[dm-devel] [PATCH v4 00/11] Zoned block device support improvements

[Damien Le Moal]

Jens,

On 2018/10/14 7:43, Jens Axboe wrote:
> On 10/12/18 4:08 AM, Damien Le Moal wrote:
>> This series improves zoned block device support (reduce overhead) and
>> introduces many simplifications to the code (overall, there are more deletions
>> than insertions).
>>
>> In more details:
>> * Patches 1 to 3 are SCSI side (sd driver) cleanups and improvements reducing
>>   the overhead of report zones command execution during disk scan and
>>   revalidation.
>> * Patches 4 to 9 improve the useability and user API of zoned block devices.
>> * Patch 10 is the main part of this series. This patch replaces the
>>   REQ_OP_ZONE_REPORT BIO/request operation for executing report zones commands
>>   with a block device file operation, removing the need for the command reply
>>   payload in-place rewriting in the BIO buffer. This leads to major
>>   simplification of the code in many places.
>> * Patch 11 further simplifies the code of low level drivers by providing a
>>   generic implementation of zoned block device request queue zone bitmaps
>>   initialization and revalidation.
>>
>> Please consider the addition of these patches in 4.20.
>> Comments are as always welcome.
> 
> How do we want to funnel this series? 1-3 look separate, so perhaps they
> should go through the scsi tree. Then I can take the rest. Or do some
> of the later ones depend on 1-3 being in, in terms of applying cleanly?
> I can also take all of them, looks like only #3 needs a SCSI ack.

Patch 10 and 11 will not apply cleanly for the scsi part without 1-3 in first.
1-3, 10 and 11 would need an ack/review from Martin (SCSI).
And 10-11 also probably need an ack/review from Mike for the DM changes.

Best regards.

-- 
Damien Le Moal
Western Digital Research