linux-kernel - [PATCH 19/21] x86, numa: Save nid when reserve memory into memblock.reserved[].

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Message-Id: <1374220774-29974-20-git-send-email-tangchen@cn.fujitsu.com>
Date:	Fri, 19 Jul 2013 15:59:32 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	izumi.taku@...fujitsu.com, mgorman@...e.de, minchan@...nel.org,
	mina86@...a86.com, gong.chen@...ux.intel.com,
	vasilis.liaskovitis@...fitbricks.com, lwoodman@...hat.com,
	riel@...hat.com, jweiner@...hat.com, prarit@...hat.com,
	zhangyanfei@...fujitsu.com, yanghy@...fujitsu.com
Cc:	x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-acpi@...r.kernel.org
Subject: [PATCH 19/21] x86, numa: Save nid when reserve memory into memblock.reserved[].

We have introduced numa_sync_memblock_nid to synchronize nid info in
memblock.reserved[] and numa_meminfo. But memblock_reserve() always
reserve memory with MAX_NUMNODES, even after numa_meminfo has been
initialized.

So this patch improves memblock_reserve() to reserve memory with
correct nid.

Reported-by: Vasilis Liaskovitis <vasilis.liaskovitis@...fitbricks.com>
Signed-off-by: Tang Chen <tangchen@...fujitsu.com>
---
 include/linux/memblock.h |    1 +
 include/linux/mm.h       |    9 +++++++++
 mm/memblock.c            |   11 +++++++++--
 3 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 8d71795..d520015 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -63,6 +63,7 @@ int memblock_remove(phys_addr_t base, phys_addr_t size);
 int memblock_free(phys_addr_t base, phys_addr_t size);
 int memblock_reserve(phys_addr_t base, phys_addr_t size);
 int memblock_reserve_hotpluggable(phys_addr_t base, phys_addr_t size, int nid);
+int memblock_reserve_node(phys_addr_t base, phys_addr_t size, int nid);
 void memblock_free_hotpluggable(void);
 void memblock_trim_memory(phys_addr_t align);
 
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e0c8528..baa1aac 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1665,6 +1665,15 @@ unsigned long change_prot_numa(struct vm_area_struct *vma,
 			unsigned long start, unsigned long end);
 #endif
 
+#ifdef CONFIG_NUMA
+int __init early_numa_find_range_nid(u64 start, u64 size);
+#else
+static inline int __init early_numa_find_range_nid(u64 start, u64 size)
+{
+	return 0;
+}
+#endif
+
 struct vm_area_struct *find_extend_vma(struct mm_struct *, unsigned long addr);
 int remap_pfn_range(struct vm_area_struct *, unsigned long addr,
 			unsigned long pfn, unsigned long size, pgprot_t);
diff --git a/mm/memblock.c b/mm/memblock.c
index 631b727..1f5dc12 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -597,12 +597,19 @@ static int __init_memblock memblock_reserve_region(phys_addr_t base,
 	return memblock_add_region(_rgn, base, size, nid, flags);
 }
 
-int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size)
+int __init_memblock memblock_reserve_node(phys_addr_t base,
+					  phys_addr_t size, int nid)
 {
-	return memblock_reserve_region(base, size, MAX_NUMNODES,
+	return memblock_reserve_region(base, size, nid,
 				       MEMBLK_FLAGS_DEFAULT);
 }
 
+int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size)
+{
+	int nid = early_numa_find_range_nid(base, size);
+	return memblock_reserve_node(base, size, nid);
+}
+
 int __init_memblock memblock_reserve_hotpluggable(phys_addr_t base,
 						  phys_addr_t size, int nid)
 {
-- 
1.7.1

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