From: Hao Ge <hao.ge@linux.dev>
To: Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>
Cc: linux-mm@kvack.org, virtualization@lists.linux.dev,
linux-kernel@vger.kernel.org, Hao Ge <hao.ge@linux.dev>
Subject: [PATCH] mm/balloon: expose per-node balloon pages in node meminfo
Date: Fri, 8 May 2026 09:53:16 +0800 [thread overview]
Message-ID: <20260508015316.25722-1-hao.ge@linux.dev> (raw)
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
next reply other threads:[~2026-05-08 1:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-08 1:53 Hao Ge [this message]
2026-05-08 8:23 ` [PATCH] mm/balloon: expose per-node balloon pages in node meminfo David Hildenbrand (Arm)
2026-05-08 9:59 ` Hao Ge
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260508015316.25722-1-hao.ge@linux.dev \
--to=hao.ge@linux.dev \
--cc=akpm@linux-foundation.org \
--cc=david@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=virtualization@lists.linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox