linux-kernel - [PATCH 41/45] mm/migrate_device: Make migrate_vma_test

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Message-ID: <20240704043132.28501-42-osalvador@suse.de>
Date: Thu,  4 Jul 2024 06:31:28 +0200
From: Oscar Salvador <osalvador@...e.de>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	Peter Xu <peterx@...hat.com>,
	Muchun Song <muchun.song@...ux.dev>,
	David Hildenbrand <david@...hat.com>,
	SeongJae Park <sj@...nel.org>,
	Miaohe Lin <linmiaohe@...wei.com>,
	Michal Hocko <mhocko@...e.com>,
	Matthew Wilcox <willy@...radead.org>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Oscar Salvador <osalvador@...e.de>
Subject: [PATCH 41/45] mm/migrate_device: Make migrate_vma_test_walk skip hugetlb vmas

Skip hugetlb vmas as we are not interested in those.

Signed-off-by: Oscar Salvador <osalvador@...e.de>
---
 mm/migrate_device.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/mm/migrate_device.c b/mm/migrate_device.c
index 6d66dc1c6ffa..c44ac45b207d 100644
--- a/mm/migrate_device.c
+++ b/mm/migrate_device.c
@@ -279,8 +279,20 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp,
 	return 0;
 }
 
+static int migrate_vma_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 migrate_vma_walk_ops = {
 	.pmd_entry		= migrate_vma_collect_pmd,
+	.test_walk		= migrate_vma_test_walk,
 	.pte_hole		= migrate_vma_collect_hole,
 	.walk_lock		= PGWALK_RDLOCK,
 };
-- 
2.26.2