linux-kernel - Re: [PATCH blktrace v2 05/22] blktrace: add definitions for blk_io

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Message-ID: <e0f057f8-9e39-4d41-a338-37c4793c6ab9@kernel.org>
Date: Wed, 1 Oct 2025 16:53:28 +0900
From: Damien Le Moal <dlemoal@...nel.org>
To: Johannes Thumshirn <johannes.thumshirn@....com>,
 Jens Axboe <axboe@...nel.dk>
Cc: 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>,
 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 blktrace v2 05/22] blktrace: add definitions for
 blk_io_trace2

On 9/26/25 00:04, Johannes Thumshirn wrote:
> Add 'struct blk_io_trace2' which represents the extended version of the
> blktrace protocol.
> 
> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@....com>
> ---
>  blktrace_api.h | 35 +++++++++++++++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
> 
> diff --git a/blktrace_api.h b/blktrace_api.h
> index 9f435a5..bbf075f 100644
> --- a/blktrace_api.h
> +++ b/blktrace_api.h
> @@ -27,8 +27,19 @@ enum {
>  	BLK_TC_END	= 1 << 15,	/* we've run out of bits! */
>  };
>  
> +enum blktrace_cat2 {
> +	BLK_TC_ZONE_APPEND      = 1 << 1ull,    /* zone append */

Kernel side starts this at 1ULL << 16. SO I think you are out of sync with the
kernel side with these user patches...

> +	BLK_TC_ZONE_RESET       = 1 << 2ull,    /* zone reset */
> +	BLK_TC_ZONE_RESET_ALL   = 1 << 3ull,    /* zone reset all */
> +	BLK_TC_ZONE_FINISH      = 1 << 4ull,    /* zone finish */
> +	BLK_TC_ZONE_OPEN        = 1 << 5ull,    /* zone open */
> +	BLK_TC_ZONE_CLOSE       = 1 << 6ull,    /* zone close */
> +};

-- 
Damien Le Moal
Western Digital Research