From: Dave Chinner <david@fromorbit.com>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: sandeen@sandeen.net, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 09/15] xfs: disambiguate units for ftrace fields tagged "len"
Date: Thu, 19 Aug 2021 13:01:47 +1000 [thread overview]
Message-ID: <20210819030147.GZ3657114@dread.disaster.area> (raw)
In-Reply-To: <162924378154.761813.12918362378497157448.stgit@magnolia>
On Tue, Aug 17, 2021 at 04:43:01PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
>
> Some of our tracepoints have a field known as "len". 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.
>
> "blockcount" are in units of fs blocks
> "daddrcount" are in units of 512b blocks
Hmmm. This is the first set of units I'll consider suggesting a
change in naming - "blockcount" seems ambiguous and easily mistaken,
while "daddrcount" just seems a bit wierd. Perhaps:
"fsbcount" is a length in units of fs blocks
"bbcount" is a length in units of basic (512b) blocks
.....
> @@ -2363,7 +2363,7 @@ DECLARE_EVENT_CLASS(xfs_log_recover_icreate_item_class,
> __entry->length = be32_to_cpu(in_f->icl_length);
> __entry->gen = be32_to_cpu(in_f->icl_gen);
> ),
> - TP_printk("dev %d:%d agno 0x%x agbno 0x%x count %u isize %u length %u "
> + TP_printk("dev %d:%d agno 0x%x agbno 0x%x count %u isize %u blockcount 0x%x "
> "gen %u", MAJOR(__entry->dev), MINOR(__entry->dev),
> __entry->agno, __entry->agbno, __entry->count, __entry->isize,
> __entry->length, __entry->gen)
THis one could probably do with a bit of help - count is the number
of inodes, so the order of the tracepoint probably should be
reworked to put the fsbcount directly after the agbno. i.e.
TP_printk("dev %d:%d agno 0x%x agbno 0x%x fsbcount 0x%x isize %u count %u gen %u",
....
The rest of the conversions look good, though.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2021-08-19 3:01 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-17 23:42 [PATCHSET 00/15] xfs: clean up ftrace field tags and formats Darrick J. Wong
2021-08-17 23:42 ` [PATCH 01/15] xfs: fix incorrect unit conversion in scrub tracepoint Darrick J. Wong
2021-08-19 2:29 ` Dave Chinner
2021-08-19 7:57 ` Carlos Maiolino
2021-08-17 23:42 ` [PATCH 02/15] xfs: standardize inode number formatting in ftrace output Darrick J. Wong
2021-08-19 2:34 ` Dave Chinner
2021-08-19 8:27 ` Carlos Maiolino
2021-08-17 23:42 ` [PATCH 03/15] xfs: standardize AG " Darrick J. Wong
2021-08-19 2:35 ` Dave Chinner
2021-08-19 8:45 ` Carlos Maiolino
2021-08-17 23:42 ` [PATCH 04/15] xfs: standardize AG block " Darrick J. Wong
2021-08-19 2:37 ` Dave Chinner
2021-08-19 9:06 ` Carlos Maiolino
2021-08-17 23:42 ` [PATCH 05/15] xfs: standardize rmap owner " Darrick J. Wong
2021-08-19 2:38 ` Dave Chinner
2021-08-19 9:57 ` Carlos Maiolino
2021-08-17 23:42 ` [PATCH 06/15] xfs: standardize daddr " Darrick J. Wong
2021-08-19 2:42 ` Dave Chinner
2021-08-19 11:02 ` Carlos Maiolino
2021-08-17 23:42 ` [PATCH 07/15] xfs: disambiguate units for ftrace fields tagged "blkno", "block", or "bno" Darrick J. Wong
2021-08-19 2:47 ` Dave Chinner
2021-08-19 11:12 ` Carlos Maiolino
2021-08-17 23:42 ` [PATCH 08/15] xfs: disambiguate units for ftrace fields tagged "offset" Darrick J. Wong
2021-08-19 2:51 ` Dave Chinner
2021-08-19 11:45 ` Carlos Maiolino
2021-08-19 11:42 ` Carlos Maiolino
2021-08-17 23:43 ` [PATCH 09/15] xfs: disambiguate units for ftrace fields tagged "len" Darrick J. Wong
2021-08-19 3:01 ` Dave Chinner [this message]
2021-08-19 3:06 ` Darrick J. Wong
2021-08-19 3:44 ` [PATCH v2 " Darrick J. Wong
2021-08-19 12:08 ` Carlos Maiolino
2021-08-17 23:43 ` [PATCH 10/15] xfs: disambiguate units for ftrace fields tagged "count" Darrick J. Wong
2021-08-19 3:11 ` Dave Chinner
2021-08-19 3:19 ` Darrick J. Wong
2021-08-19 3:45 ` [PATCH v2 " Darrick J. Wong
2021-08-19 5:38 ` Dave Chinner
2021-08-19 12:26 ` Carlos Maiolino
2021-08-17 23:43 ` [PATCH 11/15] xfs: rename i_disk_size fields in ftrace output Darrick J. Wong
2021-08-19 3:14 ` Dave Chinner
2021-08-19 12:32 ` Carlos Maiolino
2021-08-17 23:43 ` [PATCH 12/15] xfs: resolve fork names in trace output Darrick J. Wong
2021-08-19 3:16 ` Dave Chinner
2021-08-19 12:43 ` Carlos Maiolino
2021-08-17 23:43 ` [PATCH 13/15] xfs: standardize remaining xfs_buf length tracepoints Darrick J. Wong
2021-08-19 3:19 ` Dave Chinner
2021-08-19 12:48 ` Carlos Maiolino
2021-08-17 23:43 ` [PATCH 14/15] xfs: standardize inode generation formatting in ftrace output Darrick J. Wong
2021-08-19 3:19 ` Dave Chinner
2021-08-19 12:57 ` Carlos Maiolino
2021-08-17 23:43 ` [PATCH 15/15] xfs: decode scrub flags " Darrick J. Wong
2021-08-19 3:20 ` Dave Chinner
2021-08-19 13:04 ` Carlos Maiolino
2021-08-19 3:07 ` [PATCH 16/15] xfs: start documenting common units and tags used in tracepoints Darrick J. Wong
2021-08-19 3:24 ` Dave Chinner
2021-08-19 3:46 ` [PATCH v2 " Darrick J. Wong
2021-08-19 5:39 ` Dave Chinner
2021-08-19 13:27 ` Carlos Maiolino
2021-08-19 17:06 ` Darrick J. Wong
2021-08-19 17:10 ` [PATCH v3 " Darrick J. Wong
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