linux-kernel - Re: [PATCH] hpsa: SCSI driver for HP Smart Array controllers

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Date:	Mon, 02 Mar 2009 14:37:19 -0600
From:	Mike Christie <michaelc@...wisc.edu>
To:	Jens Axboe <jens.axboe@...cle.com>
CC:	Grant Grundler <grundler@...gle.com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	mike.miller@...com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	hare@...ell.com, iss_storagedev@...com, iss.sbteam@...com
Subject: Re: [PATCH] hpsa: SCSI driver for HP Smart Array controllers

Mike Christie wrote:
> iscsi also needs the unique tag and then it needs the 
> blk_map_queue_find_tag functionality too. iscsi needs the lookup and tag 
> for host/transport level commands that do not have a scsi 
> command/request. The tag value has to be unique accross the 
> host/transport

I mean that the tag needs to be unique for scsi/block commands and 
transport commands for each host. So a scsi command and a transport 
command cannot both have tag X.

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