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  • LINUX man pages
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    The following form allows you to view linux man pages.

    Command:

    migratepages

    
    
    

    SYNOPSIS

           migratepages pid from-nodes to-nodes
    
    
    

    DESCRIPTION

           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

           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  pro-
           cesses 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

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

    COPYRIGHT

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

    SEE ALSO

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