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Date: Thu, 4 Jun 2015 20:57:57 +0800
From: Xishi Qiu <qiuxishi@...wei.com>
To: Xishi Qiu <qiuxishi@...wei.com>,
Andrew Morton <akpm@...ux-foundation.org>,
<nao.horiguchi@...il.com>, Yinghai Lu <yinghai@...nel.org>,
"H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>, <mingo@...e.hu>,
Xiexiuqi <xiexiuqi@...wei.com>,
Hanjun Guo <guohanjun@...wei.com>,
"Luck, Tony" <tony.luck@...el.com>
CC: Linux MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [RFC PATCH 02/12] mm: introduce mirror_info
This patch introduces a new struct called "mirror_info", it is used to storage
the mirror address range which reported by EFI or ACPI.
TBD: call add_mirror_info() to fill it.
Signed-off-by: Xishi Qiu <qiuxishi@...wei.com>
---
arch/x86/mm/numa.c | 3 +++
include/linux/mmzone.h | 15 +++++++++++++++
mm/page_alloc.c | 33 +++++++++++++++++++++++++++++++++
3 files changed, 51 insertions(+)
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 4053bb5..781fd68 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -619,6 +619,9 @@ static int __init numa_init(int (*init_func)(void))
/* In case that parsing SRAT failed. */
WARN_ON(memblock_clear_hotplug(0, ULLONG_MAX));
numa_reset_distance();
+#ifdef CONFIG_MEMORY_MIRROR
+ memset(&mirror_info, 0, sizeof(mirror_info));
+#endif
ret = init_func();
if (ret < 0)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 54d74f6..1fae07b 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -69,6 +69,21 @@ enum {
# define is_migrate_cma(migratetype) false
#endif
+#ifdef CONFIG_MEMORY_MIRROR
+struct numa_mirror_info {
+ int node;
+ unsigned long start;
+ unsigned long size;
+};
+
+struct mirror_info {
+ int count;
+ struct numa_mirror_info info[MAX_NUMNODES];
+};
+
+extern struct mirror_info mirror_info;
+#endif
+
#define for_each_migratetype_order(order, type) \
for (order = 0; order < MAX_ORDER; order++) \
for (type = 0; type < MIGRATE_TYPES; type++)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ebffa0e..41a95a7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -210,6 +210,10 @@ static char * const zone_names[MAX_NR_ZONES] = {
int min_free_kbytes = 1024;
int user_min_free_kbytes = -1;
+#ifdef CONFIG_MEMORY_MIRROR
+struct mirror_info mirror_info;
+#endif
+
static unsigned long __meminitdata nr_kernel_pages;
static unsigned long __meminitdata nr_all_pages;
static unsigned long __meminitdata dma_reserve;
@@ -545,6 +549,31 @@ static inline int page_is_buddy(struct page *page, struct page *buddy,
return 0;
}
+#ifdef CONFIG_MEMORY_MIRROR
+static void __init add_mirror_info(int node,
+ unsigned long start, unsigned long size)
+{
+ mirror_info.info[mirror_info.count].node = node;
+ mirror_info.info[mirror_info.count].start = start;
+ mirror_info.info[mirror_info.count].size = size;
+
+ mirror_info.count++;
+}
+
+static void __init print_mirror_info(void)
+{
+ int i;
+
+ printk("Mirror info\n");
+ for (i = 0; i < mirror_info.count; i++)
+ printk(" node %3d: [mem %#010lx-%#010lx]\n",
+ mirror_info.info[i].node,
+ mirror_info.info[i].start,
+ mirror_info.info[i].start +
+ mirror_info.info[i].size - 1);
+}
+#endif
+
/*
* Freeing function for a buddy system allocator.
*
@@ -5438,6 +5467,10 @@ void __init free_area_init_nodes(unsigned long *max_zone_pfn)
(u64)zone_movable_pfn[i] << PAGE_SHIFT);
}
+#ifdef CONFIG_MEMORY_MIRROR
+ print_mirror_info();
+#endif
+
/* Print out the early node map */
pr_info("Early memory node ranges\n");
for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, &nid)
--
2.0.0
--
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