.\" Copyright 1998 Andries E. Brouwer (aeb@cwi.nl)
.\"
.\" May be distributed under the GNU General Public License
.\" Rewritten for 2.1.117, aeb, 981010.
.\"
.\" Japanese Version Copyright (c) 1999 NAKANO Takeo all rights reserved.
.\" Japanese Version Copyright (c) 1997 NAKANO Takeo all rights reserved.
.\" Translated Thu Aug 28 1997 by NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\" Updated & Modified Thu 7 Oct 1999 by NAKANO Takeo 
.\" Updated & Modified Sat 18 Mar 2000 by NAKANO Takeo
.\" Updated & Modified Wed 14 Jun 2000 by NAKANO Takeo 
.\" Updated & Modified Wed May  5 00:29:28 JST 2004
.\"         by Yuichi SATO <ysato444@yahoo.co.jp>
.\" Updated & Modified Sat May  7 00:44:04 JST 2005 by Yuichi SATO
.\"
.TH MKSWAP 8 "25 March 1999" "Linux 2.2.4" "Linux Programmer's Manual"
.SH ̾
mkswap \- Linux Υåΰ
.SH 
.BI "mkswap [\-c] [\-v" N "] [\-f] [\-p " PSZ "] [\-L " label "] " device  " [" size "]"
.SH 
.B mkswap
 Linux ΥåΰǥХޤϥե˽롣

(åΰˤΰѤ򳫻Ϥˤϡ
.B swapon
ޥɤѤɬפ롣̾凉åΰ
.I /etc/fstab
˥ꥹȤ졢ưץȤ˵ҤƤ
.B swapon \-a
ޥɤˤäơưѤǤ褦ˤʤäƤ롣)


.I device
̾ϥǥѡƥ
.RI ( /dev/hda4

.I /dev/sdb7
Τ褦ʤ) Ǥ뤬եꤹ뤳ȤǤ롣
Linux ͥϥѡƥ ID 򻲾Ȥʤ
󥹥ȡ륹ץȤ¿Ǥϡѡƥ
16 ʤ 82 (LINUX_SWAP) ȤʤäƤΤ򥹥åץѡƥ
ȤߤʤƤ롣
(ٹ: Solaris ⤳ηȤ
Solaris Υѡƥ˲ʤ褦դ뤳ȡ)

.I size
ѥ᡼פǤ뤬ȤθߴΤ˻ĤƤ롣
(åΰˤ 1024 Хȥ֥åñ̤ǻꤹ롣
Υѥ᡼άȡ
.B mkswap
ϥѡƥΤѤ롣
Υѥ᡼ϻꤷʤۤץߥ򤹤
ǥƤޤ)

.I PSZ
ϡѤڡꤹ롣
ۤȤɤξϻꤷʤƤ褤 (ȤꤹΤϸʤ) 
Ť libc ΤСϥڡְͤ㤨֤Ȥꡢ
.B mkswap
ư򤪤ƤޤȤ롣ȼɾȤơ
.B swapon
 "no swap signature is found" ȤäƼԤ롣
.I PSZ
Ϳ̾ͤ 4096 ޤ 8192 Ǥ롣

Linux ϥåΰȤ 2 Ĥηǧ롣Ťȿ
ȤǤ롣ϡåΰƬڡ 10 ХȤ
äƶ̤롣ŤǤ `SWAP_SPACE'Ǥ
`SWAPSPACE2' 줾쥵Ȥʤ롣

ŤǤϡƬڡλĤʬϥӥåȥޥåפǤꡢ
1 ӥåȤåΰѤǤ뤽줾Υڡб롣
ƬΥڡϤΥӥåȥޥåפݻΤǡƬӥåȤ 0 Ǥ롣
ޤǸ 10 ХȤϥˤʤäƤ롣äƥڡ
S ȤСŤΥåΰϺ
8*(S-10)-1 ڡ򥹥åפѤ뤳ȤǤ롣
S=4096 (i386 ) ʤСѤǤΰκͤ
133890048 Х (ۤ 128 MiB) Ǥꡢ
Ĥʬ̵̤Ȥʤ롣 alpha  sparc64 Ǥ S=8192 ʤΤǡͤ
535560992 Х (ۤ 512 MiB) Ȥʤ롣

