node0 and node1 is DRAM node, node3 is a PMEM node.
$ cat /sys/devices/system/node/node1/numastat
numa_hit 646590
numa_miss 3963
numa_foreign 30651
interleave_hit 416
local_node 645252
other_node 5301
demote_src 200478
demote_dst 0
Of cousre, the userspace numastat will be extened to support these 2
new fields in the future like:
$ numastat
node0 node1 node3
numa_hit 741793 702460 364154
numa_miss 1759 8104 28893
numa_foreign 8105 30651 0
interleave_hit 653 416 0
local_node 741762 701115 0
other_node 1790 9449 393047
demote_src 163612 203828 0
demote_dst 0 0 367440
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
drivers/base/node.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 27e8502548a7..d3fc70599b6a 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -496,20 +496,32 @@ static DEVICE_ATTR(meminfo, 0444, node_read_meminfo, NULL);
static ssize_t node_read_numastat(struct device *dev,
struct device_attribute *attr, char *buf)
{
+ struct pglist_data *pgdat = NODE_DATA(dev->id);
+ unsigned long demote_src, demote_dst;
+
fold_vm_numa_events();
+ demote_src = node_page_state_pages(pgdat, PGDEMOTE_SRC_KSWAPD) +
+ node_page_state_pages(pgdat, PGDEMOTE_SRC_DIRECT) +
+ node_page_state_pages(pgdat, PGDEMOTE_SRC_KHUGEPAGED);
+ demote_dst = node_page_state_pages(pgdat, PGDEMOTE_DST_KSWAPD) +
+ node_page_state_pages(pgdat, PGDEMOTE_DST_DIRECT) +
+ node_page_state_pages(pgdat, PGDEMOTE_DST_KHUGEPAGED);
return sysfs_emit(buf,
"numa_hit %lu\n"
"numa_miss %lu\n"
"numa_foreign %lu\n"
"interleave_hit %lu\n"
"local_node %lu\n"
- "other_node %lu\n",
+ "other_node %lu\n"
+ "demote_src %lu\n"
+ "demote_dst %lu\n",
sum_zone_numa_event_state(dev->id, NUMA_HIT),
sum_zone_numa_event_state(dev->id, NUMA_MISS),
sum_zone_numa_event_state(dev->id, NUMA_FOREIGN),
sum_zone_numa_event_state(dev->id, NUMA_INTERLEAVE_HIT),
sum_zone_numa_event_state(dev->id, NUMA_LOCAL),
- sum_zone_numa_event_state(dev->id, NUMA_OTHER));
+ sum_zone_numa_event_state(dev->id, NUMA_OTHER),
+ demote_src, demote_dst);
}
static DEVICE_ATTR(numastat, 0444, node_read_numastat, NULL);
--
2.29.2
