tree 1f81884066512810be81731a76fb5e041ac62c22
parent 458a3e644c3327be529393982e24277eda8f1ac7
author Tejun Heo <tj@kernel.org> 1235444241 +0900
committer Tejun Heo <tj@kernel.org> 1235444241 +0900

percpu: remove unit_size power-of-2 restriction

Impact: allow unit_size to be arbitrary multiple of PAGE_SIZE

In dynamic percpu allocator, there is no reason the unit size should
be power of two.  Remove the restriction.

As non-power-of-two unit size means that empty chunks fall into the
same slot index as lightly occupied chunks which is bad for reclaming.
Reserve an extra slot for empty chunks.

Signed-off-by: Tejun Heo <tj@kernel.org>