linux-kernel - [PATCH 6/6] x86/numa: build node fallback info after setting up node to cpumask map

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Date:   Sun, 24 Feb 2019 20:34:09 +0800
From:   Pingfan Liu <kernelfans@...il.com>
To:     x86@...nel.org, linux-mm@...ck.org
Cc:     Pingfan Liu <kernelfans@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...e.de>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andy Lutomirski <luto@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Petr Tesarik <ptesarik@...e.cz>,
        Michal Hocko <mhocko@...e.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Jonathan Corbet <corbet@....net>,
        Nicholas Piggin <npiggin@...il.com>,
        Daniel Vacek <neelx@...hat.com>, linux-kernel@...r.kernel.org
Subject: [PATCH 6/6] x86/numa: build node fallback info after setting up node to cpumask map

After the previous patches, on x86, it is safe to call
memblock_build_node_order() after init_cpu_to_node(), which has set up node
to cpumask map. So calling memblock_build_node_order() to feed memblock with
numa node fall back info.

Signed-off-by: Pingfan Liu <kernelfans@...il.com>
CC: Thomas Gleixner <tglx@...utronix.de>
CC: Ingo Molnar <mingo@...hat.com>
CC: Borislav Petkov <bp@...en8.de>
CC: "H. Peter Anvin" <hpa@...or.com>
CC: Dave Hansen <dave.hansen@...ux.intel.com>
CC: Vlastimil Babka <vbabka@...e.cz>
CC: Mike Rapoport <rppt@...ux.vnet.ibm.com>
CC: Andrew Morton <akpm@...ux-foundation.org>
CC: Mel Gorman <mgorman@...e.de>
CC: Joonsoo Kim <iamjoonsoo.kim@....com>
CC: Andy Lutomirski <luto@...nel.org>
CC: Andi Kleen <ak@...ux.intel.com>
CC: Petr Tesarik <ptesarik@...e.cz>
CC: Michal Hocko <mhocko@...e.com>
CC: Stephen Rothwell <sfr@...b.auug.org.au>
CC: Jonathan Corbet <corbet@....net>
CC: Nicholas Piggin <npiggin@...il.com>
CC: Daniel Vacek <neelx@...hat.com>
CC: linux-kernel@...r.kernel.org
---
 arch/x86/kernel/setup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 3d872a5..3ec1a6e 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1245,6 +1245,8 @@ void __init setup_arch(char **cmdline_p)
 	prefill_possible_map();
 
 	init_cpu_to_node();
+	/* node to cpumask map is ready */
+	memblock_build_node_order();
 
 	io_apic_init_mappings();
 
-- 
2.7.4