Dne 22. 08. 19 v 19:09 Max Reitz napsal(a):
> On 22.08.19 18:53, Paolo Bonzini wrote:
>> On 22/08/19 18:26, Max Reitz wrote:
>>> Lukàš ran over a nasty regression in our xfs_write_zeroes() function
>>> (sorry, my fault) made apparent by a recent patch from Anton that makes
>>> qcow2 images heavily exercise the offending code path.
>>>
>>> This series fixes the bug and adds a test to prevent it from
>>> reoccurring.
>>>
>>>
>>> Max Reitz (2):
>>> block/file-posix: Fix xfs_write_zeroes()
>>> iotests: Test reverse sub-cluster qcow2 writes
>>>
>>> block/file-posix.c | 16 ++++++---
>>> tests/qemu-iotests/265 | 67 ++++++++++++++++++++++++++++++++++++++
>>> tests/qemu-iotests/265.out | 6 ++++
>>> tests/qemu-iotests/group | 1 +
>>> 4 files changed, 85 insertions(+), 5 deletions(-)
>>> create mode 100755 tests/qemu-iotests/265
>>> create mode 100644 tests/qemu-iotests/265.out
>>>
>>
>> What about just killing libxfs support and only use fallocate?
>> FALLOC_FL_ZERO_RANGE was added in Linux 3.15 (2014) and the only
>> platform we probably support with such an old kernel is of course
>> RHEL/CentOS 7 which has had it backported.
>
> Works just as well for me. :-)
>
> Max
>
Whatever you decide, anyway this patch fixes my arm installation issue and the attached qemu iotest is also passing on my system.
Thank you,
Lukáš
Tested-by: Lukáš Doktor <ldoktor@redhat.com>