linux-kernel - Re: [PATCH v2] f2fs: use flush command instead of FUA for zoned device

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Message-ID: <YmGA5X4mtmXc3p/m@google.com>
Date:   Thu, 21 Apr 2022 09:05:57 -0700
From:   Jaegeuk Kim <jaegeuk@...nel.org>
To:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH v2] f2fs: use flush command instead of FUA for zoned
 device

The block layer for zoned disk can reorder the FUA'ed IOs. Let's use flush
command to keep the write order.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---

 change log from v1:
  - minor clean up

 fs/f2fs/file.c | 3 ++-
 fs/f2fs/node.c | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f08e6208e183..eae2e7908072 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -372,7 +372,8 @@ static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
 	f2fs_remove_ino_entry(sbi, ino, APPEND_INO);
 	clear_inode_flag(inode, FI_APPEND_WRITE);
 flush_out:
-	if (!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER)
+	if ((!atomic && F2FS_OPTION(sbi).fsync_mode != FSYNC_MODE_NOBARRIER) ||
+	    (atomic && !test_opt(sbi, NOBARRIER) && f2fs_sb_has_blkzoned(sbi)))
 		ret = f2fs_issue_flush(sbi, inode->i_ino);
 	if (!ret) {
 		f2fs_remove_ino_entry(sbi, ino, UPDATE_INO);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index c45d341dcf6e..144f9f966690 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1631,7 +1631,7 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
 		goto redirty_out;
 	}
 
-	if (atomic && !test_opt(sbi, NOBARRIER))
+	if (atomic && !test_opt(sbi, NOBARRIER) && !f2fs_sb_has_blkzoned(sbi))
 		fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
 
 	/* should add to global list before clearing PAGECACHE status */
-- 
2.36.0.rc2.479.g8af0fa9b8e-goog