d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Don't go below the low water mark of free pages due to optional prefaulting

Browse Source 
of pages.
PR:		2431
This commit is contained in:
tegge 1998-09-06 23:04:20 +00:00
parent e20ec13750
commit 73bcd22039
2 changed files with 20 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
sys/amd64/amd64/pmap.c
View File

@ -39,7 +39,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.207 1998/08/23 10:16:25 bde Exp $
* $Id: pmap.c,v 1.208 1998/09/04 13:10:34 ache Exp $
*/
/*
@ -2717,6 +2717,15 @@ pmap_copy(dst_pmap, src_pmap, dst_addr, len, src_addr)
panic("pmap_copy: invalid to pmap_copy page tables\n");
#endif
/*
* Don't let optional prefaulting of pages make us go
* way below the low water mark of free pages or way
* above high water mark of used pv entries.
*/
if (cnt.v_free_count < cnt.v_free_reserved ||
pv_entry_count > pv_entry_high_water)
break;
pdnxt = ((addr + PAGE_SIZE*NPTEPG) & ~(PAGE_SIZE*NPTEPG - 1));
ptepindex = addr >> PDRSHIFT;

11
sys/i386/i386/pmap.c
View File

@ -39,7 +39,7 @@
* SUCH DAMAGE.
*
* from: @(#)pmap.c 7.7 (Berkeley) 5/12/91
* $Id: pmap.c,v 1.207 1998/08/23 10:16:25 bde Exp $
* $Id: pmap.c,v 1.208 1998/09/04 13:10:34 ache Exp $
*/
/*
@ -2717,6 +2717,15 @@ pmap_copy(dst_pmap, src_pmap, dst_addr, len, src_addr)
panic("pmap_copy: invalid to pmap_copy page tables\n");
#endif
/*
* Don't let optional prefaulting of pages make us go
* way below the low water mark of free pages or way
* above high water mark of used pv entries.
*/
if (cnt.v_free_count < cnt.v_free_reserved ||
pv_entry_count > pv_entry_high_water)
break;
pdnxt = ((addr + PAGE_SIZE*NPTEPG) & ~(PAGE_SIZE*NPTEPG - 1));
ptepindex = addr >> PDRSHIFT;