long migrate_pages(int pid, unsigned long maxnode,
const unsigned long *old_nodes,
const unsigned long *new_nodes);
Link with -lnuma.
migrate_pages() moves all pages of the process pid that are in memory
nodes old_nodes to the memory nodes in new_nodes. Pages not located in
any node in old_nodes will not be migrated. As far as possible, the
kernel maintains the relative topology relationship inside old_nodes
during the migration to new_nodes.
The old_nodes and new_nodes arguments are pointers to bit masks of node
numbers, with up to maxnode bits in each mask. These masks are main-
tained as arrays of unsigned long integers (in the last long integer,
the bits beyond those specified by maxnode are ignored). The maxnode
argument is the maximum node number in the bit mask plus one (this is
the same as in mbind(2), but different from select(2)).
The pid argument is the ID of the process whose pages are to be moved.
To move pages in another process, the caller must be privileged
(CAP_SYS_NICE) 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 pid
is 0, then migrate_pages() moves pages of the calling process.
Pages shared with another process will only be moved if the initiating
process has the CAP_SYS_NICE privilege.
On success migrate_pages() returns zero. On error, it returns -1, and
sets errno to indicate the error.
EPERM Insufficient privilege (CAP_SYS_NICE) to move pages of the
process specified by pid, or insufficient privilege
(CAP_SYS_NICE) to access the specified target nodes.
ESRCH No process matching pid could be found.
The migrate_pages() system call first appeared on Linux in version
This system call is Linux-specific.
For information on library support, see numa(7).
installing libnuma-devel or a similar package.
get_mempolicy(2), mbind(2), set_mempolicy(2), numa(3), numa_maps(5),
cpuset(7), numa(7), migratepages(8), numa_stat(8);
the kernel source file Documentation/vm/page_migration.
This page is part of release 3.35 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://man7.org/linux/man-pages/.
Linux 2010-11-01 MIGRATE_PAGES(2)
Man Pages Copyright Respective Owners. Site Copyright (C) 1994 - 2017
All Rights Reserved.