On 6/21/21 11:14 PM, Jens Axboe wrote:

On 6/14/21 11:49 PM, Coly Li wrote:

quoted

Hi Jens,

Here are the bcache patches for Linux v5.14.

The patches from Chao Yu and Ding Senjie are useful code cleanup. The
rested patches for the NVDIMM support to bcache journaling.

For the series to support NVDIMM to bache journaling, all reported
issue since last merge window are all fixed. And no more issue detected
during our testing or by the kernel test robot. If there is any issue
reported during they stay in linux-next, I, Jianpang and Qiaowei will
response and fix immediately.

Please take them for Linux v5.14.

I'd really like the user api bits to have some wider review. Maybe
I'm missing something, but there's a lot of weird stuff in the uapi
header that includes things like pointers etc.

Hi Jens,

As I explained 2 merge windows before, we use nvdimm as non-volatiled
memory, that is, the
memory objects are stored on nvdimm as memory object which are
non-volatiled. This is why
you see the pointers in the data structure, e.g. the list is stored on
NVDIMM area, and the code
goes through the list directly on the NVDIMM, we don't load them into
memory.

This is not block device interface.

I try to ask Dan Williams, Jan Kara, Christoph Hellwig and Hannes
Reineicke to help to review,
hope there are some experts may help to take a look.

Coly Li