1MIGRATEPAGES(8) Linux Administrator's Manual MIGRATEPAGES(8)
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6 migratepages - Migrate the physical location a processes pages
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9 migratepages pid from-nodes to-nodes
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12 migratepages moves the physical location of a processes pages without
13 any changes of the virtual address space of the process. Moving the
14 pages allows one to change the distances of a process to its memory.
15 Performance may be optimized by moving a processes pages to the node
16 where it is executing.
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18 If multiple nodes are specified for from-nodes or to-nodes then an
19 attempt is made to preserve the relative location of each page in each
20 nodeset.
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22 For example if we move from nodes 2-5 to 7,9,12-13 then the preferred
23 mode of operation is to move pages from 2->7, 3->9, 4->12 and 5->13.
24 However, this is only posssible if enough memory is available.
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26 Valid node specifiers
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28 all All nodes
29 number Node number
30 number1{,number2} Node number1 and Node number2
31 number1-number2 Nodes from number1 to number2
32 ! nodes Invert selection of the following specification.
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35 Requires an NUMA policy aware kernel with support for page migration
36 (linux 2.6.16 and later).
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38 migratepages will only move pages that are not shared with other pro‐
39 cesses if called by a user without administrative priviledges (but with
40 the right to modify the process).
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42 migratepages will move all pages if invoked from root (or a user with
43 administrative priviledges).
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47 /proc/<pid>/numa_maps for information about the NUMA memory use of a
48 process.
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51 Copyright 2005-2006 Christoph Lameter, Silicon Graphics, Inc.
52 migratepages is under the GNU General Public License, v.2
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56 numactl(8) , set_mempolicy(2) , get_mempolicy(2) , mbind(2) ,
57 sched_setaffinity(2) , sched_getaffinity(2) , proc(5) , ftok(3) ,
58 shmat(2) , taskset(1)
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63SGI Jan 2005 MIGRATEPAGES(8)