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authorYinghai Lu <yinghai@kernel.org>2010-08-25 13:39:16 -0700
committerH. Peter Anvin <hpa@zytor.com>2010-08-27 11:10:54 -0700
commitedbe7d23b4482e7f33179290bcff3b1feae1c5f3 (patch)
tree2bf55fc2cb94e32fdd79018e9e04b55cbe8d49d9 /mm/page_alloc.c
parent88ba088c18457caaf8d2e5f8d36becc731a3d4f6 (diff)
downloadlwn-edbe7d23b4482e7f33179290bcff3b1feae1c5f3.tar.gz
lwn-edbe7d23b4482e7f33179290bcff3b1feae1c5f3.zip
memblock: Add find_memory_core_early()
According to node range in early_node_map[] with __memblock_find_in_range to find free range. Will be used by memblock_x86_find_in_range_node() memblock_x86_find_in_range_node will be used to find right buffer for NODE_DATA Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 9bd339eb04c6..8c9b34674d83 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -21,6 +21,7 @@
#include <linux/pagemap.h>
#include <linux/jiffies.h>
#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/compiler.h>
#include <linux/kernel.h>
#include <linux/kmemcheck.h>
@@ -3612,6 +3613,41 @@ void __init free_bootmem_with_active_regions(int nid,
}
}
+#ifdef CONFIG_HAVE_MEMBLOCK
+u64 __init find_memory_core_early(int nid, u64 size, u64 align,
+ u64 goal, u64 limit)
+{
+ int i;
+
+ /* Need to go over early_node_map to find out good range for node */
+ for_each_active_range_index_in_nid(i, nid) {
+ u64 addr;
+ u64 ei_start, ei_last;
+ u64 final_start, final_end;
+
+ ei_last = early_node_map[i].end_pfn;
+ ei_last <<= PAGE_SHIFT;
+ ei_start = early_node_map[i].start_pfn;
+ ei_start <<= PAGE_SHIFT;
+
+ final_start = max(ei_start, goal);
+ final_end = min(ei_last, limit);
+
+ if (final_start >= final_end)
+ continue;
+
+ addr = memblock_find_in_range(final_start, final_end, size, align);
+
+ if (addr == MEMBLOCK_ERROR)
+ continue;
+
+ return addr;
+ }
+
+ return MEMBLOCK_ERROR;
+}
+#endif
+
int __init add_from_early_node_map(struct range *range, int az,
int nr_range, int nid)
{