linux-kernel - Re: [dm-devel] [PATCH v2] staging: writeboost: Add dm-writeboost

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Date:	Fri, 12 Dec 2014 12:41:21 +0100
From:	Bart Van Assche <bvanassche@....org>
To:	Akira Hayakawa <ruby.wktk@...il.com>
CC:	snitzer@...hat.com, gregkh@...uxfoundation.org,
	driverdev-devel@...uxdriverproject.org, thornber@...hat.com,
	linux-kernel@...r.kernel.org, dm-devel@...hat.com,
	Mark Ruijter <mruijter@...il.com>
Subject: Re: [dm-devel] [PATCH v2] staging: writeboost: Add dm-writeboost

On 12/12/14 10:35, Akira Hayakawa wrote:
> Writeboost batches number of writes into a log (that is 512KB large) and submits to SSD
> which maximizes the throughput and the lifetime of the SSD.

Does this mean that dm-writeboost is similar to btier ? If so, this 
makes me wonder which of these two subsystems would be the best 
candidate for upstream inclusion. As far as I know btier doesn't split 
bio's. The source code of btier can be downloaded from 
http://sourceforge.net/projects/tier/.

Bart.

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