Re: [Qemu-devel] [PATCH v4 0/5] qcow2: async handling of fragmented io

[Vladimir Sementsov-Ogievskiy]

13.09.2019 11:58, Max Reitz wrote:
> On 16.08.19 17:30, Vladimir Sementsov-Ogievskiy wrote:
>> Hi all!
>>
>> Here is an asynchronous scheme for handling fragmented qcow2
>> reads and writes. Both qcow2 read and write functions loops through
>> sequential portions of data. The series aim it to parallelize these
>> loops iterations.
>> It improves performance for fragmented qcow2 images, I've tested it
>> as described below.
> 
> Thanks, I’ve changed two things:
> - Replaced assert((x & (BDRV_SECTOR_SIZE - 1)) == 0) by
>    assert(QEMU_IS_ALIGNED(x, BDRV_SECTOR_SIZE)) in patch 3 (conflict with
>    “block: Use QEMU_IS_ALIGNED”), and
> - Replaced the remaining instance of “qcow2_co_do_pwritev()” by
>    “qcow2_co_pwritev_task()” in a comment in patch 4
> 
> and applied the series to my block branch:
> 
> https://git.xanclic.moe/XanClic/qemu/commits/branch/block
> 
> Max
> 

Thank you!!!

-- 
Best regards,
Vladimir