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Length: 1799 (0x707)
Types: TextFile
Notes: UNIX file
Names: »getpages.h«
└─⟦a6ab2eb36⟧ Bits:30004042/kconfig3.imd SW95705I 386/ix Multi-user Release 1.2
└─⟦a6ab2eb36⟧ UNIX Filesystem
└─⟦this⟧ »kc/new/usr/include/sys/getpages.h«
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
#ident "@(#)getpages.h 1.3"
/* The following list is used to keep track of regions locked
** by getpages.
*/
typedef struct {
reg_t *gpr_rgptr; /* Pointer to the region. */
int gpr_count; /* Number of pages from this */
/* region in spglist and */
/* fpglist. */
} gprgl_t;
extern gprgl_t gprglst[];
extern int gprgndx;
/* The following structure is used to maintain a list of
* pages to be stolen by getpages.
*/
typedef struct {
pde_t *gp_ptptr; /* Ptr to page table entry. */
gprgl_t *gp_rlptr; /* Ptr to region list entry. */
} pglst_t;
/* The following define sets the maximum size chunk which
* getpages can swap out at once. The tuneable parameter
* tune.t_maxsc can never be made larger than this value.
*/
#define MAXSPGLST 100
/* The following list is used to accumulate pages which we
** wish to steal but which must be written to swap first.
*/
extern pglst_t spglst[];
extern int spglndx;
/* The following list is used to accumulate pages which we
** wish to steal and which have a current copy on swap or
** a file and thus do not require any I/O to be done before
** they can be stolen. The reason for accummulating them
** in a list instead of free each page as it is found is
** to reduce the number of ATB purges required.
*/
#define MAXFPGLST 100
extern pglst_t fpglst[];
extern int fpglndx;
/* The following word is used to lock the getpages tables
** described above so that vhand and sched can't both
** use them at the same time.
*/
extern int pglstlock;
extern int pglstlk();
extern int pglstunlk();