linux-kernel - Re: [PATCH v6 0/4] SCT Write Same

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Message-ID: <20160825152811.GA20479@htj.duckdns.org>
Date:   Thu, 25 Aug 2016 11:28:11 -0400
From:   Tejun Heo <tj@...nel.org>
To:     Shaun Tancheff <shaun@...cheff.com>
Cc:     linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
        Christoph Hellwig <hch@....de>, Tom Yan <tom.ty89@...il.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Damien Le Moal <damien.lemoal@...t.com>,
        Hannes Reinecke <hare@...e.de>,
        Josh Bingaman <josh.bingaman@...gate.com>,
        Hannes Reinecke <hare@...e.com>
Subject: Re: [PATCH v6 0/4] SCT Write Same

Hello,

On Sun, Aug 21, 2016 at 11:23:17PM -0500, Shaun Tancheff wrote:
> At some point the method of issuing Write Same for ATA drives changed.
> Currently write same is commonly available via SCT so expose the SCT
> capabilities and use SCT Write Same when it is available.
> 
> This is useful for zoned based media that prefers to support discard
> with lbprz set, aka discard zeroes data by mapping discard operations to
> reset write pointer operations. Conventional zones that do not support
> reset write pointer can still honor the discard zeroes data by issuing
> a write same over the zone.
> 
> It may also be nice to know if various controllers that currently
> disable WRITE SAME will work with the SCT Write Same code path:
>   aacraid, arcmsr, megaraid, 3w-9xxx, 3w-sas, 3w-xxxx, gdth, hpsa, ips,
>   megaraid, pmcraid, storvsc_drv

Applied 1-4 to libata/for-4.9.

Thanks.

-- 
tejun