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PMAP_PAGE_EXISTS_QUICK (9) | Kernel routines | Unix Manual Pages | :man

NAME

pmap_page_exists_quick - determine if a page exists in a physical map

CONTENTS

Synopsis
Description
Implementation Notes
Return Values
See Also
Authors

SYNOPSIS


.In sys/param.h
.In vm/vm.h
.In vm/pmap.h boolean_t pmap_page_exists_quick "pmap_t pmap" "vm_page_t m"

DESCRIPTION

The pmap_page_exists_quick function is used to quickly determine if the page m exists in the physical map pmap. It is typically called from the VM paging code.

IMPLEMENTATION NOTES

The PV count used above may be changed upwards or downwards in future; it is only necessary that TRUE be returned for a small subset of pmaps for proper page aging.

RETURN VALUES

The pmap_page_exists_quick returns TRUE only if the PV entry for the physical map pmap is one of the first 16 PVs linked from the page m.

SEE ALSO

pmap(9)

AUTHORS


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