linux-kernel - [PATCH v3] f2fs: zone: wait for inflight dio completion, excluding pinned files read using dio

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Message-ID: <20250722060240.1469-1-yohan.joung@sk.com>
Date: Tue, 22 Jul 2025 15:02:40 +0900
From: "yohan.joung" <yohan.joung@...com>
To: jaegeuk@...nel.org,
	chao@...nel.org
Cc: linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	pilhyun.kim@...com,
	"yohan.joung" <yohan.joung@...com>
Subject: [PATCH v3] f2fs: zone: wait for inflight dio completion, excluding pinned files read using dio

read for the pinfile using Direct I/O do not wait for dio write.

Signed-off-by: yohan.joung <yohan.joung@...com>
---
 fs/f2fs/file.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 4039ccb5022c..58a4d25eb08f 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -4834,6 +4834,7 @@ static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 	struct inode *inode = file_inode(iocb->ki_filp);
 	const loff_t pos = iocb->ki_pos;
 	ssize_t ret;
+	bool dio;
 
 	if (!f2fs_is_compress_backend_ready(inode))
 		return -EOPNOTSUPP;
@@ -4842,12 +4843,15 @@ static ssize_t f2fs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 		f2fs_trace_rw_file_path(iocb->ki_filp, iocb->ki_pos,
 					iov_iter_count(to), READ);
 
+	dio = f2fs_should_use_dio(inode, iocb, to);
+
 	/* In LFS mode, if there is inflight dio, wait for its completion */
 	if (f2fs_lfs_mode(F2FS_I_SB(inode)) &&
-	    get_pages(F2FS_I_SB(inode), F2FS_DIO_WRITE))
+	    get_pages(F2FS_I_SB(inode), F2FS_DIO_WRITE) &&
+		(!f2fs_is_pinned_file(inode) || !dio))
 		inode_dio_wait(inode);
 
-	if (f2fs_should_use_dio(inode, iocb, to)) {
+	if (dio) {
 		ret = f2fs_dio_read_iter(iocb, to);
 	} else {
 		ret = filemap_read(iocb, to, 0);
-- 
2.33.0