percpu: update the header comment and pcpu_build_alloc_info comments

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The header comment for percpu memory is a little hard to parse and is
not super clear about how the first chunk is managed. This adds a
little more clarity to the situation.

There is also quite a bit of tricky logic in the pcpu_build_alloc_info.
This adds a restructure of a comment to add a little more information.
Unfortunately, you will still have to piece together a handful of other
comments too, but should help direct you to the meaningful comments.

Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

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Dennis Zhou (Facebook) 2017-07-15 22:23:09 -04:00 • committed by Tejun Heo

parent 6b9b6f3994

commit 9c01516278

1 changed files with 32 additions and 26 deletions

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mm/percpu.c

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