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From: Huang Pei <huangpei@loongson.cn>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>, ambrosehua@gmail.com
Cc: Bibo Mao <maobibo@loongson.cn>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-mips@vger.kernel.org, linux-arch@vger.kernel.org,
	linux-mm@kvack.org, Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Paul Burton <paulburton@kernel.org>,
	Li Xuefeng <lixuefeng@loongson.cn>,
	Yang Tiezhu <yangtiezhu@loongson.cn>,
	Gao Juxin <gaojuxin@loongson.cn>,
	Huacai Chen <chenhuacai@loongson.cn>,
	Jinyang He <hejinyang@loongson.cn>
Subject: [PATCH 3/3] MIPS: loongson64: alloc pglist_data at run time
Date: Fri,  5 Mar 2021 18:03:10 +0800	[thread overview]
Message-ID: <20210305100310.26627-4-huangpei@loongson.cn> (raw)
In-Reply-To: <20210305100310.26627-1-huangpei@loongson.cn>

It can make some metadata of MM, like pglist_data and zone
NUMA-aware

Signed-off-by: Huang Pei <huangpei@loongson.cn>
---
 arch/mips/loongson64/numa.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/arch/mips/loongson64/numa.c b/arch/mips/loongson64/numa.c
index cf9459f79f9b..afafd367cb38 100644
--- a/arch/mips/loongson64/numa.c
+++ b/arch/mips/loongson64/numa.c
@@ -26,7 +26,6 @@
 #include <asm/wbflush.h>
 #include <boot_param.h>
 
-static struct pglist_data prealloc__node_data[MAX_NUMNODES];
 unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
 EXPORT_SYMBOL(__node_distances);
 struct pglist_data *__node_data[MAX_NUMNODES];
@@ -151,8 +150,12 @@ static void __init szmem(unsigned int node)
 
 static void __init node_mem_init(unsigned int node)
 {
+	struct pglist_data *nd;
 	unsigned long node_addrspace_offset;
 	unsigned long start_pfn, end_pfn;
+	unsigned long nd_pa;
+	int tnid;
+	const size_t nd_size = roundup(sizeof(pg_data_t), SMP_CACHE_BYTES);
 
 	node_addrspace_offset = nid_to_addrbase(node);
 	pr_info("Node%d's addrspace_offset is 0x%lx\n",
@@ -162,8 +165,16 @@ static void __init node_mem_init(unsigned int node)
 	pr_info("Node%d: start_pfn=0x%lx, end_pfn=0x%lx\n",
 		node, start_pfn, end_pfn);
 
-	__node_data[node] = prealloc__node_data + node;
-
+	nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, node);
+	if (!nd_pa)
+		panic("Cannot allocate %zu bytes for node %d data\n",
+		      nd_size, node);
+	nd = __va(nd_pa);
+	memset(nd, 0, sizeof(struct pglist_data));
+	tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
+	if (tnid != node)
+		pr_info("NODE_DATA(%d) on node %d\n", node, tnid);
+	__node_data[node] = nd;
 	NODE_DATA(node)->node_start_pfn = start_pfn;
 	NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
 
-- 
2.17.1


      parent reply	other threads:[~2021-03-05 10:04 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-05 10:03 [PATCH V2]: MIPS work Huang Pei
2021-03-05 10:03 ` [PATCH 1/3] MIPS: sync arrangement of pt_regs with user_pt_regs and regoffset_table Huang Pei
2021-03-06  7:47   ` Thomas Bogendoerfer
2021-03-07  1:36     ` 黄沛
2021-03-05 10:03 ` [PATCH 2/3] MIPS: clean up CONFIG_MIPS_PGD_C0_CONTEXT handling Huang Pei
2021-03-05 10:03 ` Huang Pei [this message]

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