On Fri, Mar 23, 2018 at 11:48 AM, <ceph@xxxxxxxxxxxxxx> wrote:
> The stock kernel from Debian is perfect
> Spectre / meltdown mitigations are worthless for a Ceph point of view,
> and should be disabled (again, strictly from a Ceph point of view)
>
> If you need the luminous features, using the userspace implementations
> is required (librbd via rbd-nbd or qemu, libcephfs via fuse etc)
luminous cluster-wide feature bits are supported since kernel 4.13.
Thanks,
Ilya
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