[dm-devel] [PATCH v5 00/11] dm: Improve zoned block device support

[Jens Axboe]

On 6/2/21 12:32 PM, Mike Snitzer wrote:
> On Tue, Jun 01 2021 at  6:57P -0400,
> Damien Le Moal <Damien.LeMoal at wdc.com> wrote:
> 
>> On 2021/05/26 6:25, Damien Le Moal wrote:
>>> This series improve device mapper support for zoned block devices and
>>> of targets exposing a zoned device.
>>
>> Mike, Jens,
>>
>> Any feedback regarding this series ?
>>
>>>
>>> The first patch improve support for user requests to reset all zones of
>>> the target device. With the fix, such operation behave similarly to
>>> physical block devices implementation based on the single zone reset
>>> command with the ALL bit set.
>>>
>>> The following 2 patches are preparatory block layer patches.
>>>
>>> Patch 4 and 5 are 2 small fixes to DM core zoned block device support.
>>>
>>> Patch 6 reorganizes DM core code, moving conditionally defined zoned
>>> block device code into the new dm-zone.c file. This avoids sprinkly DM
>>> with zone related code defined under an #ifdef CONFIG_BLK_DEV_ZONED.
>>>
>>> Patch 7 improves DM zone report helper functions for target drivers.
>>>
>>> Patch 8 fixes a potential problem with BIO requeue on zoned target.
>>>
>>> Finally, patch 9 to 11 implement zone append emulation using regular
>>> writes for target drivers that cannot natively support this BIO type.
>>> The only target currently needing this emulation is dm-crypt. With this
>>> change, a zoned dm-crypt device behaves exactly like a regular zoned
>>> block device, correctly executing user zone append BIOs.
>>>
>>> This series passes the following tests:
>>> 1) zonefs tests on top of dm-crypt with a zoned nullblk device
>>> 2) zonefs tests on top of dm-crypt+dm-linear with an SMR HDD
>>> 3) btrfs fstests on top of dm-crypt with zoned nullblk devices.
>>>
>>> Comments are as always welcome.
> 
> I've picked up DM patches 4-8 because they didn't depend on the first
> 3 block patches.
> 
> But I'm fine with picking up 1-3 if Jens provides his Acked-by.
> And then I can pickup the remaining DM patches 9-11.

I'm fine with 1-3, you can add my Acked-by to those.

-- 
Jens Axboe