diff mbox series

f2fs: add iostat support for FS_DISCARD_IO

Message ID 20221212054706.65579-1-frank.li@vivo.com
State New
Headers
Series f2fs: add iostat support for FS_DISCARD_IO |

Commit Message

李扬韬 Dec. 12, 2022, 5:47 a.m. UTC 
  Just like other data we count uses the number of bytes as the basic
unit, but discard uses the number of cmds as the statistical unit. In
fact, the discard command contains the number of blocks. In order to
avoid breaking its usage of application, let's keeping FS_DISCARD
as it is, and add FS_DISCARD_IO to account discard bytes.

Suggested-by: Chao Yu <chao@kernel.org>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 fs/f2fs/f2fs.h    | 1 +
 fs/f2fs/iostat.c  | 5 +++++
 fs/f2fs/segment.c | 2 +-
 3 files changed, 7 insertions(+), 1 deletion(-)

Comments

Chao Yu Dec. 12, 2022, 10:23 a.m. UTC | #1 
On 2022/12/12 13:47, Yangtao Li wrote:
> Just like other data we count uses the number of bytes as the basic
> unit, but discard uses the number of cmds as the statistical unit. In
> fact, the discard command contains the number of blocks. In order to
> avoid breaking its usage of application, let's keeping FS_DISCARD
> as it is, and add FS_DISCARD_IO to account discard bytes.
> 
> Suggested-by: Chao Yu <chao@kernel.org>
> Signed-off-by: Yangtao Li <frank.li@vivo.com>

Reviewed-by: Chao Yu <chao@kernel.org>

Thanks,
Jaegeuk Kim Dec. 12, 2022, 11:01 p.m. UTC | #2 
Please check the previous comment.

On 12/12, Chao Yu wrote:
> On 2022/12/12 13:47, Yangtao Li wrote:
> > Just like other data we count uses the number of bytes as the basic
> > unit, but discard uses the number of cmds as the statistical unit. In
> > fact, the discard command contains the number of blocks. In order to
> > avoid breaking its usage of application, let's keeping FS_DISCARD
> > as it is, and add FS_DISCARD_IO to account discard bytes.
> > 
> > Suggested-by: Chao Yu <chao@kernel.org>
> > Signed-off-by: Yangtao Li <frank.li@vivo.com>
> 
> Reviewed-by: Chao Yu <chao@kernel.org>
> 
> Thanks,
diff mbox series

Patch

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index e8953c3dc81a..ef0043003bf8 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1193,6 +1193,7 @@  enum iostat_type {
 	FS_META_READ_IO,		/* meta read IOs */
 
 	/* other */
+	FS_DISCARD_IO,		/* discard IOs */
 	FS_DISCARD,			/* discard */
 	NR_IO_TYPE,
 };
diff --git a/fs/f2fs/iostat.c b/fs/f2fs/iostat.c
index 3166a8939ed4..3d2f0b69cdda 100644
--- a/fs/f2fs/iostat.c
+++ b/fs/f2fs/iostat.c
@@ -89,6 +89,8 @@  int __maybe_unused iostat_info_seq_show(struct seq_file *seq, void *offset)
 
 	/* print other IOs */
 	seq_puts(seq, "[OTHER]\n");
+	seq_printf(seq, "fs discard bytes:	%-16llu\n",
+				sbi->rw_iostat[FS_DISCARD_IO]);
 	seq_printf(seq, "fs discard:		%-16llu\n",
 				sbi->rw_iostat[FS_DISCARD]);
 
@@ -180,6 +182,9 @@  void f2fs_update_iostat(struct f2fs_sb_info *sbi, struct inode *inode,
 	spin_lock_irqsave(&sbi->iostat_lock, flags);
 	sbi->rw_iostat[type] += io_bytes;
 
+	if (type == FS_DISCARD_IO)
+		sbi->rw_iostat[FS_DISCARD]++;
+
 	if (type == APP_BUFFERED_IO || type == APP_DIRECT_IO)
 		sbi->rw_iostat[APP_WRITE_IO] += io_bytes;
 
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index dee712f7225f..bd02631f9681 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1187,7 +1187,7 @@  static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
 
 		atomic_inc(&dcc->issued_discard);
 
-		f2fs_update_iostat(sbi, NULL, FS_DISCARD, 1);
+		f2fs_update_iostat(sbi, NULL, FS_DISCARD_IO, len * F2FS_BLKSIZE);
 
 		lstart += len;
 		start += len;