uvm_pdpolicy.h revision 1.7 
1/*	$NetBSD: uvm_pdpolicy.h,v 1.7 2020/02/23 15:46:43 ad Exp $	*/
2
3/*-
4 * Copyright (c)2005, 2006 YAMAMOTO Takashi,
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef _UVM_PDPOLICY_H_
30#define _UVM_PDPOLICY_H_
31
32struct vm_page;
33struct vm_anon;
34
35/*
36 * these API is for uvm internal use only.
37 * don't use them directly from outside of /sys/uvm.
38 */
39
40void uvmpdpol_idle(struct uvm_cpu *);
41void uvmpdpol_init(void);
42void uvmpdpol_init_cpu(struct uvm_cpu *);
43void uvmpdpol_reinit(void);
44void uvmpdpol_estimatepageable(int *, int *);
45bool uvmpdpol_needsscan_p(void);
46
47void uvmpdpol_pageactivate(struct vm_page *);
48void uvmpdpol_pagedeactivate(struct vm_page *);
49void uvmpdpol_pagedequeue(struct vm_page *);
50void uvmpdpol_pageenqueue(struct vm_page *);
51bool uvmpdpol_pageisqueued_p(struct vm_page *);
52void uvmpdpol_pagerealize(struct vm_page *);
53void uvmpdpol_anfree(struct vm_anon *);
54
55void uvmpdpol_tune(void);
56void uvmpdpol_scaninit(void);
57void uvmpdpol_scanfini(void);
58struct vm_page *uvmpdpol_selectvictim(krwlock_t **lock);
59void uvmpdpol_balancequeue(int);
60
61void uvmpdpol_sysctlsetup(void);
62
63/*
64 * uvmpdpol_set_intent: set an intended state for the page, taking care not
65 * to overwrite any of the other flags.
66 */
67
68static inline void
69uvmpdpol_set_intent(struct vm_page *pg, uint32_t i)
70{
71
72	KASSERT(mutex_owned(&pg->interlock));
73	pg->pqflags = PQ_INTENT_SET | (pg->pqflags & ~PQ_INTENT_MASK) | i;
74}
75
76#endif /* !_UVM_PDPOLICY_H_ */
77