FreeBSD manual
download PDF document: vm_page_dontneed.9.pdf
VM_PAGE_DONTNEED(9) FreeBSD Kernel Developer's Manual VM_PAGE_DONTNEED(9)
NAME
vm_page_dontneed - indicate that a page is not needed anymore
SYNOPSIS
#include <sys/param.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
void
vm_page_dontneed(vm_page_t m);
DESCRIPTION
The vm_page_dontneed() function advises the VM system that the given page
is no longer required. If the page is already in the inactive queue or
in the cache queue, this function does nothing; otherwise the page is
deactivated.
Note that vm_page_dontneed() does not necessarily deactivate a page, but
instead implements an algorithm that attempts to prevent small objects
from having their pages reused too quickly, and large objects from
flushing smaller ones from the queues as their pages are released.
SEE ALSO
vm_page_deactivate(9)
AUTHORS
This manual page was written by Chad David <davidc@acns.ab.ca>.
FreeBSD 14.0-RELEASE-p6 July 30, 2001 FreeBSD 14.0-RELEASE-p6