VM_PAGE_BUSY(9) MidnightBSD Kernel Developer’s Manual VM_PAGE_BUSY(9)

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 PG_BUSY flag in the page.

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

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

SEE ALSO

vm_page_sleep_busy(9), wakeup(9)

AUTHORS

This manual page was written by Chad David 〈davidc@acns.ab.ca〉.

MidnightBSD 0.3 July 14, 2001 MidnightBSD 0.3