memblock: Add optional region->nid
From 83103b92f3234ec830852bbc5c45911bd6cbdb20 Mon Sep 17 00:00:00 2001
From: Tejun Heo <[email protected]>
Date: Thu, 14 Jul 2011 11:22:16 +0200
Add optional region->nid which can be enabled by arch using
CONFIG_HAVE_MEMBLOCK_NODE_MAP. When enabled, memblock also carries
NUMA node information and replaces early_node_map[].
Newly added memblocks have MAX_NUMNODES as nid. Arch can then call
memblock_set_node() to set node information. memblock takes care of
merging and node affine allocations w.r.t. node information.
When MEMBLOCK_NODE_MAP is enabled, early_node_map[], related data
structures and functions to manipulate and iterate it are disabled.
memblock version of __next_mem_pfn_range() is provided such that
for_each_mem_pfn_range() behaves the same and its users don't have to
be updated.
-v2: Yinghai spotted section mismatch caused by missing
__init_memblock in memblock_set_node(). Fixed.
Signed-off-by: Tejun Heo <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Cc: Yinghai Lu <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8ab5e5e..3c7ea45 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -182,28 +182,31 @@
static unsigned long __meminitdata dma_reserve;
#ifdef CONFIG_ARCH_POPULATES_NODE_MAP
- /*
- * MAX_ACTIVE_REGIONS determines the maximum number of distinct
- * ranges of memory (RAM) that may be registered with add_active_range().
- * Ranges passed to add_active_range() will be merged if possible
- * so the number of times add_active_range() can be called is
- * related to the number of nodes and the number of holes
- */
- #ifdef CONFIG_MAX_ACTIVE_REGIONS
- /* Allow an architecture to set MAX_ACTIVE_REGIONS to save memory */
- #define MAX_ACTIVE_REGIONS CONFIG_MAX_ACTIVE_REGIONS
- #else
- #if MAX_NUMNODES >= 32
- /* If there can be many nodes, allow up to 50 holes per node */
- #define MAX_ACTIVE_REGIONS (MAX_NUMNODES*50)
+ #ifndef CONFIG_HAVE_MEMBLOCK_NODE_MAP
+ /*
+ * MAX_ACTIVE_REGIONS determines the maximum number of distinct ranges
+ * of memory (RAM) that may be registered with add_active_range().
+ * Ranges passed to add_active_range() will be merged if possible so
+ * the number of times add_active_range() can be called is related to
+ * the number of nodes and the number of holes
+ */
+ #ifdef CONFIG_MAX_ACTIVE_REGIONS
+ /* Allow an architecture to set MAX_ACTIVE_REGIONS to save memory */
+ #define MAX_ACTIVE_REGIONS CONFIG_MAX_ACTIVE_REGIONS
#else
- /* By default, allow up to 256 distinct regions */
- #define MAX_ACTIVE_REGIONS 256
+ #if MAX_NUMNODES >= 32
+ /* If there can be many nodes, allow up to 50 holes per node */
+ #define MAX_ACTIVE_REGIONS (MAX_NUMNODES*50)
+ #else
+ /* By default, allow up to 256 distinct regions */
+ #define MAX_ACTIVE_REGIONS 256
+ #endif
#endif
- #endif
- static struct node_active_region __meminitdata early_node_map[MAX_ACTIVE_REGIONS];
- static int __meminitdata nr_nodemap_entries;
+ static struct node_active_region __meminitdata early_node_map[MAX_ACTIVE_REGIONS];
+ static int __meminitdata nr_nodemap_entries;
+#endif /* !CONFIG_HAVE_MEMBLOCK_NODE_MAP */
+
static unsigned long __meminitdata arch_zone_lowest_possible_pfn[MAX_NR_ZONES];
static unsigned long __meminitdata arch_zone_highest_possible_pfn[MAX_NR_ZONES];
static unsigned long __initdata required_kernelcore;
@@ -4268,6 +4271,7 @@
}
#endif
+#ifndef CONFIG_HAVE_MEMBLOCK_NODE_MAP
/*
* Common iterator interface used to define for_each_mem_pfn_range().
*/
@@ -4456,6 +4460,11 @@
sizeof(struct node_active_region),
cmp_node_active_region, NULL);
}
+#else /* !CONFIG_HAVE_MEMBLOCK_NODE_MAP */
+static inline void sort_node_map(void)
+{
+}
+#endif
/**
* node_map_pfn_alignment - determine the maximum internode alignment
