Messages in this thread | | | Date | Tue, 25 Jul 2017 14:04:18 -0400 | From | Josef Bacik <> | Subject | Re: [PATCH v2 02/23] percpu: introduce start_offset to pcpu_chunk |
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On Mon, Jul 24, 2017 at 07:01:59PM -0400, Dennis Zhou wrote: > From: "Dennis Zhou (Facebook)" <dennisszhou@gmail.com> > > The reserved chunk arithmetic uses a global variable > pcpu_reserved_chunk_limit that is set in the first chunk init code to > hide a portion of the area map. The bitmap allocator to come will > eventually move the base_addr up and require both the reserved chunk > and static chunk to maintain this offset. pcpu_reserved_chunk_limit is > removed and start_offset is added. > > The first chunk that is circulated and is pcpu_first_chunk serves the > dynamic region, the region following the reserved region. The reserved > chunk address check will temporarily use the first chunk to identify its > address range. A following patch will increase the base_addr and remove > this. If there is no reserved chunk, this will check the static region > and return false because those values should never be passed into the > allocator. > > Lastly, when linking in the first chunk, make sure to count the right > free region for the number of empty populated pages. > > Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Thanks,
Josef
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