diff options
Diffstat (limited to 'sys/vm/vm_page.h')
| -rw-r--r-- | sys/vm/vm_page.h | 40 |
1 files changed, 26 insertions, 14 deletions
diff --git a/sys/vm/vm_page.h b/sys/vm/vm_page.h index 33ada305990b..5a3be88adf23 100644 --- a/sys/vm/vm_page.h +++ b/sys/vm/vm_page.h @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * from: @(#)vm_page.h 7.3 (Berkeley) 4/21/91 - * $Id: vm_page.h,v 1.8 1994/01/31 04:21:19 davidg Exp $ + * $Id: vm_page.h,v 1.14 1994/04/14 07:50:24 davidg Exp $ */ /* @@ -71,6 +71,9 @@ #ifndef _VM_PAGE_ #define _VM_PAGE_ +#ifdef KERNEL +#include <systm.h> +#endif /* * Management of resident (logical) pages. * @@ -121,18 +124,14 @@ struct vm_page { unsigned int wire_count; /* how many wired down maps use me? */ unsigned short flags; /* bit encoded flags */ - unsigned short deact; /* deactivation count */ + unsigned short act_count; /* active count */ + int hold_count; /* page hold count -- don't pageout */ vm_offset_t phys_addr; /* physical address of page */ }; typedef struct vm_page *vm_page_t; -#define DEACT_START 5 -#define DEACT_DELAY 2 -#define DEACT_CLEAN 1 -#define DEACT_FREE 0 - #if VM_PAGE_DEBUG #define VM_PAGE_CHECK(mem) { \ if ((((unsigned int) mem) < ((unsigned int) &vm_page_array[0])) || \ @@ -226,10 +225,10 @@ void vm_page_replace(); boolean_t vm_page_zero_fill(); void vm_page_copy(); - +#if 0 void vm_page_wire(); void vm_page_unwire(); - +#endif /* * Functions implemented as macros @@ -272,12 +271,25 @@ extern vm_offset_t pmap_phys_ddress(int); /* - * these macros are *MUCH* faster on a 386/486 type machine - * eventually they need to be implemented correctly and put - * somewhere in the machine dependant stuff. + * Keep page from being freed by the page daemon + * much of the same effect as wiring, except much lower + * overhead and should be used only for *very* temporary + * holding ("wiring"). */ -#define vm_disable_intr() (disable_intr(), 0) -#define vm_set_intr(spl) enable_intr() +static inline void +vm_page_hold(mem) + vm_page_t mem; +{ + mem->hold_count++; +} + +static inline void +vm_page_unhold(mem) + vm_page_t mem; +{ + if( --mem->hold_count < 0) + panic("vm_page_unhold: hold count < 0!!!"); +} #endif /* KERNEL */ #endif /* _VM_PAGE_ */ |