linux-kernel - Re: [PATCH 09/16] blktrace: remove struct blk_io_trace from __blk_add

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Message-ID: <20250919151157.GI28352@lst.de>
Date: Fri, 19 Sep 2025 17:11:57 +0200
From: Christoph Hellwig <hch@....de>
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 09/16] blktrace: remove struct blk_io_trace from
 __blk_add_trace

On Tue, Sep 09, 2025 at 01:06:04PM +0200, Johannes Thumshirn wrote:
> Now that relaying the blktrace protocol information via relayfs has been
> removed from __blk_add_trace(), it only uses 'struct blk_io_trace' for the
> ftrace portion of the function.
> 
> Directly pass in the reserved area of the ftrace ring buffer to
> record_blktrace_event().

Shouldn't this be part of the patch splitting out record_blktrace_event?

>