Re: [PATCH v2 10/15] xfs: disambiguate units for ftrace fields tagged "count"

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On Wed, Aug 18, 2021 at 08:45:36PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@xxxxxxxxxx>
> 
> Some of our tracepoints have a field known as "count".  That name
> doesn't describe any units, which makes the fields not very useful.
> Rename the fields to capture units and ensure the format is hexadecimal
> when we're referring to blocks, extents, or IO operations.
> 
> "fsbcount" are in units of fs blocks
> "bytecount" are in units of bytes
> "ireccount" are in units of inode records
> 
> Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> ---
> v2: rename the count units
> ---

Reviewed-by: Carlos Maiolino <cmaiolino@xxxxxxxxxx>

>  fs/xfs/xfs_trace.h |   12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
> index 4169dc6cb5b9..cc479caffd55 100644
> --- a/fs/xfs/xfs_trace.h
> +++ b/fs/xfs/xfs_trace.h
> @@ -346,7 +346,7 @@ DECLARE_EVENT_CLASS(xfs_bmap_class,
>  		__entry->caller_ip = caller_ip;
>  	),
>  	TP_printk("dev %d:%d ino 0x%llx state %s cur %p/%d "
> -		  "fileoff 0x%llx startblock 0x%llx count %lld flag %d caller %pS",
> +		  "fileoff 0x%llx startblock 0x%llx fsbcount 0x%llx flag %d caller %pS",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __print_flags(__entry->bmap_state, "|", XFS_BMAP_EXT_FLAGS),
> @@ -1392,7 +1392,7 @@ DECLARE_EVENT_CLASS(xfs_file_class,
>  		__entry->offset = iocb->ki_pos;
>  		__entry->count = iov_iter_count(iter);
>  	),
> -	TP_printk("dev %d:%d ino 0x%llx size 0x%llx pos 0x%llx count 0x%zx",
> +	TP_printk("dev %d:%d ino 0x%llx size 0x%llx pos 0x%llx bytecount 0x%zx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __entry->size,
> @@ -1439,7 +1439,7 @@ DECLARE_EVENT_CLASS(xfs_imap_class,
>  		__entry->startblock = irec ? irec->br_startblock : 0;
>  		__entry->blockcount = irec ? irec->br_blockcount : 0;
>  	),
> -	TP_printk("dev %d:%d ino 0x%llx size 0x%llx pos 0x%llx count %zd "
> +	TP_printk("dev %d:%d ino 0x%llx size 0x%llx pos 0x%llx bytecount 0x%zx "
>  		  "fork %s startoff 0x%llx startblock 0x%llx fsbcount 0x%llx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
> @@ -1482,7 +1482,7 @@ DECLARE_EVENT_CLASS(xfs_simple_io_class,
>  		__entry->count = count;
>  	),
>  	TP_printk("dev %d:%d ino 0x%llx isize 0x%llx disize 0x%llx "
> -		  "pos 0x%llx count %zd",
> +		  "pos 0x%llx bytecount 0x%zx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
>  		  __entry->ino,
>  		  __entry->isize,
> @@ -3227,7 +3227,7 @@ DECLARE_EVENT_CLASS(xfs_double_io_class,
>  		__field(loff_t, src_isize)
>  		__field(loff_t, src_disize)
>  		__field(loff_t, src_offset)
> -		__field(size_t, len)
> +		__field(long long, len)
>  		__field(xfs_ino_t, dest_ino)
>  		__field(loff_t, dest_isize)
>  		__field(loff_t, dest_disize)
> @@ -3245,7 +3245,7 @@ DECLARE_EVENT_CLASS(xfs_double_io_class,
>  		__entry->dest_disize = dest->i_disk_size;
>  		__entry->dest_offset = doffset;
>  	),
> -	TP_printk("dev %d:%d count %zd "
> +	TP_printk("dev %d:%d bytecount 0x%llx "
>  		  "ino 0x%llx isize 0x%llx disize 0x%llx pos 0x%llx -> "
>  		  "ino 0x%llx isize 0x%llx disize 0x%llx pos 0x%llx",
>  		  MAJOR(__entry->dev), MINOR(__entry->dev),
> 

-- 
Carlos




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