[POWERPC] DEBUG_PAGEALLOC for 64-bit

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Here's an implementation of DEBUG_PAGEALLOC for 64 bits powerpc.
It applies on top of the 32 bits patch.

Unlike Anton's previous attempt, I'm not using updatepp. I'm removing
the hash entries from the bolted mapping (using a map in RAM of all the
slots). Expensive but it doesn't really matter, does it ? :-)

Memory hot-added doesn't benefit from this unless it's added at an
address that is below end_of_DRAM() as calculated at boot time.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

 arch/powerpc/Kconfig.debug      |    2
 arch/powerpc/mm/hash_utils_64.c |   84 ++++++++++++++++++++++++++++++++++++++--
 2 files changed, 82 insertions(+), 4 deletions(-)
Signed-off-by: Paul Mackerras <paulus@samba.org>

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This commit is contained in:

Benjamin Herrenschmidt 2007-04-12 15:30:23 +10:00 • committed by Paul Mackerras

parent 88df6e90fa

commit 370a908db1

2 changed files with 82 additions and 4 deletions

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2

arch/powerpc/Kconfig.debug

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84

arch/powerpc/mm/hash_utils_64.c

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