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vm_page_wire(9) [debian man page]

VM_PAGE_WIRE(9) 					   BSD Kernel Developer's Manual					   VM_PAGE_WIRE(9)

NAME
vm_page_wire, vm_page_unwire -- wire and unwire pages SYNOPSIS
#include <sys/param.h> #include <vm/vm.h> #include <vm/vm_page.h> void vm_page_wire(vm_page_t m); void vm_page_unwire(vm_page_t m, int activate); DESCRIPTION
The vm_page_wire() function increments the wire count on a page, and removes it from whatever queue it is on. The vm_page_unwire() function releases one of the wirings on the page. When write_count reaches zero the page is placed back onto either the active queue (if activate is non-zero) or onto the inactive queue (if activate is zero). If the page is unmanaged (PG_UNMANAGED is set) then the page is left on PQ_NONE. AUTHORS
This manual page was written by Chad David <davidc@acns.ab.ca>. BSD
July 13, 2001 BSD

Check Out this Related Man Page

VM_PAGE_HOLD(9) 					   BSD Kernel Developer's Manual					   VM_PAGE_HOLD(9)

NAME
vm_page_hold, vm_page_unhold -- update a page's hold count SYNOPSIS
#include <sys/param.h> #include <vm/vm.h> #include <vm/vm_page.h> void vm_page_hold(vm_page_t m); void vm_page_unhold(vm_page_t m); DESCRIPTION
The vm_page_hold() function increases the hold count on a page. This prevents the page daemon from freeing the page. vm_page_hold() should only be used for very temporary wiring of a page, as that page will not be considered for paging or reallocation for as long as its hold count is greater than zero. Also note that while wired pages are removed from whatever queue they are on, vm_page_hold() does not affect the location of the page. If it is on a queue prior to the call, it will still be there afterward. If the page needs to be held for a long period of time, vm_page_wire(9) should be used. vm_page_unhold() function reduces the hold count on a page. If the hold count is zero it is possible that the page will be freed by the page daemon. SEE ALSO
vm_page_unwire(9), vm_page_wire(9) AUTHORS
This manual page was written by Chad David <davidc@acns.ab.ca>. BSD
July 13, 2001 BSD

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