On 1/22/25 8:19 AM, Zi Yan wrote:
Commit 4d684b5f92ba ("mm: shmem: add large folio support for tmpfs") has added large folio support to shmem. Remove the restriction in split_huge_page*().
Reviewed-by: Yang Shi yang@os.amperecomputing.com
Signed-off-by: Zi Yan ziy@nvidia.com Reviewed-by: Baolin Wang baolin.wang@linux.alibaba.com
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 3d3ebdc002d5..deb4e72daeb9 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -3299,7 +3299,7 @@ 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));@@ -3465,12 +3465,6 @@ 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