linux-kernel - Re: [PATCH] null_blk: Register as a LightNVM device

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Message-ID: <20151112085327.GA28149@infradead.org>
Date:	Thu, 12 Nov 2015 00:53:27 -0800
From:	Christoph Hellwig <hch@...radead.org>
To:	Matias Bj??rling <m@...rling.me>
Cc:	linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
	axboe@...com
Subject: Re: [PATCH] null_blk: Register as a LightNVM device

On Wed, Nov 11, 2015 at 11:06:38AM +0100, Matias Bj??rling wrote:
> Add support for registering as a LightNVM device. This allows us to
> evaluate the performance of the LightNVM library.
> 
> In /drivers/Makefile, LightNVM is moved above block device drivers
> to make sure that the LightNVM media managers have been initialized
> before drivers under /drivers/block are initialized.

I don't think mixing the lighnvm code into null_blk is a good idea.
Please just create a separate null_nvm device for lighnvm. It already
has a completely separate I/O path.
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