linux-kernel - [PATCH] f2fs: merge FUA command with the existing writes

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Message-ID: <20250904181642.3879283-1-jaegeuk@kernel.org>
Date: Thu,  4 Sep 2025 18:16:42 +0000
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH] f2fs: merge FUA command with the existing writes

FUA writes can be merged to the existing write IOs.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/data.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 7961e0ddfca3..30cb2f230690 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -733,9 +733,11 @@ static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
 static bool io_type_is_mergeable(struct f2fs_bio_info *io,
 						struct f2fs_io_info *fio)
 {
+	blk_opf_t mask = ~(REQ_PREFLUSH | REQ_FUA);
+
 	if (io->fio.op != fio->op)
 		return false;
-	return io->fio.op_flags == fio->op_flags;
+	return (io->fio.op_flags & mask) == (fio->op_flags & mask);
 }
 
 static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
-- 
2.51.0.355.g5224444f11-goog