This patch adds a way to attach HIPRI by expanding the existing sysfs's
data_io_flag. User can measure IO performance by enabling it.
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
Documentation/ABI/testing/sysfs-fs-f2fs | 16 +++++++++-------
fs/f2fs/data.c | 2 ++
fs/f2fs/f2fs.h | 3 +++
3 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs
b/Documentation/ABI/testing/sysfs-fs-f2fs
index b268e3e18b4a..ac52e1c6bcbc 100644
--- a/Documentation/ABI/testing/sysfs-fs-f2fs
+++ b/Documentation/ABI/testing/sysfs-fs-f2fs
@@ -369,13 +369,15 @@ Contact: "Jaegeuk Kim" <jaeg...@kernel.org>
Description: Give a way to attach REQ_META|FUA to data writes
given temperature-based bits. Now the bits indicate:
- +-------------------+-------------------+
- | REQ_META | REQ_FUA |
- +------+------+-----+------+------+-----+
- | 5 | 4 | 3 | 2 | 1 | 0 |
- +------+------+-----+------+------+-----+
- | Cold | Warm | Hot | Cold | Warm | Hot |
- +------+------+-----+------+------+-----+
+ +------------+-------------------+-------------------+
+ | HIPRI_DIO | REQ_META | REQ_FUA |
+ +------------+------+------+-----+------+------+-----+
+ | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
+ +------------+------+------+-----+------+------+-----+
+ | All | Cold | Warm | Hot | Cold | Warm | Hot |
+ +------------+------+------+-----+------+------+-----+
+
+ Note that, HIPRI_DIO bit is only for direct IO path.
What: /sys/fs/f2fs/<disk>/node_io_flag
Date: June 2020
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 9f754aaef558..faa40aca2848 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -3707,6 +3707,8 @@ static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct
iov_iter *iter)
if (do_opu)
down_read(&fi->i_gc_rwsem[READ]);
}
+ if (sbi->data_io_flag & HIPRI_DIO)
+ iocb->ki_flags |= IOCB_HIPRI;
err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
iter, rw == WRITE ? get_data_block_dio_write :
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index ce9fc9f13000..094f1e8ff82b 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1557,6 +1557,9 @@ struct decompress_io_ctx {
#define MAX_COMPRESS_LOG_SIZE 8
#define MAX_COMPRESS_WINDOW_SIZE(log_size) ((PAGE_SIZE) << (log_size))
+/* HIPRI for direct IO used in sysfs/data_io_flag */
+#define HIPRI_DIO (1 << 6)
+
struct f2fs_sb_info {
struct super_block *sb; /* pointer to VFS super block */
struct proc_dir_entry *s_proc; /* proc entry */
--
2.34.0.rc0.344.g81b53c2807-goog
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