percpu: end chunk area maps page aligned for the populated bitmap

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The area map allocator manages the first chunk area by hiding all but
the region it is responsible for serving in the area map. To align this
with the populated page bitmap, end_offset is introduced to keep track
of the delta to end page aligned. The area map is appended with the
page aligned end when necessary to be in line with how the bitmap
allocator requires the ending to be aligned with the LCM of PAGE_SIZE
and the size of each bitmap block. percpu_stats is updated to ignore
this region when present.

Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

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Dennis Zhou (Facebook) 2017-07-24 19:02:03 -04:00 • committed by Tejun Heo

parent 10edf5b0b6

commit 6b9d7c8e8e

3 changed files with 15 additions and 2 deletions

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3

mm/percpu-internal.h

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5

mm/percpu-stats.c

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9

mm/percpu.c

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