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Subject[PATCH] mm/balloon: expose per-node balloon pages in node meminfo
Date
Commit 835de37603ef ("meminfo: add a per node counter for balloon
drivers") added NR_BALLOON_PAGES and exposed it in /proc/meminfo.
However, the per-node view at /sys/devices/system/node/nodeX/meminfo
was not updated, even though the counter is already tracked per-node.

Add it to node_read_meminfo() so users can see balloon usage per
NUMA node without having to parse the raw vmstat file.

Signed-off-by: Hao Ge <hao.ge@linux.dev>
---
drivers/base/node.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index d7647d077b66..53f4e51d6d82 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -513,6 +513,7 @@ static ssize_t node_read_meminfo(struct device *dev,
"Node %d Slab: %8lu kB\n"
"Node %d SReclaimable: %8lu kB\n"
"Node %d SUnreclaim: %8lu kB\n"
+ "Node %d Balloon: %8lu kB\n"
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
"Node %d AnonHugePages: %8lu kB\n"
"Node %d ShmemHugePages: %8lu kB\n"
@@ -543,7 +544,8 @@ static ssize_t node_read_meminfo(struct device *dev,
node_page_state(pgdat, NR_KERNEL_MISC_RECLAIMABLE)),
nid, K(sreclaimable + sunreclaimable),
nid, K(sreclaimable),
- nid, K(sunreclaimable)
+ nid, K(sunreclaimable),
+ nid, K(node_page_state(pgdat, NR_BALLOON_PAGES))
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
,
nid, K(node_page_state(pgdat, NR_ANON_THPS)),
--
2.25.1

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