Re: [PATCH v5 0/5] RAID 0/1/10 atomic write support

[Martin K. Petersen]

John,

> 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).

LGTM.

Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>

-- 
Martin K. Petersen	Oracle Linux Engineering