Re: [PATCH v2 00/11] qcow2: make subclusters discardable

[Andrey Drobyshev]

On 5/13/24 9:31 AM, Andrey Drobyshev wrote:
> v1: https://lists.nongnu.org/archive/html/qemu-devel/2023-10/msg07223.html
> 
> Andrey Drobyshev (11):
>   qcow2: make function update_refcount_discard() global
>   qcow2: simplify L2 entries accounting for discard-no-unref
>   qcow2: put discard requests in the common queue when discard-no-unref
>     enabled
>   block/file-posix: add trace event for fallocate() calls
>   iotests/common.rc: add disk_usage function
>   iotests/290: add test case to check 'discard-no-unref' option behavior
>   qcow2: add get_sc_range_info() helper for working with subcluster
>     ranges
>   qcow2: zeroize the entire cluster when there're no non-zero
>     subclusters
>   qcow2: make subclusters discardable
>   qcow2: zero_l2_subclusters: fall through to discard operation when
>     requested
>   iotests/271: add test cases for subcluster-based discard/unmap
> 
>  block/file-posix.c           |   1 +
>  block/qcow2-cluster.c        | 346 ++++++++++++++++++++++++++++-------
>  block/qcow2-refcount.c       |   8 +-
>  block/qcow2-snapshot.c       |   6 +-
>  block/qcow2.c                |  25 +--
>  block/qcow2.h                |   6 +-
>  block/trace-events           |   1 +
>  tests/qemu-iotests/250       |   5 -
>  tests/qemu-iotests/271       |  72 ++++++--
>  tests/qemu-iotests/271.out   |  69 ++++++-
>  tests/qemu-iotests/290       |  34 ++++
>  tests/qemu-iotests/290.out   |  28 +++
>  tests/qemu-iotests/common.rc |   6 +
>  13 files changed, 490 insertions(+), 117 deletions(-)
> 

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