powerpc/mm: Dump hash table

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Useful to be able to dump the kernel hash page table to check
which pages are hashed along with their sizes and other details.

Add a debugfs file to check the hash page table. If radix is enabled
(and so there is no hash page table) then this file doesn't exist. To
use this the PPC_PTDUMP config option must be selected.

Signed-off-by: Rashmica Gupta <rashmicy@gmail.com>
[mpe: Fix build with SPARSEMEM_VMEMMAP=n & PSERIES=n]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Rashmica Gupta 2016-05-27 15:49:00 +10:00 • committed by Michael Ellerman

parent 8eb07b1870

commit 1515ab9321

2 changed files with 553 additions and 1 deletions

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arch/powerpc/mm/Makefile

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551

arch/powerpc/mm/dump_hashpagetable.c

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