The patch titled
Subject: xen: balloon: update the NR_BALLOON_PAGES state
has been added to the -mm mm-unstable branch. Its filename is
xen-balloon-update-the-nr_balloon_pages-state.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/xen-balloon-update-the-nr_balloon_pages-state.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Nico Pache <npache@xxxxxxxxxx>
Subject: xen: balloon: update the NR_BALLOON_PAGES state
Date: Fri, 14 Mar 2025 15:37:57 -0600
Update the NR_BALLOON_PAGES counter when pages are added to or removed
from the Xen balloon.
Link: https://lkml.kernel.org/r/20250314213757.244258-5-npache@xxxxxxxxxx
Signed-off-by: Nico Pache <npache@xxxxxxxxxx>
Cc: Alexander Atanasov <alexander.atanasov@xxxxxxxxxxxxx>
Cc: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Dexuan Cui <decui@xxxxxxxxxxxxx>
Cc: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Juegren Gross <jgross@xxxxxxxx>
Cc: Kanchana P Sridhar <kanchana.p.sridhar@xxxxxxxxx>
Cc: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Nhat Pham <nphamcs@xxxxxxxxx>
Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Cc: Shakeel Butt <shakeel.butt@xxxxxxxxx>
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Wei Liu <wei.liu@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/xen/balloon.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/xen/balloon.c~xen-balloon-update-the-nr_balloon_pages-state
+++ a/drivers/xen/balloon.c
@@ -157,6 +157,8 @@ static void balloon_append(struct page *
list_add(&page->lru, &ballooned_pages);
balloon_stats.balloon_low++;
}
+ inc_node_page_state(page, NR_BALLOON_PAGES);
+
wake_up(&balloon_wq);
}
@@ -179,6 +181,8 @@ static struct page *balloon_retrieve(boo
balloon_stats.balloon_low--;
__ClearPageOffline(page);
+ dec_node_page_state(page, NR_BALLOON_PAGES);
+
return page;
}
_
Patches currently in -mm which might be from npache@xxxxxxxxxx are
meminfo-add-a-per-node-counter-for-balloon-drivers.patch
balloon_compaction-update-the-nr_balloon_pages-state.patch
hv_balloon-update-the-nr_balloon_pages-state.patch
xen-balloon-update-the-nr_balloon_pages-state.patch
