Re: [PATCH V4 0/6] block/rbd: migrate to coroutines and add write zeroes support

[Peter Lieven]

> Am 02.07.2021 um 14:46 schrieb Ilya Dryomov <idryomov@gmail.com>:
> 
> On Fri, Jul 2, 2021 at 11:09 AM Peter Lieven <pl@kamp.de> wrote:
>> 
>> this series migrates the qemu rbd driver from the old aio emulation
>> to native coroutines and adds write zeroes support which is important
>> for block operations.
>> 
>> To achive this we first bump the librbd requirement to the already
>> outdated luminous release of ceph to get rid of some wrappers and
>> ifdef'ry in the code.
>> 
>> V4->V4:
>> - this patch is now rebased on top of current master
>> - Patch 1: just mention librbd, tweak version numbers [Ilya]
>> - Patch 3: use rbd_get_size instead of rbd_stat [Ilya]
>> - Patch 4: retain comment about using a BH in the callback [Ilya]
>> - Patch 5: set BDRV_REQ_NO_FALLBACK and silently ignore BDRV_REQ_MAY_UNMAP 
>> [Ilya]
>> 
>> V2->V3:
>> - this patch is now rebased on top of current master
>> - Patch 1: only use cc.links and not cc.run to not break
>>   cross-compiling. [Kevin]
>>   Since Qemu 6.1 its okay to rely on librbd >= 12.x since RHEL-7
>>   support was dropped [Daniel]
>> - Patch 4: dropped
>> - Patch 5: store BDS in RBDTask and use bdrv_get_aio_context() [Kevin]
>> 
>> V1->V2:
>> - this patch is now rebased on top of current master with Paolos
>>   upcoming fixes for the meson.build script included:
>>    - meson: accept either shared or static libraries if --disable-static
>>    - meson: honor --enable-rbd if cc.links test fails
>> - Patch 1: adjusted to meson.build script
>> - Patch 2: unchanged
>> - Patch 3: new patch
>> - Patch 4: do not implement empty detach_aio_context callback [Jason]
>> - Patch 5: - fix aio completion cleanup in error case [Jason]
>>            - return error codes from librbd
>> - Patch 6: - add support for thick provisioning [Jason]
>>            - do not set write zeroes alignment
>> - Patch 7: new patch
>> 
>> Peter Lieven (6):
>>  block/rbd: bump librbd requirement to luminous release
>>  block/rbd: store object_size in BDRVRBDState
>>  block/rbd: update s->image_size in qemu_rbd_getlength
>>  block/rbd: migrate from aio to coroutines
>>  block/rbd: add write zeroes support
>>  block/rbd: drop qemu_rbd_refresh_limits
>> 
>> block/rbd.c | 406 ++++++++++++++++------------------------------------
>> meson.build |   7 +-
>> 2 files changed, 128 insertions(+), 285 deletions(-)
>> 
>> --
>> 2.17.1
>> 
>> 
> 
> Looks good to me!
> 
> Kevin picked up Or's encryption patch, so there are a few simple
> conflicts with https://repo.or.cz/qemu/kevin.git block now.  Do you
> want to rebase on top of Kevin's block branch and repost with
> "Based-on: <20210627114635.39326-1-oro@il.ibm.com>" or some such in
> the cover letter or should I?
> 

Please do, i am already ooo and off for vacation. I wasn’t aware of a conflict 
in Kevin’s git repo, sorry.

Peter

> Thanks,
> 
>                Ilya