Just forward this since I wasn't in the ceph-users mail list and it was reject yesterday. Thanks Xiubo Li On Thu, 16 Jul 2026 at 16:53, Xiubo Li <xiubo.li@clyso.com> wrote:

Hi everyone,

We are considering a performance improvement for the CephFS kernel client (kclient) that would be significantly simpler and cleaner to implement as 64-bit-only. Supporting 32-bit in this case adds non-trivial complexity and ongoing maintenance burden, so we'd like to understand whether continuing 32-bit support is still necessary.

Before making any decision, we want to hear from the community:

- Are you currently using, or planning to use, 32-bit (arm/armhf, i386/i686) builds of the CephFS kernel client? - If yes, is this for production workloads? Or legacy/testing purposes? - What is your platform (distribution, kernel version, architecture)?

If there are no active 32-bit users, we would proceed with a 64-bit-only implementation and clearly document the deprecation in the release notes with appropriate warnings.

If 32-bit support is still needed, we will explore alternative approaches — for example, keeping the current code path for 32-bit while the new fast path is 64-bit-only, or finding a way to cleanly abstract the difference.

Please reply by August 6, 2026 so we can factor your feedback into the plan.

Thanks! Xiubo Li