From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@lst.de>
Subject: Re: command emulation fix
Date: Thu, 19 Jan 2017 21:41:35 +0100
Message-ID: <20170119204135.GA6675@lst.de>
References: <1484412602-11801-1-git-send-email-hch@lst.de> <20170115230723.GB14446@mtj.duckdns.org> <20170116152120.GA16072@lst.de> <20170118191750.GA9171@mtj.duckdns.org> <20170119143551.GA31203@lst.de> <20170119202316.GA25390@mtj.duckdns.org> <20170119202725.GB6403@lst.de> <20170119203458.GC25390@mtj.duckdns.org> <20170119203646.GD25390@mtj.duckdns.org>
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To: Tejun Heo <tj@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>, linux-ide@vger.kernel.org

On Thu, Jan 19, 2017 at 03:36:46PM -0500, Tejun Heo wrote:
> But do you actually expect there to be scalability issues around this
> buffer?  Its uses are extremely short and libata operations are pretty
> strongly synchronized to begin with.

Mostly for setups using JBODs with massive numbers of SATA disks.

This would mostly not be ahci or a real ATA driver but libsas calling
into libata for the translation.