linux-kernel - Re: [PATCH 0/4] lightnvm: base 2.0 implementation

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Message-ID: <DA4E2087-F1E8-4903-9B53-95CFECD6B868@cnexlabs.com>
Date:   Thu, 8 Feb 2018 09:35:16 +0000
From:   Javier Gonzalez <javier@...xlabs.com>
To:     Matias Bjørling <mb@...htnvm.io>
CC:     "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/4] lightnvm: base 2.0 implementation

> On 5 Feb 2018, at 13.15, Matias Bjørling <mb@...htnvm.io> wrote:
> 
> Hi,
> 
> A couple of patches for 2.0 support for the lightnvm subsystem. They
> form the basis for integrating 2.0 support.
> 
> For the rest of the support, Javier has code that implements report
> chunk and sets up the LBA format data structure. He also has a bunch
> of patches that brings pblk up to speed.
> 
> The first two patches is preparation for the 2.0 work. The third patch
> implements the 2.0 data structures, the geometry command, and exposes
> the sysfs attributes that comes with the 2.0 specification. Note that
> the attributes between 1.2 and 2.0 are different, and it is expected
> that user-space shall use the version sysfs attribute to know which
> attributes will be available.
> 
> The last patch implements support for using the nvme namespace logical
> block and metadata fields and sync it with the internal lightnvm
> identify structures.
> 
> -Matias
> 
> Matias Bjørling (4):
>  lightnvm: make 1.2 data structures explicit
>  lightnvm: flatten nvm_id_group into nvm_id
>  lightnvm: add 2.0 geometry identification
>  nvme: lightnvm: add late setup of block size and metadata
> 
> drivers/lightnvm/core.c      |  27 ++-
> drivers/nvme/host/core.c     |   2 +
> drivers/nvme/host/lightnvm.c | 508 ++++++++++++++++++++++++++++++++-----------
> drivers/nvme/host/nvme.h     |   2 +
> include/linux/lightnvm.h     |  64 +++---
> 5 files changed, 426 insertions(+), 177 deletions(-)
> 
> --
> 2.11.0

Thanks for posting these. I have started rebasing my patches on top of
the new geometry - it is a bit different of how I implemented it, but
I'll take care of it.

I'll review as I go - some of the changes I have might make sense to
squash in your patches to keep a clean history...

I'll add a couple of patches abstracting the geometry so that at core.c
level we only work with a single geometry structure. This is they way it
is done in the early patches I pointe you to before. Then it is patches
building bottom-up support for the new features in 2.0.

Javier

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