phys_pager.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/proc.h>
#include <sys/mutex.h>
#include <sys/mman.h>
#include <sys/rwlock.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pageout.h>
#include <vm/vm_pager.h>

Include dependency graph for phys_pager.c:

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Macros
#define	PHYSCLUSTER   1024
#define	PHYSALLOC   16

Functions
	__FBSDID ("$FreeBSD$")
static int	default_phys_pager_getpages (vm_object_t object, vm_page_t *m, int count, int *rbehind, int *rahead)
static int	default_phys_pager_populate (vm_object_t object, vm_pindex_t pidx, int fault_type, vm_prot_t max_prot, vm_pindex_t *first, vm_pindex_t *last)
static boolean_t	default_phys_pager_haspage (vm_object_t object, vm_pindex_t pindex, int *before, int *after)
static void	phys_pager_init (void)
vm_object_t	phys_pager_allocate (void *handle, const struct phys_pager_ops *ops, void *data, vm_ooffset_t size, vm_prot_t prot, vm_ooffset_t foff, struct ucred *cred)
static vm_object_t	phys_pager_alloc (void *handle, vm_ooffset_t size, vm_prot_t prot, vm_ooffset_t foff, struct ucred *ucred)
static void	phys_pager_dealloc (vm_object_t object)
static int	phys_pager_getpages (vm_object_t object, vm_page_t *m, int count, int *rbehind, int *rahead)
	SYSCTL_INT (_vm, OID_AUTO, phys_pager_cluster, CTLFLAG_RWTUN, &phys_pager_cluster, 0, "prefault window size for phys pager")
static int	phys_pager_populate (vm_object_t object, vm_pindex_t pidx, int fault_type, vm_prot_t max_prot, vm_pindex_t *first, vm_pindex_t *last)
static void	phys_pager_putpages (vm_object_t object, vm_page_t *m, int count, boolean_t sync, int *rtvals)
static boolean_t	phys_pager_haspage (vm_object_t object, vm_pindex_t pindex, int *before, int *after)

Variables
static struct pagerlst	phys_pager_object_list
static struct mtx	phys_pager_mtx
const struct phys_pager_ops	default_phys_pg_ops
static int	phys_pager_cluster = PHYSCLUSTER
const struct pagerops	physpagerops

Macro Definition Documentation

PHYSALLOC

#define PHYSALLOC   16

Definition at line 229 of file phys_pager.c.

PHYSCLUSTER

#define PHYSCLUSTER   1024

Definition at line 216 of file phys_pager.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

default_phys_pager_getpages()

static int default_phys_pager_getpages ( vm_object_t  object, vm_page_t *  m, int  count, int *  rbehind, int *  rahead  )

static

Definition at line 177 of file phys_pager.c.

References PG_ZERO, pmap_zero_page(), vm_page_all_valid(), vm_page_none_valid(), vm_page_valid(), and VM_PAGER_OK.

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default_phys_pager_haspage()

static boolean_t default_phys_pager_haspage ( vm_object_t  object, vm_pindex_t  pindex, int *  before, int *  after  )

static

Definition at line 280 of file phys_pager.c.

References phys_pager_cluster.

default_phys_pager_populate()

static int default_phys_pager_populate ( vm_object_t  object, vm_pindex_t  pidx, int fault_type  __unused, vm_prot_t max_prot  __unused, vm_pindex_t *  first, vm_pindex_t *  last  )

static

Definition at line 232 of file phys_pager.c.

References phys_pager_cluster, PHYSALLOC, vm_object::size, VM_ALLOC_COUNT, VM_ALLOC_NORMAL, vm_page_all_valid(), vm_page_grab(), vm_page_zero_invalid(), and VM_PAGER_OK.

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phys_pager_alloc()

static vm_object_t phys_pager_alloc ( void *  handle, vm_ooffset_t  size, vm_prot_t  prot, vm_ooffset_t  foff, struct ucred *  ucred  )

static

Definition at line 149 of file phys_pager.c.

References default_phys_pg_ops, and phys_pager_allocate().

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phys_pager_allocate()

vm_object_t phys_pager_allocate	(	void *	handle,
		const struct phys_pager_ops *	ops,
		void *	data,
		vm_ooffset_t	size,
		vm_prot_t	prot,
		vm_ooffset_t	foff,
		struct ucred *	cred
	)

Definition at line 78 of file phys_pager.c.

