linux-kernel - Re: [PATCH v2 01/11] scsi: Convert struct Scsi_Host->cmd_serial_number to atomic

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Date:	Fri, 17 Sep 2010 21:56:29 -0500
From:	Mike Christie <michaelc@...wisc.edu>
To:	Joe Eykholt <jeykholt@...co.com>
CC:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Vasu Dev <vasu.dev@...ux.intel.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Matthew Wilcox <willy@...ux.intel.com>,
	James Bottomley <James.Bottomley@...e.de>,
	James Smart <james.smart@...lex.com>,
	Andrew Vasquez <andrew.vasquez@...gic.com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Hannes Reinecke <hare@...e.de>, Christoph Hellwig <hch@....de>
Subject: Re: [PATCH v2 01/11] scsi: Convert struct Scsi_Host->cmd_serial_number
 to atomic_t

On 09/17/2010 09:45 PM, Mike Christie wrote:
> The comments for serial_number say that it is only supposed to be used
> for debugging printks and most drivers use it for that. However, it
> looks like mpt and dpt_i2o are using it for error handling and/or lookup
> type of operations. I think the mpt* uses are not needed in the abort
> checks.

Oh yeah, forgot to say, for dpt I think you could just replace the 
serial_number with the host wide tagging.
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