migratepages(8) — Linux manual page


MIGRATEPAGES(8)         Linux Administrator's Manual         MIGRATEPAGES(8)

NAME         top

       migratepages - Migrate the physical location a processes pages

SYNOPSIS         top

       migratepages pid from-nodes to-nodes

DESCRIPTION         top

       migratepages moves the physical location of a processes pages without
       any changes of the virtual address space of the process. Moving the
       pages allows one to change the distances of a process to its memory.
       Performance may be optimized by moving a processes pages to the node
       where it is executing.

       If multiple nodes are specified for from-nodes or to-nodes then an
       attempt is made to preserve the relative location of each page in
       each nodeset.

       For example if we move from nodes 2-5 to 7,9,12-13 then the preferred
       mode of operation is to move pages from 2->7, 3->9, 4->12 and 5->13.
       However, this is only posssible if enough memory is available.

       Valid node specifiers

              all                 All nodes
              number              Node number
              number1{,number2}   Node number1 and Node number2
              number1-number2     Nodes from number1 to number2
              ! nodes             Invert selection of the following specification.

NOTES         top

       Requires an NUMA policy aware kernel with support for page migration
       (linux 2.6.16 and later).

       migratepages will only move pages that are not shared with other
       processes if called by a user without administrative priviledges (but
       with the right to modify the process).

       migratepages will move all pages if invoked from root (or a user with
       administrative priviledges).

FILES         top

       /proc/<pid>/numa_maps for information about the NUMA memory use of a

COPYRIGHT         top

       Copyright 2005-2006 Christoph Lameter, Silicon Graphics, Inc.
       migratepages is under the GNU General Public License, v.2

SEE ALSO         top

       numactl(8) , set_mempolicy(2) , get_mempolicy(2) , mbind(2) ,
       sched_setaffinity(2) , sched_getaffinity(2) , proc(5) , ftok(3) ,
       shmat(2) , taskset(1)

COLOPHON         top

       This page is part of the numactl (NUMA commands) project.
       Information about the project can be found at 
       ⟨http://oss.sgi.com/projects/libnuma/⟩.  If you have a bug report for
       this manual page, send it to linux-numa@vger.kernel.org.  This page
       was obtained from the project's upstream Git repository
       ⟨https://github.com/numactl/numactl.git⟩ on 2020-09-18.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2020-09-17.)  If you discover any rendering problems in
       this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not part
       of the original manual page), send a mail to man-pages@man7.org

SGI                               Jan 2005                   MIGRATEPAGES(8)

Pages that refer to this page: migrate_pages(2)move_pages(2)cpuset(7)numactl(8)