On 19/04/2021 19:13, David Sterba wrote:
> 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?

I included this link so one can look up the discussion between Filipe and
me that lead to this decision. But I guess this is not really relevant. 

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