On Mon, Apr 19, 2021 at 04:41:00PM +0900, Johannes Thumshirn wrote:
> When relocating a block group the freed up space is not discarded in one
> big block, but each extent is discarded on it's own with -odisard=sync.
> For a zoned filesystem we need to discard the whole block group at once,
> so btrfs_discard_extent() will translate the discard into a
> REQ_OP_ZONE_RESET operation, which then resets the device's zone.
> Link: 
> https://lore.kernel.org/linux-btrfs/459e2932c48e12e883dcfd3dda828d9da251d5b5.1617962110.git.johannes.thumsh...@wdc.com

The link points to the same patch in v3, is there something missing in
this patch that should be added to the changelog?

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