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7cd10a60c3
In arch ia64, has following definition: extern u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES]; #define node_distance(from,to) (numa_slit[(from) * num_online_nodes() + (to)]) num_online_nodes() is a variable value, it can be changed after hot-remove/add a node. In my practice, I found node distance is wrong after offline a node in IA64 platform. For example system has 4 nodes: node distances: node 0 1 2 3 0: 10 21 21 32 1: 21 10 32 21 2: 21 32 10 21 3: 32 21 21 10 linux-drf:/sys/devices/system/node/node0 # cat distance 10 21 21 32 linux-drf:/sys/devices/system/node/node1 # cat distance 21 10 32 21 After offline node2: linux-drf:/sys/devices/system/node/node0 # cat distance 10 21 32 linux-drf:/sys/devices/system/node/node1 # cat distance 32 21 32 --------->expected value is: 21 10 21 Signed-off-by: Jianguo Wu <wujianguo@huawei.com> Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Tony Luck <tony.luck@intel.com> |
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