1/*
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1994 John S. Dyson
5 * All rights reserved.
6 * Copyright (c) 1994 David Greenman
7 * All rights reserved.
8 *

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61 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
62 * School of Computer Science
63 * Carnegie Mellon University
64 * Pittsburgh PA 15213-3890
65 *
66 * any improvements or extensions that they make and grant Carnegie the
67 * rights to redistribute these changes.
68 *
69 * $FreeBSD: head/sys/vm/vm_fault.c 98304 2002-06-16 20:42:29Z alc $
70 */
71
72/*
73 * Page fault handling module.
74 */
75#include <sys/param.h>
76#include <sys/systm.h>
77#include <sys/kernel.h>

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306 }
307
308 /*
309 * See if page is resident
310 */
311 fs.m = vm_page_lookup(fs.object, fs.pindex);
312 if (fs.m != NULL) {
313 int queue, s;
314 /*
315 * Wait/Retry if the page is busy. We have to do this
316 * if the page is busy via either PG_BUSY or
317 * vm_page_t->busy because the vm_pager may be using
318 * vm_page_t->busy for pageouts ( and even pageins if
319 * it is the vnode pager ), and we could end up trying
320 * to pagein and pageout the same page simultaneously.
321 *

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