ŤǤϡΥӥåȥޥåץڡʬ̵̤ˤƤ뤳Ȥˤʤ롣
ʤʤޥåΥӥå 0 ϡɥ֥ååΰζˤ
֥å򼨤ΤΤǤ롣åΰΥϴñʷ׻
ǵޤͤ¤뤫ꡢɥ֥åХꥹȤΤñ
ʤäƤ롣ɥ֥å󤢤褦ΰ򥹥åפ
ͤʤï⤤ʤ (ɮԤ 1 Ĥɥ֥åǤ
ʤ)
ΥåΰǤϡϤäȤ٤Ƥ롣
ѤǤ륹åΰκͤϡߤǤϥƥ¸Ǥ롣
i386, PPC, m68k, ARM Ǥ 2GiB sparc Ǥ 1GiB
mips Ǥ 512MiB, alpha Ǥ 128GiB, sparc64 Ǥ 3TiB Ǥ롣

2.1.117 ΥͥǤϡ 1 ڡ 1 ХȤƤƤ
ߤǤ 2 ХȤƤƤ롣ä 2 GiB 
åΰˤ 2 MiB Υ꤬ͥɬפȤʤ롣

Ǥϡ Linux  32 ĤΥåΰĤȤǤ
(Linux 2.4.10  8 ĤǤä)
ѤƤΰ
.I /proc/swaps
եǸ뤳ȤǤ (2.1.25 ʹ)

.B mkswap
Ǥ 10 ڡ꾮ΰ뤳ȤϤǤʤ

ȤäƤޥΥڡ狼ʤϡ"cat /proc/cpuinfo"
ˤäĴ٤뤳ȤǤ뤫⤷ʤ
(Ǥʤ⤷ʤ - ΥեƤϥƥ
ͥΥС˰¸ƤΤǡ)

åץեϡ
.B mkswap
ˤԤˡեƤɬפ롣
ŪˤϡʲΤ褦ʥޥɤѤɤ:

.nf
.RS
# dd if=/dev/zero of=swapfile bs=1024 count=65536
.RE
.fi

åץեˤ "hole" (̤ݤΰ) ¸ߤƤϤʤʤȤ
դ (äƥեݤ
.BR cp (1)
ȤäƤϤʤʤ)

.SH ץ
.TP
.B \-c
åΰˡǥХФɥ֥åΥåԤ
ɥ֥åĤäϡΥȿɽ롣
.TP
.B \-f
롣ϼʥޥɤǤ¹Ԥ롣
ꤹȡեޤϥѡƥμºݤ礭
礭ʥåץեưǤƤޤ
SPARC ǤϥåΰŪ˺롣
Υץդʤȡ
.B mkswap
 SPARC Υѡ֥åäǥХˤ
v0 Υåפʤѡƥơ֥
äƤޤǽ뤫Ǥ롣
.TP
.BI "\-p " PSZ
Ѥڡꤹ롣
.TP
.BI "\-L " label
٥ꤷΥ٥ swapon Ǥ褦ˤ롣
(ΥåΰΤߡ)
.TP
.B \-v0
ŤΥåΰ롣
.TP
.B \-v1
Υåΰ롣

.LP
\-v ץά
.B mkswap
¹Ԥȡ
ǥեȤǤϿ롣Υͥ뤬
2.1.117 Ť (뤤 PAGE_SIZE  2048 꾮) ˤϡ
ŤǺ롣
ΥإåϡǽΥ֥åˤϽ񤭹ޤʤ
äƥ֡ȥǥ٥֤ˤϤ餬˾ޤ
2.0  2.2 ΥͥξѤɬפϡ
åΰݤˤ \-v0 ץѤ뤳ȡ

.SH Ϣ
.BR fdisk (8),
.BR swapon (8)