On 12/11/2024 12:42, John Garry wrote:
Hi Song, Kuai,
Can you check the remaining 2x patches in this series when you get a chance?
I was hoping that I could get this queued for 6.13 via the block tree.
Thanks,
John
Ps. I do appreciate that I am pinging on this quite early, but those
patches mentioned have not changed since the last revision.
> This series introduces atomic write support for software RAID 0/1/10.
>
> The main changes are to ensure that we can calculate the stacked device
> request_queue limits appropriately for atomic writes. Fundamentally, if
> some bottom does not support atomic writes, then atomic writes are not
> supported for the top device. Furthermore, the atomic writes limits are
> the lowest common supported limits from all bottom devices.
>
> Flag BLK_FEAT_ATOMIC_WRITES_STACKED is introduced to enable atomic writes
> for stacked devices selectively. This ensures that we can analyze and test
> atomic writes support per individual md/dm personality (prior to
> enabling).
>
> Based on 0b4ace9da58d (for-6.13/block) nvme-multipath: don't bother
> clearing max_hw_zone_append_sectors
>
> Differences to v3:
> - Add RB tags from Christoph and Kuai (thanks!)
> - Rebase
>
> Differences to v2:
> - Refactor blk_stack_atomic_writes_limits() (Christoph)
> - Relocate RAID 1/10 BB check (Kuai)
> - Add RB tag from Christoph (Thanks!)
> - Set REQ_ATOMIC for RAID 1/10
>
> John Garry (5):
> block: Add extra checks in blk_validate_atomic_write_limits()
> block: Support atomic writes limits for stacked devices
> md/raid0: Atomic write support
> md/raid1: Atomic write support
> md/raid10: Atomic write support
>
> block/blk-settings.c | 132 +++++++++++++++++++++++++++++++++++++++++
> drivers/md/raid0.c | 1 +
> drivers/md/raid1.c | 14 ++++-
> drivers/md/raid10.c | 14 ++++-
> include/linux/blkdev.h | 4 ++
> 5 files changed, 161 insertions(+), 4 deletions(-)
>