On 2025-06-17 23:35, Pascal Hambourg wrote:
On 17/06/2025 à 10:34, Trupti wrote:Thank you,for the very helpful and detailed analysis of the potential btrfs and swap incompatibilities.I do have access to ppc64el VMs and will perform the Bookworm-to-Trixie test scenario you described.I will post my findings here shortly.Ext* filesystems which have a block size larger than the kernel page size are also not supported. Big filesystems created with usage type (-T) "largefile" or "largefile4" might have a block size above 4k when the page size is 64k. But I do not have any hardware to test it.
Confirming test scenario on ppc64el (Bookworm-to-Trixie installer) for both Btrfs and Ext4 partitions.
Both the 15GB Btrfs (/dev/sda4) and 30GB Ext4 (/dev/sda5) partitions, previously created with 64k page size (Bookworm), were recognized by the Trixie installer. However, neither could be assigned a mount point without requiring reformatting, implying data loss.
This confirms the page size incompatibility issue for reusing existing filesystems. Screenshot of these behaviors to follow
Thanks Trupti.
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