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From: Linda Knippers <>
Subject: [PATCH v2] arch/x86/mm/srat: Print non-volatile flag in SRAT
Date: Tue, 1 Sep 2015 15:41:55 -0400
Message-ID: <20150901194154.GA4939@ljkz400> (raw)

With the addition of NVDIMM support, a question came up as to whether
NVDIMM ranges should be in the SRAT with this bit set.  I think the
consensus was no because the ranges are in the NFIT with proximity
domain information there.

ACPI is not clear on the meaning of this bit in the SRAT.
If someone is setting it, we might want to ask them what they expect
to happen with it.

Right now this bit is only printed if all the ACPI debug information is
turned on.  

Signed-off-by: Linda Knippers <>
 arch/x86/mm/srat.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/srat.c b/arch/x86/mm/srat.c
index 66338a6..c2aea63 100644
--- a/arch/x86/mm/srat.c
+++ b/arch/x86/mm/srat.c
@@ -192,10 +192,11 @@ acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
 	node_set(node, numa_nodes_parsed);
-	pr_info("SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]%s\n",
+	pr_info("SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]%s%s\n",
 		node, pxm,
 		(unsigned long long) start, (unsigned long long) end - 1,
-		hotpluggable ? " hotplug" : "");
+		hotpluggable ? " hotplug" : "",
+		ma->flags & ACPI_SRAT_MEM_NON_VOLATILE ? " non-volatile" : "");
 	/* Mark hotplug range in memblock. */
 	if (hotpluggable && memblock_mark_hotplug(start, ma->length))

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Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-01 19:41 Linda Knippers [this message]
2015-09-02  7:36 ` [tip:x86/urgent] x86/mm/srat: " tip-bot for Linda Knippers

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