From mboxrd@z Thu Jan  1 00:00:00 1970
From: "hch-jcswGhMUV9g@public.gmane.org" <hch-jcswGhMUV9g@public.gmane.org>
Subject: Re: [PATCH 25/27] block: remove the discard_zeroes_data
	flag
Date: Thu, 11 May 2017 08:26:30 +0200
Message-ID: <20170511062630.GA18517@lst.de>
References: <20170405172125.22600-26-hch@lst.de>
	<1493671519.2665.15.camel@sandisk.com>
	<1493707425.23202.77.camel@haakon3.risingtidesystems.com>
	<1493709373.23202.79.camel@haakon3.risingtidesystems.com>
	<20170502072328.GA11522@lst.de>
	<1493782395.23202.84.camel@haakon3.risingtidesystems.com>
	<20170507092209.GA27370@lst.de>
	<1494312374.16894.36.camel@haakon3.risingtidesystems.com>
	<20170510140627.GA23759@lst.de>
	<1494478235.16894.115.camel@haakon3.risingtidesystems.com>
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To: "Nicholas A. Bellinger" <nab-IzHhD5pYlfBP7FQvKIMDCQ@public.gmane.org>
Cc: "axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org" <axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org>, "linux-raid-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-raid-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "martin.petersen-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org" <martin.petersen-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>, "snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org" <snitzer-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "philipp.reisner-63ez5xqkn6DQT0dZR+AlfA@public.gmane.org" <philipp.reisner-63ez5xqkn6DQT0dZR+AlfA@public.gmane.org>, "linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org" <dm-devel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Bart Van Assche <Bart.VanAssche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>, "lars.ellenberg-63ez5xqkn6DQT0dZR+AlfA@public.gmane.org" <lars.ellenberg-63ez5xqkn6DQT0dZR+AlfA@public.gmane.org>, "shli-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org" <shli-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, "hch-jcswGhMUV9g@public.gmane.org" <hch-jcswGhMUV9g@public.gmane.org>, "agk-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org" <agk-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, "drbd-dev-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org" <drbd-dev-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org>
List-Id: dm-devel.ids

On Wed, May 10, 2017 at 09:50:35PM -0700, Nicholas A. Bellinger wrote:
> 1) Expose a block_device or request_queue bit to signal 'real LBPRZ'
> support up to IBLOCK, in order to maintain SCSI target feature
> compatibility.

No way.  If you want to zero use REQ_OP_WRITE_ZEROES..