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- wheezy 8.2-1
|VM_PAGE_IO_START(9)||Kernel Developer's Manual||VM_PAGE_IO_START(9)|
NAME¶vm_page_io_start, vm_page_io_finish — ready or unready a page for I/O
#include <vm/vm_page.h> void
vm_page_io_start(vm_page_t m); void
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
VPO_WANTED. A page is typically marked
VPO_WANTEDby a thread to register its interest in the page to either complete I/O or becoming available for general use.
AUTHORS¶This manual page was written by Chad David ⟨firstname.lastname@example.org⟩ and Alfred Perlstein ⟨alfred@FreeBSD.org⟩.
|July 17, 2001||Debian|