linux-kernel - Re: [PATCH 2/3] target: Add max_write_same

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Message-ID: <20121115105312.GC28956@infradead.org>
Date:	Thu, 15 Nov 2012 05:53:12 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
Cc:	target-devel <target-devel@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@....de>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Subject: Re: [PATCH 2/3] target: Add max_write_same_len device attribute

On Thu, Nov 08, 2012 at 08:07:17PM +0000, Nicholas A. Bellinger wrote:
> From: Nicholas Bellinger <nab@...ux-iscsi.org>
> 
> This patch adds a new max_write_same_len device attribute for use with
> WRITE_SAME w/ UNMAP=0 backend emulation.
> 
> Also, update block limits VPD emulation code in spc_emulate_evpd_b0() to
> set the default MAXIMUM WRITE SAME LENGTH value of zero.

why do we need an exposed attribute for this?

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