Re: [Qemu-devel] [PATCH 0/2] block/file-posix: Fix xfs_write_zeroes()

[Max Reitz]

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