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Changed buffer allocation policy (machdep.c)
Moved various pmap 'bit' test/set functions back into real functions; gcc generates better code at the expense of more of it. (pmap.c) Fixed a deadlock problem with pv entry allocations (pmap.c) Added a new, optional function 'pmap_prefault' that does clustered page table preloading (pmap.c) Changed the way that page tables are held onto (trap.c). Submitted by: John Dyson
This commit is contained in:
David Greenman
parent
0a1c0d9ae8
commit
fbdfe8ac22
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=5837
@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
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* $Id: machdep.c,v 1.101 1995/01/14 13:20:08 bde Exp $
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* $Id: machdep.c,v 1.102 1995/01/17 01:15:12 bde Exp $
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*/
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#include "npx.h"
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@ -114,7 +114,7 @@ char cpu_model[sizeof("Cy486DLC") + 1];
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/*
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* Declare these as initialized data so we can patch them.
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*/
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int nswbuf = 128;
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int nswbuf = 0;
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#ifdef NBUF
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int nbuf = NBUF;
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#else
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@ -255,9 +255,12 @@ cpu_startup()
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valloc(msqids, struct msqid_ds, msginfo.msgmni);
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#endif
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if (nbuf == 0)
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nbuf = min(physmem / 30, 256);
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nswbuf = nbuf;
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if (nbuf == 0) {
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nbuf = 32;
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if( physmem > 1024)
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nbuf += min((physmem - 1024) / 20, 1024);
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}
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nswbuf = min(nbuf, 128);
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valloc(swbuf, struct buf, nswbuf);
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valloc(buf, struct buf, nbuf);
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File diff suppressed because it is too large
Load Diff
@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)trap.c 7.4 (Berkeley) 5/13/91
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* $Id: trap.c,v 1.43 1995/01/09 16:04:39 davidg Exp $
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* $Id: trap.c,v 1.44 1995/01/14 13:20:10 bde Exp $
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*/
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/*
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@ -460,23 +460,12 @@ trap_pfault(frame, usermode)
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/* Fault the pte only if needed: */
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*(volatile char *)v += 0;
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ptepg = (vm_page_t) pmap_pte_vm_page(vm_map_pmap(map), v);
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vm_page_hold(ptepg);
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pmap_use_pt( vm_map_pmap(map), va);
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/* Fault in the user page: */
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rv = vm_fault(map, va, ftype, FALSE);
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vm_page_unhold(ptepg);
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/*
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* page table pages don't need to be kept if they
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* are not held
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*/
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if( ptepg->hold_count == 0 && ptepg->wire_count == 0) {
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pmap_page_protect( VM_PAGE_TO_PHYS(ptepg),
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VM_PROT_NONE);
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vm_page_free(ptepg);
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}
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pmap_unuse_pt( vm_map_pmap(map), va);
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--p->p_lock;
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} else {
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@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)machdep.c 7.4 (Berkeley) 6/3/91
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* $Id: machdep.c,v 1.101 1995/01/14 13:20:08 bde Exp $
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* $Id: machdep.c,v 1.102 1995/01/17 01:15:12 bde Exp $
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*/
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#include "npx.h"
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@ -114,7 +114,7 @@ char cpu_model[sizeof("Cy486DLC") + 1];
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/*
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* Declare these as initialized data so we can patch them.
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*/
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int nswbuf = 128;
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int nswbuf = 0;
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#ifdef NBUF
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int nbuf = NBUF;
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#else
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@ -255,9 +255,12 @@ cpu_startup()
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valloc(msqids, struct msqid_ds, msginfo.msgmni);
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#endif
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if (nbuf == 0)
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nbuf = min(physmem / 30, 256);
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nswbuf = nbuf;
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if (nbuf == 0) {
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nbuf = 32;
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if( physmem > 1024)
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nbuf += min((physmem - 1024) / 20, 1024);
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}
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nswbuf = min(nbuf, 128);
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valloc(swbuf, struct buf, nswbuf);
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valloc(buf, struct buf, nbuf);
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File diff suppressed because it is too large
Load Diff
@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)trap.c 7.4 (Berkeley) 5/13/91
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* $Id: trap.c,v 1.43 1995/01/09 16:04:39 davidg Exp $
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* $Id: trap.c,v 1.44 1995/01/14 13:20:10 bde Exp $
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*/
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/*
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@ -460,23 +460,12 @@ trap_pfault(frame, usermode)
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/* Fault the pte only if needed: */
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*(volatile char *)v += 0;
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ptepg = (vm_page_t) pmap_pte_vm_page(vm_map_pmap(map), v);
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vm_page_hold(ptepg);
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pmap_use_pt( vm_map_pmap(map), va);
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/* Fault in the user page: */
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rv = vm_fault(map, va, ftype, FALSE);
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vm_page_unhold(ptepg);
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/*
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* page table pages don't need to be kept if they
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* are not held
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*/
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if( ptepg->hold_count == 0 && ptepg->wire_count == 0) {
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pmap_page_protect( VM_PAGE_TO_PHYS(ptepg),
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VM_PROT_NONE);
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vm_page_free(ptepg);
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}
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pmap_unuse_pt( vm_map_pmap(map), va);
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--p->p_lock;
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} else {
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@ -35,7 +35,7 @@
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* SUCH DAMAGE.
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*
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* from: @(#)trap.c 7.4 (Berkeley) 5/13/91
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* $Id: trap.c,v 1.43 1995/01/09 16:04:39 davidg Exp $
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* $Id: trap.c,v 1.44 1995/01/14 13:20:10 bde Exp $
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*/
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/*
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@ -460,23 +460,12 @@ trap_pfault(frame, usermode)
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/* Fault the pte only if needed: */
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*(volatile char *)v += 0;
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ptepg = (vm_page_t) pmap_pte_vm_page(vm_map_pmap(map), v);
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vm_page_hold(ptepg);
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pmap_use_pt( vm_map_pmap(map), va);
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/* Fault in the user page: */
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rv = vm_fault(map, va, ftype, FALSE);
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vm_page_unhold(ptepg);
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/*
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* page table pages don't need to be kept if they
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* are not held
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*/
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if( ptepg->hold_count == 0 && ptepg->wire_count == 0) {
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pmap_page_protect( VM_PAGE_TO_PHYS(ptepg),
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VM_PROT_NONE);
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vm_page_free(ptepg);
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}
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pmap_unuse_pt( vm_map_pmap(map), va);
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--p->p_lock;
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} else {
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