[RFC PATCH v2 25/25] ext4: enable large folio for regular file with iomap buffered IO path

[Zhang Yi <yi.zhang@huaweicloud.com>]

From: Zhang Yi <yi.zhang@huawei.com>

After we convert buffered IO path to iomap for regular files, we can
enable large foilo for them together, that should be able to bring a lot
of performance gains for large IO.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
---
 fs/ext4/ialloc.c      | 4 +++-
 fs/ext4/inode.c       | 4 +++-
 fs/ext4/move_extent.c | 1 +
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 956b9d69c559..5a22fe5aa46b 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -1336,8 +1336,10 @@ struct inode *__ext4_new_inode(struct mnt_idmap *idmap,
 		}
 	}
 
-	if (ext4_should_use_buffered_iomap(inode))
+	if (ext4_should_use_buffered_iomap(inode)) {
 		ext4_set_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP);
+		mapping_set_large_folios(inode->i_mapping);
+	}
 
 	if (ext4_handle_valid(handle)) {
 		ei->i_sync_tid = handle->h_transaction->t_tid;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 2d2b8f2b634d..49a5b9b85407 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5319,8 +5319,10 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
 	if (ret)
 		goto bad_inode;
 
-	if (ext4_should_use_buffered_iomap(inode))
+	if (ext4_should_use_buffered_iomap(inode)) {
 		ext4_set_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP);
+		mapping_set_large_folios(inode->i_mapping);
+	}
 
 	if (S_ISREG(inode->i_mode)) {
 		inode->i_op = &ext4_file_inode_operations;
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 7a9ca71d4cac..aecd6112d8a2 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -560,6 +560,7 @@ static int ext4_disable_buffered_iomap_aops(struct inode *inode)
 	truncate_inode_pages(inode->i_mapping, 0);
 
 	ext4_clear_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP);
+	mapping_clear_large_folios(inode->i_mapping);
 	ext4_set_aops(inode);
 	filemap_invalidate_unlock(inode->i_mapping);
 
-- 
2.39.2