linux-kernel - Re: [PATCH 03/13] scsi: unify allocation of scsi command and sense buffer

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Date:	Tue, 26 May 2009 19:05:05 +0300
From:	Boaz Harrosh <bharrosh@...asas.com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
CC:	James.Bottomley@...senPartnership.com, jens.axboe@...cle.com,
	rdreier@...co.com, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, chris.mason@...cle.com,
	david@...morbit.com, hch@...radead.org, akpm@...ux-foundation.org,
	jack@...e.cz, yanmin_zhang@...ux.intel.com,
	linux-scsi@...r.kernel.org
Subject: Re: [PATCH 03/13] scsi: unify allocation of scsi command and sense
 buffer

On 05/26/2009 06:31 PM, FUJITA Tomonori wrote:
> 
> Can we just fix some drivers not to do the DMA with the sense buffer in
> scsi_cmnd? IIRC, there are only five or six drivers that do such.

This is not so.
All drivers that go through scsi_eh_prep_cmnd() will eventually DMA through
the regular read path. Including all the drivers that do nothing and let
scsi-ml do the REQUEST_SENSE

Actually I have exact numbers, from the last time I did all that

Boaz
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