[42/45] mm/memcontrol: Make mem_cgroup_move_test_walk skip hugetlb vmas

Commit Message

Oscar Salvador July 4, 2024, 4:31 a.m. UTC

Skip hugetlb vmas as we are not interested in those.

Signed-off-by: Oscar Salvador <[e-mail]>
---
 mm/memcontrol-v1.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Patch

diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c
index 99cc9501eec1..542922562cf9 100644
--- a/mm/memcontrol-v1.c
+++ b/mm/memcontrol-v1.c
@@ -1319,8 +1319,20 @@  static int mem_cgroup_move_charge_pte_range(pmd_t *pmd,
 	return ret;
 }
 
+static int mem_cgroup_move_test_walk(unsigned long start, unsigned long end,
+				     struct mm_walk *walk)
+{
+	struct vm_area_struct *vma = walk->vma;
+
+	if (is_vm_hugetlb_page(vma))
+		return 1;
+
+	return 0;
+}
+
 static const struct mm_walk_ops charge_walk_ops = {
 	.pmd_entry	= mem_cgroup_move_charge_pte_range,
+	.test_walk      = mem_cgroup_move_test_walk,
 	.walk_lock	= PGWALK_RDLOCK,
 };