1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright (C) Markus Kuhn, 1996
.\"
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
.\"
.\" The GNU General Public License's references to "object code"
.\" and "executables" are to be interpreted as the output of any
.\" document formatting or typesetting system, including
.\" intermediate and printed output.
.\"
.\" This manual is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
.\" GNU General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public
.\" License along with this manual; if not, write to the Free
.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
.\" USA.
.\"
.\" 1995-11-26 Markus Kuhn <mskuhn@cip.informatik.uni-erlangen.de>
.\" First version written
.\" 2003-07-09 Michael Kerrisk <mtk16@ext.canterbury.ac.nz>
.\" Added note on suspend mode on laptops
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\" all rights reserved.
.\" Translated Sun Feb 23 16:26:13 JST 1997
.\" by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated Sun Oct 12 JST 2003 by Kentaro Shirakata <argrath@ub32.org>
.\"
.\"WORD: memory
.\"WORD: paging ڡ
.\"WORD: lock å
.\"WORD: unlock å
.\"WORD: real-time ꥢ롦
.\"WORD: algorithm 르ꥺ
.\"WORD: security ƥ
.\"WORD: scheduling 塼
.\"WORD: password ѥ
.\"WORD: secret key ̩
.\"WORD: previlege ø
.\"WORD: super user ѡ桼
.\"
.TH MLOCK 2 1995-11-26 "Linux 1.3.43" "Linux Programmer's Manual"
.SH ̾
mlock \- ΰΥڡػߤ
.SH
.nf
.B #include <sys/mman.h>
.sp
\fBint mlock(const void *\fIaddr\fB, size_t \fIlen\fB);
.fi
.SH
.B mlock
.I addr
ϤޤĹ
.I len
ХȤϰϤΥΥڡ(paging)ػߤ롣
.B mlock
ƥࡦ뤬ˤϡ
ꤵ줿ϰϤΥΰޤह٤ƤΥڡ
RAM ˻Ĥ³뤳Ȥݾڤ롣
.B munlock
.B munlockall
ˤäƥڡå뤫
.B munmap
ˤäƥڡޥåפ뤫
ץλ뤫
.B exec
ˤä̤ΥץϤ뤫ޤ RAM ˻Ĥ뤳Ȥݾڤ롣
.B fork
Ԥʤä˻ҥץϥڡΥåѾʤ
ΥåˤϼĤλȤƻ롣ꥢ롦(real-time)
르ꥺȹ⤤ƥɬפʥǡǤ롣ꥢ롦
ץꥱϷŪʥߥ䥹塼ᤷ
ڡͽʤץμ¹٤⤿餹פװǤ롣
ꥢ롦ΥץꥱϤƤ
.B sched_setscheduler
ǥꥢ롦ࡦ顼ѹ롣
Ź䥻ƥΥեȥϤФХѥɤ̩Υǡ
褦ʽפʥǡڡη̡̩
åѤθΤž뤫⤷ʤƤϥƥ
եȥ RAM ̩ƽλäȸˤǤŨˤä
ǽˤʤ뤫⤷ʤ
(åץȥåפȤĤΥǥȥåץԥ塼
ڥɥ⡼ɤϥƥ RAM ƤΥå˴ؤ餺
ǥ¸뤳Ȥա)
Υå(lock)Ѥʤ
ʤʣ
.B mlock
.B mlockall
ƤӽФƥå줿ڡǤ⡢
бϰϤФ
.B munlock
1 ƤӽФ
.B munlockall
ƤӽФꤹǥå롣
ʣξʣΥץ˥ޥåפƤڡϡʤȤĤξꡢ
ĤΥץǥåƤ¤ RAM ˻Ĥ³롣
.B mlock
.B munlock
ѲǽǤ POSIX ƥǤ
.B _POSIX_MEMLOCK_RANGE
<unistd.h> Ƥꡢ<limits.h> ˤ
.B PAGESIZE
ͤϥڡΥХȿƤ롣
.SH
Linux ΥƥࡦǤϡ
.I addr
ϼưŪüڤΤƤˤֶᤤڡؤȹ碌롣
POSIX 1003.1-2001
.I addr
ڡƤ뤳Ȥ᤹Ƥ롣
ΤܿտޤץꥱǤϤȶ˹碌ɤ
.SH ֤
ϡ
.B mlock
ϥ֤顼ξ \-1 ֤졢
.I errno
Ŭڤꤵ졢ץΥɥ쥹֤ˤåѹʤ
.SH 顼
.TP
.B ENOMEM
ꤵ줿ɥ쥹ϰϤץΥɥ쥹֤˥ޥåפ줿ڡ
פʤ¤ĶΥڡå褦Ȥ
.TP
.B EPERM
ƤӽФץɬפøͭƤʤä
ѡ桼ΥץΤߤ
ڡå뤳ȤǤ롣
.TP
.B EINVAL
.I len
οǤʤ
.SH
POSIX.1b, SVr4. SVr4 ˤ¾ EAGAIN 顼ˤĤƤεҤ롣
.SH Ϣ
.BR mlockall (2),
.BR munlock (2),
.BR munlockall (2),
.BR munmap (2),
.BR setrlimit (2)
|
