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.\" Copyright 2009 Intel Corporation
.\"                Author: Andi Kleen
.\" Based on the move_pages manpage which was
.\" This manpage is Copyright (C) 2006 Silicon Graphics, Inc.
.\"                               Christoph Lameter
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.TH MIGRATE_PAGES 2 2010\-11\-01 Linux "Linux Programmer's Manual"
.SH 名前
migrate_pages \- move all pages in a process to another set of nodes
.SH 書式
.nf
\fB#include <numaif.h>\fP
.sp
\fBlong migrate_pages(int \fP\fIpid\fP\fB, unsigned long \fP\fImaxnode,\fP
\fB                   const unsigned long *\fP\fIold_nodes,\fP
\fB                   const unsigned long *\fP\fInew_nodes);\fP
.fi
.sp
\fI\-lnuma\fP とリンクする。
.SH 説明
\fBmigrate_pages\fP()  moves all pages of the process \fIpid\fP that are in memory
nodes \fIold_nodes\fP to the memory nodes in \fInew_nodes\fP.  Pages not located
in any node in \fIold_nodes\fP will not be migrated.  As far as possible, the
kernel maintains the relative topology relationship inside \fIold_nodes\fP
during the migration to \fInew_nodes\fP.

The \fIold_nodes\fP and \fInew_nodes\fP arguments are pointers to bit masks of
node numbers, with up to \fImaxnode\fP bits in each mask.  These masks are
maintained as arrays of unsigned \fIlong\fP integers (in the last \fIlong\fP
integer, the bits beyond those specified by \fImaxnode\fP are ignored).  The
\fImaxnode\fP argument is the maximum node number in the bit mask plus one
(this is the same as in \fBmbind\fP(2), but different from \fBselect\fP(2)).

The \fIpid\fP argument is the ID of the process whose pages are to be moved.
To move pages in another process, the caller must be privileged
(\fBCAP_SYS_NICE\fP)  or the real or effective user ID of the calling process
must match the real or saved\-set user ID of the target process.  If \fIpid\fP
is 0, then \fBmigrate_pages\fP()  moves pages of the calling process.

Pages shared with another process will only be moved if the initiating
process has the \fBCAP_SYS_NICE\fP privilege.
.SH 返り値
On success \fBmigrate_pages\fP()  returns zero.  On error, it returns \-1, and
sets \fIerrno\fP to indicate the error.
.SH エラー
.TP 
\fBEPERM\fP
Insufficient privilege (\fBCAP_SYS_NICE\fP)  to move pages of the process
specified by \fIpid\fP, or insufficient privilege (\fBCAP_SYS_NICE\fP)  to access
the specified target nodes.
.TP 
\fBESRCH\fP
.\" FIXME There are other errors
No process matching \fIpid\fP could be found.
.SH バージョン
The \fBmigrate_pages\fP()  system call first appeared on Linux in version
2.6.16.
.SH 準拠
このシステムコールは Linux 固有である。
.SH 注意
ライブラリによるサポートについては \fBnuma\fP(7)  を参照。

Use \fBget_mempolicy\fP(2)  with the \fBMPOL_F_MEMS_ALLOWED\fP flag to obtain the
set of nodes that are allowed by the calling process's cpuset.  Note that
this information is subject to change at any time by manual or automatic
reconfiguration of the cpuset.

Use of \fBmigrate_pages\fP()  may result in pages whose location (node)
violates the memory policy established for the specified addresses (see
\fBmbind\fP(2))  and/or the specified process (see \fBset_mempolicy\fP(2)).  That
is, memory policy does not constrain the destination nodes used by
\fBmigrate_pages\fP().

ヘッダファイル \fI<numaif.h>\fP は glibc には含まれておらず、 \fIlibnuma\-devel\fP
か同様のパッケージをインストールする必要がある。
.SH 関連項目
\fBget_mempolicy\fP(2), \fBmbind\fP(2), \fBset_mempolicy\fP(2), \fBnuma\fP(3),
\fBnuma_maps\fP(5), \fBcpuset\fP(7), \fBnuma\fP(7), \fBmigratepages\fP(8),
\fBnuma_stat\fP(8);
.br
the kernel source file \fIDocumentation/vm/page_migration\fP.
.SH この文書について
この man ページは Linux \fIman\-pages\fP プロジェクトのリリース 3.40 の一部
である。プロジェクトの説明とバグ報告に関する情報は
http://www.kernel.org/doc/man\-pages/ に書かれている。