References vm_object::handle, OBJ_POPULATE, OBJT_PHYS, OFF_TO_IDX, phys_pager_mtx, phys_pager_object_list, phys_pager_ops::phys_pg_ctor, phys_pager_ops::phys_pg_populate, vm_object::size, vm_object_allocate(), vm_object_deallocate(), vm_object_set_flag(), and vm_pager_object_lookup().

Referenced by phys_pager_alloc().

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phys_pager_dealloc()

static void phys_pager_dealloc ( vm_object_t  object )

static

Definition at line 157 of file phys_pager.c.

References vm_object::handle, OBJT_DEAD, vm_object::ops, vm_object::phys, phys_pager_mtx, phys_pager_object_list, vm_object::un_pager, VM_OBJECT_WLOCK, and VM_OBJECT_WUNLOCK.

phys_pager_getpages()

static int phys_pager_getpages ( vm_object_t  object, vm_page_t *  m, int  count, int *  rbehind, int *  rahead  )

static

Definition at line 201 of file phys_pager.c.

References vm_object::ops, vm_object::phys, and vm_object::un_pager.

phys_pager_haspage()

static boolean_t phys_pager_haspage ( vm_object_t  object, vm_pindex_t  pindex, int *  before, int *  after  )

static

Definition at line 295 of file phys_pager.c.

References vm_object::ops, vm_object::phys, and vm_object::un_pager.

phys_pager_init()

static void phys_pager_init ( void  )

static

Definition at line 70 of file phys_pager.c.

References phys_pager_mtx, and phys_pager_object_list.

phys_pager_populate()

static int phys_pager_populate ( vm_object_t  object, vm_pindex_t  pidx, int  fault_type, vm_prot_t  max_prot, vm_pindex_t *  first, vm_pindex_t *  last  )

static

Definition at line 264 of file phys_pager.c.

References vm_object::ops, vm_object::phys, and vm_object::un_pager.

phys_pager_putpages()

static void phys_pager_putpages ( vm_object_t  object, vm_page_t *  m, int  count, boolean_t  sync, int *  rtvals  )

static

Definition at line 272 of file phys_pager.c.

SYSCTL_INT()

SYSCTL_INT	(	_vm	,
		OID_AUTO	,
		phys_pager_cluster	,
		CTLFLAG_RWTUN	,
		&	phys_pager_cluster,
		0	,
		"prefault window size for phys pager"
	)

Variable Documentation

default_phys_pg_ops

const struct phys_pager_ops default_phys_pg_ops

Initial value:

= {
        .phys_pg_getpages = default_phys_pager_getpages,
        .phys_pg_populate = default_phys_pager_populate,
        .phys_pg_haspage = default_phys_pager_haspage,
        .phys_pg_ctor = NULL,
        .phys_pg_dtor = NULL,
}

Definition at line 61 of file phys_pager.c.

Referenced by phys_pager_alloc(), and vm_object_init().

phys_pager_cluster

int phys_pager_cluster = PHYSCLUSTER

static

Definition at line 218 of file phys_pager.c.

Referenced by default_phys_pager_haspage(), and default_phys_pager_populate().

phys_pager_mtx

struct mtx phys_pager_mtx

static

Definition at line 53 of file phys_pager.c.

Referenced by phys_pager_allocate(), phys_pager_dealloc(), and phys_pager_init().

phys_pager_object_list

struct pagerlst phys_pager_object_list

static

Definition at line 51 of file phys_pager.c.

Referenced by phys_pager_allocate(), phys_pager_dealloc(), and phys_pager_init().

physpagerops

const struct pagerops physpagerops

Initial value:

= {
        .pgo_kvme_type = KVME_TYPE_PHYS,
        .pgo_init =     phys_pager_init,
        .pgo_alloc =    phys_pager_alloc,
        .pgo_dealloc =  phys_pager_dealloc,
        .pgo_getpages = phys_pager_getpages,
        .pgo_putpages = phys_pager_putpages,
        .pgo_haspage =  phys_pager_haspage,
        .pgo_populate = phys_pager_populate,
}

Definition at line 302 of file phys_pager.c.