linux-kernel - Re: [PATCH 2/2] scsi: add scsi trace core function and put trace points

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Message-ID: <20100120083818.GB5020@infradead.org>
Date:	Wed, 20 Jan 2010 03:38:18 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc:	Kei Tokunaga <tokunaga.keiich@...fujitsu.com>,
	linux-scsi@...r.kernel.org,
	James Bottomley <James.Bottomley@...e.de>,
	Ingo Molnar <mingo@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	lkml <linux-kernel@...r.kernel.org>,
	Li Zefan <lizf@...fujitsu.com>,
	Xiao Guangrong <xiaoguangrong@...fujitsu.com>,
	Tomohiro Kusumi <kusumi.tomohiro@...fujitsu.com>
Subject: Re: [PATCH 2/2] scsi: add scsi trace core function and put trace
	points

On Wed, Jan 20, 2010 at 02:58:34AM -0500, Martin K. Petersen wrote:
> >>>>> "Kei" == Kei Tokunaga <tokunaga.keiich@...fujitsu.com> writes:
> 
> +	TP_printk("host_no=%u channel=%u id=%u lun=%u cmnd=(%s %s raw=%s) "
>                               ^^^^^^^^^^
> 
> I'm not sure anybody cares about channels in this millennium so that may
> be a waste of space.

IT;s still used for adressing things internally.  E.g. in sas we
typically map ports to them.

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