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VM_PAGE_IO_START (9) | Kernel routines | Unix Manual Pages | :man

NAME

vm_page_io_start, vm_page_io_finish - "ready or unready a page for I/O"

CONTENTS

Synopsis
Description
Authors

SYNOPSIS


.In sys/param.h
.In vm/vm.h
.In vm/vm_page.h void vm_page_io_start "vm_page_t m" void vm_page_io_finish "vm_page_t m"

DESCRIPTION

The vm_page_io_start function prepares the page for I/O by incrementing its busy flag by one.

The vm_page_io_finish function lowers the busy count on the page by one, if the resulting busy count is zero, a wakeup(9) will be issued if the page has been marked PG_WANTED. A page is typically marked PG_WANTED by a thread to register its interest in the page to either complete I/O or becoming available for general use.

AUTHORS


.An -nosplit This manual page was written by
.An Chad David Aq
davidc@acns.ab.ca and
.An Alfred Perlstein Aq alfred@FreeBSD.org .

July 17, 2001 VM_PAGE_IO_START (9)
shtml">manServer 1.07 from vm_page_io.9 using doc macros.


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