perf,mm: Handle non-page-table-aligned hugetlbfs

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A limited nunmber of architectures support hugetlbfs sizes that do not
align with the page-tables (ARM64, Power, Sparc64). Add support for
this to the generic perf_get_page_size() implementation, and also
allow an architecture to override this implementation.

This latter is only needed when it uses non-page-table aligned huge
pages in its kernel map.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>

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Peter Zijlstra 2020-10-09 11:09:27 +02:00

parent 995f088efe

commit 51b646b2d9

2 changed files with 37 additions and 6 deletions

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4

include/linux/perf_event.h

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39

kernel/events/core.c

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