Commit 4d684b5f92ba ("mm: shmem: add large folio support for tmpfs") has
added large folio support to shmem. Remove the restriction in
split_huge_page*().
Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
---
mm/huge_memory.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index c89aed1510f1..511b5b23894b 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -3287,7 +3287,7 @@ static void __split_huge_page(struct page *page, struct list_head *list,
/* Some pages can be beyond EOF: drop them from page cache */
if (tail->index >= end) {
if (shmem_mapping(folio->mapping))
- nr_dropped++;
+ nr_dropped += new_nr;
else if (folio_test_clear_dirty(tail))
folio_account_cleaned(tail,
inode_to_wb(folio->mapping->host));
@@ -3453,12 +3453,6 @@ int split_huge_page_to_list_to_order(struct page *page, struct list_head *list,
return -EINVAL;
}
} else if (new_order) {
- /* Split shmem folio to non-zero order not supported */
- if (shmem_mapping(folio->mapping)) {
- VM_WARN_ONCE(1,
- "Cannot split shmem folio to non-0 order");
- return -EINVAL;
- }
/*
* No split if the file system does not support large folio.
* Note that we might still have THPs in such mappings due to
--
2.45.2
