Update the NR_BALLOON_PAGES counter when pages are added or removed using
the balloon compaction interface.
The virtio, Vmware, and pseries-cmm balloon drivers utilize the
balloon_compaction interface to allocate and free balloon pages. Other
balloon drivers will have to maintain this counter manually.
Signed-off-by: Nico Pache <redacted>
---
mm/balloon_compaction.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c
index 6597ebea8ae2..d3e00731e262 100644
--- a/mm/balloon_compaction.c
+++ b/mm/balloon_compaction.c
@@ -24,6 +24,7 @@ static void balloon_page_enqueue_one(struct balloon_dev_info *b_dev_info,
balloon_page_insert(b_dev_info, page);
unlock_page(page);
__count_vm_event(BALLOON_INFLATE);
+ inc_node_page_state(page, NR_BALLOON_PAGES);
}
/**
@@ -103,6 +104,7 @@ size_t balloon_page_list_dequeue(struct balloon_dev_info *b_dev_info,
__count_vm_event(BALLOON_DEFLATE);
list_add(&page->lru, pages);
unlock_page(page);
+ dec_node_page_state(page, NR_BALLOON_PAGES);
n_pages++;
}
spin_unlock_irqrestore(&b_dev_info->pages_lock, flags);
--
2.48.1