 0x%x, flags: 0x%x, ",
|
||||
m->queue, m->pindex, m->flags);
|
||||
if (m->object == kmem_object)
|
||||
printf("kmem object\n");
|
||||
else if (m->object == kernel_object)
|
||||
printf("kernel object\n");
|
||||
else
|
||||
printf("object type: %d\n", m->object->type);
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
|
||||
next = TAILQ_NEXT(m, pageq);
|
||||
|
||||
/*
|
||||
@ -700,8 +732,10 @@ vm_pageout_scan()
|
||||
if ((m->busy != 0) ||
|
||||
(m->flags & PG_BUSY) ||
|
||||
(m->hold_count != 0)) {
|
||||
s = splvm();
|
||||
TAILQ_REMOVE(&vm_page_queue_active, m, pageq);
|
||||
TAILQ_INSERT_TAIL(&vm_page_queue_active, m, pageq);
|
||||
splx(s);
|
||||
m = next;
|
||||
continue;
|
||||
}
|
||||
@ -722,8 +756,10 @@ vm_pageout_scan()
|
||||
if ( (m->object->ref_count != 0) &&
|
||||
(m->flags & PG_REFERENCED) ) {
|
||||
m->flags &= ~PG_REFERENCED;
|
||||
s = splvm();
|
||||
TAILQ_REMOVE(&vm_page_queue_active, m, pageq);
|
||||
TAILQ_INSERT_TAIL(&vm_page_queue_active, m, pageq);
|
||||
splx(s);
|
||||
} else {
|
||||
m->flags &= ~PG_REFERENCED;
|
||||
if (page_shortage > 0) {
|
||||
@ -740,8 +776,8 @@ vm_pageout_scan()
|
||||
}
|
||||
m = next;
|
||||
}
|
||||
splx(s);
|
||||
|
||||
|
||||
s = splvm();
|
||||
/*
|
||||
* We try to maintain some *really* free pages, this allows interrupt
|
||||
* code to be guaranteed space.
|
||||
@ -753,6 +789,7 @@ vm_pageout_scan()
|
||||
vm_page_free(m);
|
||||
cnt.v_dfree++;
|
||||
}
|
||||
splx(s);
|
||||
|
||||
/*
|
||||
* If we didn't get enough free pages, and we have skipped a vnode
|
||||
@ -838,14 +875,16 @@ vm_size_t count;
|
||||
cnt.v_free_min = 4 + (cnt.v_page_count - 1024) / 200;
|
||||
else
|
||||
cnt.v_free_min = 4;
|
||||
cnt.v_pageout_free_min = 2 + VM_PAGEOUT_PAGE_COUNT
|
||||
+ cnt.v_interrupt_free_min;
|
||||
cnt.v_free_reserved = 4 + cnt.v_pageout_free_min + (count / 768);
|
||||
cnt.v_pageout_free_min = (2*MAXBSIZE)/PAGE_SIZE +
|
||||
cnt.v_interrupt_free_min;
|
||||
cnt.v_free_reserved = vm_pageout_page_count +
|
||||
cnt.v_pageout_free_min + (count / 768);
|
||||
cnt.v_free_min += cnt.v_free_reserved;
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
#ifdef unused
|
||||
int
|
||||
vm_pageout_free_pages(object, add)
|
||||
vm_object_t object;
|
||||
@ -853,6 +892,7 @@ int add;
|
||||
{
|
||||
return vm_pageout_free_page_calc(object->size);
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* vm_pageout is the high level pageout daemon.
|
||||
@ -867,6 +907,8 @@ vm_pageout()
|
||||
*/
|
||||
|
||||
cnt.v_interrupt_free_min = 2;
|
||||
if (cnt.v_page_count < 2000)
|
||||
vm_pageout_page_count = 8;
|
||||
|
||||
vm_pageout_free_page_calc(cnt.v_page_count);
|
||||
/*
|
||||
|
||||
Loading…
Reference in New Issue
Block a user