Provided by: freebsd-manpages_8.2-1_all
vm_page_busy, vm_page_flash, vm_page_wakeup — handle the busying and unbusying of a page
#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);
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.
This manual page was written by Chad David <firstname.lastname@example.org>.