linux-kernel - Re: [PATCH 00/21] blktrace: Add user-space support for zoned command tracing

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Message-Id: <20250914181823.a17382ac3a039dc4a8257578@kernel.org>
Date: Sun, 14 Sep 2025 18:18:23 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Johannes Thumshirn <johannes.thumshirn@....com>
Cc: Jens Axboe <axboe@...nel.dk>, Steven Rostedt <rostedt@...dmis.org>,
 Masami Hiramatsu <mhiramat@...nel.org>, Mathieu Desnoyers
 <mathieu.desnoyers@...icios.com>, linux-block@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
 linux-btrace@...r.kernel.org, John Garry <john.g.garry@...cle.com>, Hannes
 Reinecke <hare@...e.de>, Damien Le Moal <dlemoal@...nel.org>, Christoph
 Hellwig <hch@....de>, Naohiro Aota <naohiro.aota@....com>, Shinichiro
 Kawasaki <shinichiro.kawasaki@....com>, Chaitanya Kulkarni
 <chaitanyak@...dia.com>, "Martin K . Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH 00/21] blktrace: Add user-space support for zoned
 command tracing

Hi Johannes,

On Tue,  9 Sep 2025 13:07:02 +0200
Johannes Thumshirn <johannes.thumshirn@....com> wrote:

> This patch series extends the user-space blktrace tools to support the new
> trace events for zoned block device commands introduced in the corresponding
> kernel patch series.

I guess this series are patches against for user-space blktrace tool

https://git.kernel.dk/?p=blktrace.git

And the updates depends on the kernel side update of your series;

https://lore.kernel.org/all/20250909110611.75559-1-johannes.thumshirn@wdc.com/

Right?
I'm not sure how the blktrace tool development is managed, but please make
sure this series is not for the kernel. (ah, both has blktrace: tag, hmmm)

Thank you,

> 
> The updates include:
> 
> - Introduction of a new ioctl requesting the v2 version of the trace
> - Definitions for new zoned operation trace events.
> - Parsing support in blkparse for these events.
> - Display of the new events with clear labeling (e.g., ZO, ZA, ZR).
> - Backward-compatible changes that do not affect existing functionality.
> 
> These changes complement the kernel patches and allow full visibility into
> zone management commands in blktrace output, enabling better analysis and
> debugging of zoned storage workloads.
> 
> The updated blktrace utility will first issue the BLKTRACESETUP2 ioctl and if
> it fails transpartently fall back to BLKTRACESETUP allowing backwards
> compatibility.
> 
> Feedback and testing on additional device types are appreciated.
> 
> Johannes Thumshirn (21):
>   fix comment for struct blk_trace_setup:
>   add definitions for BLKTRACESETUP2
>   call BLKTRACESETUP2 ioctl per default to setup a trace
>   blktrace: change size of action to 64 bits
>   blktrace: add definitions for blk_io_trace2
>   blktrace: support protocol version 8
>   blkparse: pass magic to get_magic
>   blkparse: read 'magic' first
>   blkparse: factor out reading of a singe blk_io_trace event
>   blkparse: skip unsupported protocol versions
>   blkparse: make get_pdulen() take the pdu_len
>   blkiomon: read 'magic' first
>   blktrace: pass magic to CHECK_MAGIC macro
>   blktrace: pass magic to verify_trace
>   blktrace: rename trace_to_cpu to bit_trace_to_cpu
>   blkparse: use blk_io_trace2 internally
>   blkparse: natively parse blk_io_trace2
>   blkparse: parse zone (un)plug actions
>   blkparse: add zoned commands to fill_rwbs()
>   blkparse: parse zone management commands
>   blkparse: parse zone append completions
> 
>  act_mask.c     |   4 +-
>  blkiomon.c     |  15 +-
>  blkparse.c     | 450 ++++++++++++++++++++++++++++++++++---------------
>  blkparse_fmt.c | 105 +++++++++---
>  blkrawverify.c |  14 +-
>  blktrace.c     |  40 ++++-
>  blktrace.h     |  64 +++++--
>  blktrace_api.h |  54 +++++-
>  8 files changed, 560 insertions(+), 186 deletions(-)
> 
> -- 
> 2.51.0
> 


-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>