Re: [PATCH v4 0/8] block: add zone write granularity limit

[Damien Le Moal <Damien.LeMoal@wdc.com>]

On 2021/01/28 13:50, Damien Le Moal wrote:
> The first patch of this series adds missing documentation of the
> zone_append_max_bytes sysfs attribute.
> 
> The following 3 patches are cleanup and preparatory patches for the
> introduction of the zone write granularity limit. The goal of these
> patches is to have all code setting a device queue zoned model to use
> the helper function blk_queue_set_zoned(). The nvme driver, null_blk
> driver and the partition code are modified to do so.
> 
> The fourth patch in this series introduces the zone write granularity
> queue limit to indicate the alignment constraint for write operations
> into sequential zones of zoned block devices. This limit is always set
> by default to the device logical block size. The following patch
> documents this new limit.
> 
> The last 2 patches introduce the blk_queue_clear_zone_settings()
> function and modify the SCSI sd driver to clear the zone related queue
> limits and resources of a host-aware zoned disk that is changed to a
> regular disk due to the presence of partitions.

Hi Jens,

Any comment on this series ?

Martin,

The scsi bits (patch 5 and 8) may need your ack.

Thanks !

> 
> Changes from v3:
> * Added pathces 2, 3, 4, 7 and 8
> * Addressed Christoph's comments on patch 5
> 
> Changes from v2:
> * Added patch 3 for zonefs
> * Addressed Christoph's comments on patch 1 and added the limit
>   initialization for zoned nullblk
> 
> Changes from v1:
> * Fixed typo in patch 2
> 
> Damien Le Moal (8):
>   block: document zone_append_max_bytes attribute
>   nvme: cleanup zone information initialization
>   nullb: use blk_queue_set_zoned() to setup zoned devices
>   block: use blk_queue_set_zoned in add_partition()
>   block: introduce zone_write_granularity limit
>   zonefs: use zone write granularity as block size
>   block: introduce blk_queue_clear_zone_settings()
>   sd_zbc: clear zone resources for non-zoned case
> 
> Damien Le Moal (8):
>   block: document zone_append_max_bytes attribute
>   nvme: cleanup zone information initialization
>   nullb: use blk_queue_set_zoned() to setup zoned devices
>   block: use blk_queue_set_zoned in add_partition()
>   block: introduce zone_write_granularity limit
>   zonefs: use zone write granularity as block size
>   block: introduce blk_queue_clear_zone_settings()
>   sd_zbc: clear zone resources for non-zoned case
> 
>  Documentation/block/queue-sysfs.rst | 13 +++++++++
>  block/blk-settings.c                | 39 +++++++++++++++++++++++++-
>  block/blk-sysfs.c                   |  8 ++++++
>  block/blk-zoned.c                   | 17 ++++++++++++
>  block/blk.h                         |  2 ++
>  block/partitions/core.c             |  2 +-
>  drivers/block/null_blk/zoned.c      |  8 +++---
>  drivers/nvme/host/core.c            | 11 ++++----
>  drivers/nvme/host/zns.c             | 11 ++------
>  drivers/scsi/sd_zbc.c               | 43 ++++++++++++++++++++++++++---
>  fs/zonefs/super.c                   |  9 +++---
>  include/linux/blkdev.h              | 15 ++++++++++
>  12 files changed, 150 insertions(+), 28 deletions(-)
> 


-- 
Damien Le Moal
Western Digital Research