Differential D12663 Diff 34171 head/sys/vm/vm_swapout_dummy.c

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head/sys/vm/vm_swapout_dummy.c

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svn:keywords	null	FreeBSD=%H \ No newline at end of property

				/*-
				* Copyright (c) 1991 Regents of the University of California.
				* All rights reserved.
				* Copyright (c) 1994 John S. Dyson
				* All rights reserved.
				* Copyright (c) 1994 David Greenman
				* All rights reserved.
				* Copyright (c) 2005 Yahoo! Technologies Norway AS
				* All rights reserved.
				*
				* This code is derived from software contributed to Berkeley by
				* The Mach Operating System project at Carnegie-Mellon University.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				* 3. All advertising materials mentioning features or use of this software
				* must display the following acknowledgement:
				* This product includes software developed by the University of
				* California, Berkeley and its contributors.
				* 4. Neither the name of the University nor the names of its contributors
				* may be used to endorse or promote products derived from this software
				* without specific prior written permission.
				*
				* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*
				* from: @(#)vm_pageout.c 7.4 (Berkeley) 5/7/91
				*
				*
				* Copyright (c) 1987, 1990 Carnegie-Mellon University.
				* All rights reserved.
				*
				* Authors: Avadis Tevanian, Jr., Michael Wayne Young
				*
				* Permission to use, copy, modify and distribute this software and
				* its documentation is hereby granted, provided that both the copyright
				* notice and this permission notice appear in all copies of the
				* software, derivative works or modified versions, and any portions
				* thereof, and that both notices appear in supporting documentation.
				*
				* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
				* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
				* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
				*
				* Carnegie Mellon requests users of this software to return to
				*
				* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
				* School of Computer Science
				* Carnegie Mellon University
				* Pittsburgh PA 15213-3890
				*
				* any improvements or extensions that they make and grant Carnegie the
				* rights to redistribute these changes.
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <sys/param.h>
				#include <sys/systm.h>
				#include <sys/kernel.h>
				#include <sys/lock.h>
				#include <sys/mutex.h>
				#include <sys/proc.h>
				#include <sys/sysctl.h>
				#include <sys/vmmeter.h>

				#include <vm/vm.h>
				#include <vm/vm_param.h>
				#include <vm/vm_pageout.h>

				static int vm_swap_enabled = 0;
				SYSCTL_INT(_vm, VM_SWAPPING_ENABLED, swap_enabled, CTLFLAG_RD,
				&vm_swap_enabled, 0,
				"Enable entire process swapout");

				static int vm_swap_idle_enabled = 0;
				SYSCTL_INT(_vm, OID_AUTO, swap_idle_enabled, CTLFLAG_RD,
				&vm_swap_idle_enabled, 0,
				"Allow swapout on idle criteria");

				void
				vm_swapout_run(void)
				{
				}

				void
				vm_swapout_run_idle(void)
				{
				}

				void
				faultin(struct proc *p)
				{

				PROC_LOCK_ASSERT(p, MA_OWNED);
				if ((p->p_flag & P_INMEM) == 0)
				panic("faultin: proc %p swapped out with NO_SWAPPING", p);
				}

				void
				swapper(void)
				{

				for (;;)
				tsleep(&proc0, PVM, "swapin", MAXSLP * hz);
				}