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arm64: mm: enable CONFIG_HOLES_IN_ZONE for NUMA
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The NUMA code may get confused by the presence of NOMAP regions within
zones, resulting in spurious BUG() checks where the node id deviates
from the containing zone's node id.

Since the kernel has no business reasoning about node ids of pages it
does not own in the first place, enable CONFIG_HOLES_IN_ZONE to ensure
that such pages are disregarded.

Acked-by: Robert Richter <[email protected]>
Signed-off-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
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Ard Biesheuvel authored and wildea01 committed Feb 6, 2017
1 parent c0bfc54 commit 6d526ee
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4 changes: 4 additions & 0 deletions arch/arm64/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -625,6 +625,10 @@ config NEED_PER_CPU_EMBED_FIRST_CHUNK
def_bool y
depends on NUMA

config HOLES_IN_ZONE
def_bool y
depends on NUMA

source kernel/Kconfig.preempt
source kernel/Kconfig.hz

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