I use numactl(--localalloc) tool run a test case, but it shows that the numa policy is prefer, I don't know why. [root@localhost test]# numactl --hard available: 2 nodes (0-1) node 0 cpus: 0 1 2 3 4 5 12 13 14 15 16 17 node 0 size: 32739 MB node 0 free: 29134 MB node 1 cpus: 6 7 8 9 10 11 18 19 20 21 22 23 node 1 size: 32768 MB node 1 free: 31682 MB node distances: node 0 1 0: 10 20 1: 20 10 [root@localhost test]# numactl --localalloc --physcpubind=22 ./test.exe [root@localhost linux-3.10-redhat]# ps -ef| grep test root 18532 13994 1 05:24 pts/0 00:00:00 ./test.exe root 18534 14037 0 05:24 pts/1 00:00:00 grep --color=auto test [root@localhost linux-3.10-redhat]# cat /proc/18532/numa_maps 00400000 prefer:0 file=/home/qiuxishi/test/test.exe mapped=1 N0=1 00600000 prefer:0 file=/home/qiuxishi/test/test.exe anon=1 dirty=1 N1=1 00601000 prefer:0 file=/home/qiuxishi/test/test.exe anon=1 dirty=1 N1=1 7f1a15b9b000 prefer:0 file=/usr/lib64/libc-2.17.so mapped=51 mapmax=44 N0=49 N1=2 7f1a15d51000 prefer:0 file=/usr/lib64/libc-2.17.so 7f1a15f51000 prefer:0 file=/usr/lib64/libc-2.17.so anon=4 dirty=4 N1=4 7f1a15f55000 prefer:0 file=/usr/lib64/libc-2.17.so anon=2 dirty=2 N1=2 7f1a15f57000 prefer:0 anon=3 dirty=3 N1=3 7f1a15f5c000 prefer:0 file=/usr/lib64/ld-2.17.so mapped=28 mapmax=15 N0=23 N1=5 7f1a16166000 prefer:0 anon=3 dirty=3 N1=3 7f1a1617c000 prefer:0 anon=1 dirty=1 N1=1 7f1a1617d000 prefer:0 file=/usr/lib64/ld-2.17.so anon=1 dirty=1 N1=1 7f1a1617e000 prefer:0 file=/usr/lib64/ld-2.17.so anon=1 dirty=1 N1=1 7f1a1617f000 prefer:0 anon=1 dirty=1 N1=1 7ffd0d2ed000 prefer:0 stack anon=3 dirty=3 N1=3 7ffd0d3fc000 prefer:0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>