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From: Wei Yang <richard.weiyang@gmail.com>
To: kirill@shutemov.name, bp@alien8.de, tglx@linutronix.de,
	mingo@redhat.com, hpa@zytor.com, tj@kernel.org
Cc: linux-kernel@vger.kernel.org, Wei Yang <richard.weiyang@gmail.com>
Subject: [PATCH 3/3] x86/numa_emulation: restructures numa_nodes_parsed from emulated nodes
Date: Tue, 11 Apr 2017 00:56:52 +0800	[thread overview]
Message-ID: <20170410165652.50250-4-richard.weiyang@gmail.com> (raw)
In-Reply-To: <20170410165652.50250-1-richard.weiyang@gmail.com>

By emulating numa, it may contains more or less nodes than physical nodes.
In numa_emulation(), numa_meminfo/numa_distance/__apicid_to_node is
restructured according to emulated nodes, except numa_nodes_parsed.

This patch restructures numa_nodes_parsed from emulated nodes.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
 arch/x86/mm/numa_emulation.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/x86/mm/numa_emulation.c b/arch/x86/mm/numa_emulation.c
index a6d01931b9a1..14f075fc4cc5 100644
--- a/arch/x86/mm/numa_emulation.c
+++ b/arch/x86/mm/numa_emulation.c
@@ -391,6 +391,13 @@ void __init numa_emulation(struct numa_meminfo *numa_meminfo, int numa_dist_cnt)
 	/* commit */
 	*numa_meminfo = ei;
 
+	/* Make sure numa_nodes_parsed only contains emulated nodes */
+	numa_nodes_parsed = NODE_MASK_NONE;
+	for (i = 0; i < ARRAY_SIZE(ei.blk); i++)
+		if (ei.blk[i].start != ei.blk[i].end &&
+		    ei.blk[i].nid != NUMA_NO_NODE)
+			node_set(ei.blk[i].nid, numa_nodes_parsed);
+
 	/*
 	 * Transform __apicid_to_node table to use emulated nids by
 	 * reverse-mapping phys_nid.  The maps should always exist but fall
-- 
2.11.0

  parent reply	other threads:[~2017-04-10 16:57 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-10 16:56 [PATCH 0/3] Refine numa_emulation Wei Yang
2017-04-10 16:56 ` [PATCH 1/3] x86/numa_emulation: fix potential memory leak Wei Yang
2017-04-11  0:16   ` David Rientjes
2017-04-10 16:56 ` [PATCH 2/3] x86/numa_emulation: assign physnode_mask directly from numa_nodes_parsed Wei Yang
2017-04-11  0:26   ` David Rientjes
2017-04-11  1:42     ` Wei Yang
2017-05-01 21:37       ` David Rientjes
2017-05-02 13:06         ` Wei Yang
2017-04-10 16:56 ` Wei Yang [this message]
2017-04-11  0:36   ` [PATCH 3/3] x86/numa_emulation: restructures numa_nodes_parsed from emulated nodes David Rientjes
2017-04-11  1:44     ` Wei Yang

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