On 9/22/26 2:03 PM, Itai Handler wrote: ...> Exercised on arm64 with a 64K page granule: plain dm-crypt with
sector_size 65536 over NVMe, block level round trip, fio random
Could you please point me to at least one consumer-grade NVMe drive that supports a 64k sector size? Allowing a bigger sector size in dm-crypt means you can end up with partial dm-crypt sector writes (after power fail), which opens another can of worms. Your dm-verity argument does not apply here; it is a read-only target. Also, arguments based on cryptsetup/LUKS2 do not make much sense for kernel code. They must be compatible and work together, but dm-crypt can be used without any userspace validation, so all limits must be checked in the kernel. LUKS2 limits the sector size to 4k for multiplatform compatibility. dm-crypt itself can support bigger sectors, but I just do not see much use for it with common NVMe drives or other storage. Milan
