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f2fs: add iostat latency tracking for direct IO

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F2FS did not collect iostat latency for direct IO reads and writes,
hook iomap_dio_ops.submit_io to bind an iostat context and record the
submission timestamp. Replace bi_end_io with f2fs_dio_end_bio() to
collect IO latency on completion before calling back to the original
iomap_dio_bio_end_io(), to add iostat latency tracking support for
F2FS DIO.

Signed-off-by: shengyong1 <shengyong1@xiaomi.com>
Signed-off-by: liujinbao1 <liujinbao1@xiaomi.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
liujinbao1 2026-05-13 22:14:36 +08:00 committed by Jaegeuk Kim
parent 5dfb768326
commit caac757a3d
1 changed files with 35 additions and 0 deletions
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35
fs/f2fs/file.c
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@ -4784,6 +4784,30 @@ static bool f2fs_should_use_dio(struct inode *inode, struct kiocb *iocb,
return true;
}
#ifdef CONFIG_F2FS_IOSTAT
static void f2fs_dio_end_bio(struct bio *bio)
{
struct bio_iostat_ctx *iostat_ctx = bio->bi_private;
void *orig_bi_private = iostat_ctx->post_read_ctx;
iostat_update_and_unbind_ctx(bio);
bio->bi_private = orig_bi_private;
iomap_dio_bio_end_io(bio);
}
static void f2fs_dio_iostat_start(struct f2fs_sb_info *sbi, struct bio *bio)
{
void *bi_private = bio->bi_private;
iostat_alloc_and_bind_ctx(sbi, bio, bi_private);
iostat_update_submit_ctx(bio, DATA);
bio->bi_end_io = f2fs_dio_end_bio;
}
#else
static inline void f2fs_dio_iostat_start(struct f2fs_sb_info *sbi,
struct bio *bio) {}
#endif
static int f2fs_dio_read_end_io(struct kiocb *iocb, ssize_t size, int error,
unsigned int flags)
{
@ -4796,8 +4820,18 @@ static int f2fs_dio_read_end_io(struct kiocb *iocb, ssize_t size, int error,
return 0;
}
static void f2fs_dio_read_submit_io(const struct iomap_iter *iter,
struct bio *bio, loff_t file_offset)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(iter->inode);
f2fs_dio_iostat_start(sbi, bio);
blk_crypto_submit_bio(bio);
}
static const struct iomap_dio_ops f2fs_iomap_dio_read_ops = {
.end_io = f2fs_dio_read_end_io,
.submit_io = f2fs_dio_read_submit_io,
};
static ssize_t f2fs_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
@ -5078,6 +5112,7 @@ static void f2fs_dio_write_submit_io(const struct iomap_iter *iter,
bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, DATA, temp);
bio->bi_write_stream =
f2fs_io_type_to_write_stream(bio->bi_bdev, DATA, temp);
f2fs_dio_iostat_start(sbi, bio);
blk_crypto_submit_bio(bio);
}