linux-kernel - [RFC PATCH v3 26/26] ext4: enable large folio for regular file with iomap buffered IO path

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Message-Id: <20240127015825.1608160-27-yi.zhang@huaweicloud.com>
Date: Sat, 27 Jan 2024 09:58:25 +0800
From: Zhang Yi <yi.zhang@...weicloud.com>
To: linux-ext4@...r.kernel.org
Cc: linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	tytso@....edu,
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	djwong@...nel.org,
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	zokeefe@...gle.com,
	yi.zhang@...wei.com,
	yi.zhang@...weicloud.com,
	chengzhihao1@...wei.com,
	yukuai3@...wei.com,
	wangkefeng.wang@...wei.com
Subject: [RFC PATCH v3 26/26] ext4: enable large folio for regular file with iomap buffered IO path

From: Zhang Yi <yi.zhang@...wei.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@...wei.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 30067775e828..a1dbfc2b904c 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5384,8 +5384,10 @@ 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