Re: [PATCH 0/2] null_blk: zone support

[Matias BjÃrling]

On 07/06/2018 07:45 PM, Laurence Oberman wrote:
> On Fri, 2018-07-06 at 19:38 +0200, Matias BjÃrling wrote:
> > This series adds support for exposing a zone block device using the
> > null_blk device driver.
> >
> > The first patch moves core null_blk data structures to a shared
> > header
> > file. The second implements the actual zone support. The patchset
> > adds
> > two new options. One to enable the zone interface, and another to
> > define the size of the zones to expose.
> >
> > Thanks,
> > Matias
> >
> > Matias BjÃrling (2):
> >  Â null_blk: move shared definitions to header file
> >  Â null_blk: add zone support
> >
> >  ÂDocumentation/block/null_blk.txt |ÂÂÂ7 ++
> >  Âdrivers/block/MakefileÂÂÂÂÂÂÂÂÂÂÂ|ÂÂÂ5 +-
> >  Âdrivers/block/null_blk.cÂÂÂÂÂÂÂÂÂ| 124 ++++++++++++-----------------
> > ---
> >  Âdrivers/block/null_blk.hÂÂÂÂÂÂÂÂÂ| 108 ++++++++++++++++++++++++++++
> >  Âdrivers/block/null_blk_zoned.cÂÂÂ| 149
> > +++++++++++++++++++++++++++++++++++++++
> >  Â5 files changed, 315 insertions(+), 78 deletions(-)
> >  Âcreate mode 100644 drivers/block/null_blk.h
> >  Âcreate mode 100644 drivers/block/null_blk_zoned.c
>
> Thank you for this will be very useful.
> I will test it to add value.
> I dont know the code well enough to review it
> Regards
> Laurence

Great.

For fio, you can use the zone support here:

  https://github.com/bvanassche/fio

It is in the process of being upstreamed.

Also, you'll need the latest libzbc/util-linux (blkzone) if you want to 
report zones. A bug was fixed around detection of the drive.

  https://github.com/hgst/libzbc
  https://github.com/karelzak/util-linux