Re: [PATCH v15 00/42] btrfs: zoned block device support

On 10/02/2021 21:02, David Sterba wrote:

quoted

This series implements superblock log writing. It uses two zones as a
circular buffer to write updated superblocks. Once the first zone is filled
up, start writing into the second zone. The first zone will be reset once
both zones are filled. We can determine the postion of the latest
superblock by reading the write pointer information from a device.

About that, in this patchset it's still leaving superblock at the fixed
zone number while we want it at a fixed location, spanning 2 zones
regardless of their size.

We'll always need 2 zones or otherwise we won't be powercut safe.