linux-kernel - [PATCH] arm64: Kconfig: Enable NODES_SPAN_OTHER

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Message-ID: <1561387098-23692-1-git-send-email-Hoan@os.amperecomputing.com>
Date:   Mon, 24 Jun 2019 14:38:28 +0000
From:   Hoan Tran OS <hoan@...amperecomputing.com>
To:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Open Source Review <OpenSourceReview@...erecomputing.com>,
        Hoan Tran OS <hoan@...amperecomputing.com>
Subject: [PATCH] arm64: Kconfig: Enable NODES_SPAN_OTHER_NODES config for NUMA

Some NUMA nodes have memory ranges that span other nodes.
Even though a pfn is valid and between a node's start and end pfns,
it may not reside on that node.

This patch enables NODES_SPAN_OTHER_NODES config for NUMA to support
this type of NUMA layout.

Signed-off-by: Hoan Tran <Hoan@...amperecomputing.com>
---
 arch/arm64/Kconfig | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 697ea05..21fc168 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -873,6 +873,13 @@ config NEED_PER_CPU_EMBED_FIRST_CHUNK
 config HOLES_IN_ZONE
 	def_bool y
 
+# Some NUMA nodes have memory ranges that span other nodes.
+# Even though a pfn is valid and between a node's start and end pfns,
+# it may not reside on that node.
+config NODES_SPAN_OTHER_NODES
+	def_bool y
+	depends on ACPI_NUMA
+
 source "kernel/Kconfig.hz"
 
 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
-- 
2.7.4