[PATCH v5 19/36] proc: include N_MEMORY_PRIVATE nodes in numa_maps output

[Gregory Price]

numa_maps collects per-node page counts in the page-table walkers
and emits them in show_numa_map.  All three filtered by N_MEMORY,
so pages on N_MEMORY_PRIVATE nodes were never gathered/printed.

Accept N_MEMORY_PRIVATE pages in both walkers and emit private nodes
in show_numa_map, so private-node mappings are visible in numa_maps.

Signed-off-by: Gregory Price <gourry@xxxxxxxxxx>
---
 fs/proc/task_mmu.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 817e3e0f91943..e116cd5f157b9 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -3389,7 +3389,8 @@ static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma,
 		return NULL;
 
 	nid = page_to_nid(page);
-	if (!node_isset(nid, node_states[N_MEMORY]))
+	if (!node_isset(nid, node_states[N_MEMORY]) &&
+	    !node_isset(nid, node_states[N_MEMORY_PRIVATE]))
 		return NULL;
 
 	return page;
@@ -3414,7 +3415,8 @@ static struct page *can_gather_numa_stats_pmd(pmd_t pmd,
 		return NULL;
 
 	nid = page_to_nid(page);
-	if (!node_isset(nid, node_states[N_MEMORY]))
+	if (!node_isset(nid, node_states[N_MEMORY]) &&
+	    !node_isset(nid, node_states[N_MEMORY_PRIVATE]))
 		return NULL;
 
 	return page;
@@ -3602,6 +3604,10 @@ static int show_numa_map(struct seq_file *m, void *v)
 		if (md->node[nid])
 			seq_printf(m, " N%d=%lu", nid, md->node[nid]);
 
+	for_each_node_state(nid, N_MEMORY_PRIVATE)
+		if (md->node[nid])
+			seq_printf(m, " N%d=%lu", nid, md->node[nid]);
+
 	seq_printf(m, " kernelpagesize_kB=%lu", vma_kernel_pagesize(vma) >> 10);
 out:
 	seq_putc(m, '\n');
-- 
2.53.0-Meta