linux-kernel - Re: [PATCH v4 1/2] lightnvm: add non-continuous lun target creation support

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Date:	Mon, 21 Mar 2016 08:55:12 +0100
From:	Javier González <jg@...htnvm.io>
To:	Wenwei Tao <ww.tao0320@...il.com>
Cc:	Matias Bjørling <mb@...htnvm.io>,
	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org
Subject: Re: [PATCH v4 1/2] lightnvm: add non-continuous lun target creation support

Hi Wenwei,

> On 19 Mar 2016, at 13:52, Wenwei Tao <ww.tao0320@...il.com> wrote:
> 
> Hi Javier
> 
> Thanks for the comment.
> I've been busy recently, so this letter is kind of late, hope you don't mind.
> I use the qemu-nvme you mentioned and configure the nvme device driver
> follow the example, it turns out the nvme device is 1 lun, I don't
> know how to configure multiple lun, so I just modify the source code
> to make it multiple lun,
> I'm not sure the modification is right, although it seems works, but
> for sake of safe I also use null_blk driver to debug this patch too.
> It turns out the target creation fail is due to wrong return value
> judgement in rrpc_luns_init().

Multiple LUN support can be found on this branch [1]. We are running
tests; we will merge it into master soon. You are welcome to use it and
send a pull-request if you see that something is missing. Please note
the new options for LightNVM on top of the hw/block/nvme.c

[1]https://github.com/OpenChannelSSD/qemu-nvme/tree/wl_sim

Javier



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