NAME

       vm_page_busy, vm_page_flash, vm_page_wakeup — handle the busying and unbusying of a page

SYNOPSIS

       #include <sys/param.h>
       #include <vm/vm.h>
       #include <vm/vm_page.h>

       void
       vm_page_busy(vm_page_t m);

       void
       vm_page_flash(vm_page_t m);

       void
       vm_page_wakeup(vm_page_t m);

DESCRIPTION

       These functions handle the busying, unbusying and notification of the unbusying of a page.

       vm_page_busy() sets the VPO_BUSY flag in the page.

       vm_page_flash()  checks  to  see if there is anybody waiting on the page (VPO_WANTED will be set), and if
       so, clears the VPO_WANTED flag and notifies whoever is waiting via wakeup().

       vm_page_wakeup() clears the VPO_BUSY flag on the page, and calls vm_page_flash()  in  case  somebody  has
       been waiting for it.

SEE ALSO

       vm_page_sleep_if_busy(9), wakeup(9)

AUTHORS

       This manual page was written by Chad David <davidc@acns.ab.ca>.

Debian                                            July 14, 2001                                  VM_PAGE_BUSY(9)