Re: [bch-nvm-pages v7 0/6] nvm page allocator for bcache

[Coly Li <colyli@suse.de>]

On 3/17/21 11:10 PM, Qiaowei Ren wrote:
> This series implements nvm pages allocator for bcache. This idea is from
> one discussion about nvdimm use case in kernel together with Coly. Coly
> sent the following email about this idea to give some introduction on what
> we will do before:
> 
> https://lore.kernel.org/linux-bcache/bc7e71ec-97eb-b226-d4fc-d8b64c1ef41a@suse.de/
> 
> Here this series focus on the first step in above email, that is to say,
> this patch set implements a generic framework in bcache to allocate/release
> NV-memory pages, and provide allocated pages for each requestor after reboot.
> In order to do this, one simple buddy system is implemented to manage NV-memory
> pages.
> 
> This set includes one testing module which can be used for simple test cases.
> Next need to stroe bcache log or internal btree nodes into nvdimm based on
> these buddy apis to do more testing.
> 
> 
> Coly Li (1):
>   bcache: add initial data structures for nvm pages
> 
> Jianpeng Ma (5):
>   bcache: initialize the nvm pages allocator
>   bcache: initialization of the buddy
>   bcache: bch_nvm_alloc_pages() of the buddy
>   bcache: bch_nvm_free_pages() of the buddy
>   bcache: get allocated pages from specific owner
> 
>  drivers/md/bcache/Kconfig       |   6 +
>  drivers/md/bcache/Makefile      |   2 +-
>  drivers/md/bcache/nvm-pages.c   | 737 ++++++++++++++++++++++++++++++++
>  drivers/md/bcache/nvm-pages.h   |  91 ++++
>  drivers/md/bcache/super.c       |   3 +
>  include/uapi/linux/bcache-nvm.h | 196 +++++++++
>  6 files changed, 1034 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/md/bcache/nvm-pages.c
>  create mode 100644 drivers/md/bcache/nvm-pages.h
>  create mode 100644 include/uapi/linux/bcache-nvm.h
> 

Hi Qiaowei and Jianpeng,

Thanks for the improved version. Now I start to work on the integration
and testing, and the on-nvdimm data structure will change a little by
the feed back from Jens.

I will update later for the result or issue during my testing.

Coly Li