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vm_page_busy (9)

>> vm_page_busy (9) ( FreeBSD man: Ядро )

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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.

AUTHORS

This manual page was written by An Chad David Aq davidc@acns.ab.ca .

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