diff mbox series

[v2,1/6] mm/hugetlb: fix incorrect update of max_huge_pages

Message ID 20220823030209.57434-2-linmiaohe@huawei.com (mailing list archive)
State New
Headers show
Series A few fixup patches for hugetlb | expand

Commit Message

Miaohe Lin Aug. 23, 2022, 3:02 a.m. UTC 
There should be pages_per_huge_page(h) / pages_per_huge_page(target_hstate)
pages incremented for target_hstate->max_huge_pages when page is demoted.
Update max_huge_pages accordingly for consistency.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
---
 mm/hugetlb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index f8f1540108ab..19a7a83af569 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3473,7 +3473,8 @@  static int demote_free_huge_page(struct hstate *h, struct page *page)
 	 * based on pool changes for the demoted page.
 	 */
 	h->max_huge_pages--;
-	target_hstate->max_huge_pages += pages_per_huge_page(h);
+	target_hstate->max_huge_pages +=
+		pages_per_huge_page(h) / pages_per_huge_page(target_hstate);
 
 	return rc;
 }