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mm: numa: Add fault driven placement and migration

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NOTE: This patch is based on "sched, numa, mm: Add fault driven
	placement and migration policy" but as it throws away all the policy
	to just leave a basic foundation I had to drop the signed-offs-by.

This patch creates a bare-bones method for setting PTEs pte_numa in the
context of the scheduler that when faulted later will be faulted onto the
node the CPU is running on.  In itself this does nothing useful but any
placement policy will fundamentally depend on receiving hints on placement
from fault context and doing something intelligent about it.

Signed-off-by: Mel Gorman <[email protected]>
Acked-by: Rik van Riel <[email protected]>
This commit is contained in:
Peter Zijlstra 2012-10-25 14:16:43 +02:00 • committed by Mel Gorman
commit cbee9f88ec
11 changed files with 224 additions and 4 deletions
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1
arch/sh/mm/Kconfig
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@ -111,6 +111,7 @@ config VSYSCALL
config NUMA
bool "Non Uniform Memory Access (NUMA) Support"
depends on MMU && SYS_SUPPORTS_NUMA && EXPERIMENTAL
select ARCH_WANT_NUMA_VARIABLE_LOCALITY
default n
help
Some SH systems have many various memories scattered around