f2fs: merge FUA command with the existing writes

Jaegeuk Kim · Jaegeuk Kim · commit 44749759d5e6 · 2025-09-09T03:26:36.000Z
FUA writes can be merged to the existing write IOs.

Reviewed-by: Chao Yu &lt;chao@kernel.org&gt;
Signed-off-by: Jaegeuk Kim &lt;jaegeuk@kernel.org&gt;
diff --git 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,

Original file line number	Diff line number	Diff line change
`@@ -733,9 +733,11 @@ static bool page_is_mergeable(struct f2fs_sb_info sbi, struct bio bio,`
`733`	`733`	`static bool io_type_is_mergeable(struct f2fs_bio_info *io,`
`734`	`734`	`struct f2fs_io_info *fio)`
`735`	`735`	`{`
	`736`	`+ blk_opf_t mask = ~(REQ_PREFLUSH \| REQ_FUA);`
	`737`	`+`
`736`	`738`	`if (io->fio.op != fio->op)`
`737`	`739`	`return false;`
`738`		`- return io->fio.op_flags == fio->op_flags;`
	`740`	`+ return (io->fio.op_flags & mask) == (fio->op_flags & mask);`
`739`	`741`	`}`
`740`	`742`
`741`	`743`	`static bool io_is_mergeable(struct f2fs_sb_info sbi, struct bio bio,`