Messages in this thread | | | Date | Tue, 25 Jul 2017 14:33:52 -0400 | From | Josef Bacik <> | Subject | Re: [PATCH v2 12/23] percpu: increase minimum percpu allocation size and align first regions |
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On Mon, Jul 24, 2017 at 07:02:09PM -0400, Dennis Zhou wrote: > From: "Dennis Zhou (Facebook)" <dennisszhou@gmail.com> > > This patch increases the minimum allocation size of percpu memory to > 4-bytes. This change will help minimize the metadata overhead > associated with the bitmap allocator. The assumption is that most > allocations will be of objects or structs greater than 2 bytes with > integers or longs being used rather than shorts. > > The first chunk regions are now aligned with the minimum allocation > size. The reserved region is expected to be set as a multiple of the > minimum allocation size. The static region is aligned up and the delta > is removed from the dynamic size. This works because the dynamic size is > increased to be page aligned. If the static size is not minimum > allocation size aligned, then there must be a gap that is added to the > dynamic size. The dynamic size will never be smaller than the set value. > > Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Thanks,
Josef
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