linux-kernel - [tip:x86/urgent] x86/mm/srat: Print non-volatile flag in SRAT

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Message-ID: <tip-31e09b18c863718939e3e9c30eee55f9011d85ee@git.kernel.org>
Date:	Wed, 2 Sep 2015 00:36:34 -0700
From:	tip-bot for Linda Knippers <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, mingo@...nel.org, tglx@...utronix.de,
	linda.knippers@...com, peterz@...radead.org, hpa@...or.com
Subject: [tip:x86/urgent] x86/mm/srat: Print non-volatile flag in SRAT

Commit-ID:  31e09b18c863718939e3e9c30eee55f9011d85ee
Gitweb:     http://git.kernel.org/tip/31e09b18c863718939e3e9c30eee55f9011d85ee
Author:     Linda Knippers <linda.knippers@...com>
AuthorDate: Tue, 1 Sep 2015 15:41:55 -0400
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 2 Sep 2015 09:33:25 +0200

x86/mm/srat: Print non-volatile flag in SRAT

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 <linda.knippers@...com>
Acked-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/20150901194154.GA4939@ljkz400
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 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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