Commit-ID: edbe7d23b4482e7f33179290bcff3b1feae1c5f3
Gitweb: http://git.kernel.org/tip/edbe7d23b4482e7f33179290bcff3b1feae1c5f3
Author: Yinghai Lu <yinghai@xxxxxxxxxx>
AuthorDate: Wed, 25 Aug 2010 13:39:16 -0700
Committer: H. Peter Anvin <hpa@xxxxxxxxx>
CommitDate: Fri, 27 Aug 2010 11:10:54 -0700
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@xxxxxxxxxx>
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx>
---
include/linux/mm.h | 2 ++
mm/page_alloc.c | 36 ++++++++++++++++++++++++++++++++++++
2 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index a2b4804..993e85f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1164,6 +1164,8 @@ extern void free_bootmem_with_active_regions(int nid,
unsigned long max_low_pfn);
int add_from_early_node_map(struct range *range, int az,
int nr_range, int nid);
+u64 __init find_memory_core_early(int nid, u64 size, u64 align,
+ u64 goal, u64 limit);
void *__alloc_memory_core_early(int nodeid, u64 size, u64 align,
u64 goal, u64 limit);
typedef int (*work_fn_t)(unsigned long, unsigned long, void *);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 9bd339e..8c9b346 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)
{
--
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