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Subject[RFC][patch 2/5] mm: Node-setup agnostic free_bootmem()
Make free_bootmem() look up the node holding the specified address
range which lets it work transparently on single-node and multi-node
configurations.

If the address range exceeds the node range, it well be marked free
across node boundaries, too.

Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
CC: Ingo Molnar <mingo@elte.hu>
CC: Andi Kleen <andi@firstfloor.org>
CC: Yinghai Lu <yhlu.kernel@gmail.com>
CC: Yasunori Goto <y-goto@jp.fujitsu.com>
CC: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
CC: Christoph Lameter <clameter@sgi.com>
CC: Andrew Morton <akpm@linux-foundation.org>
---
mm/bootmem.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)

Index: tree-linus/mm/bootmem.c
===================================================================
--- tree-linus.orig/mm/bootmem.c
+++ tree-linus/mm/bootmem.c
@@ -421,7 +421,32 @@ int __init reserve_bootmem(unsigned long

void __init free_bootmem(unsigned long addr, unsigned long size)
{
- free_bootmem_core(NODE_DATA(0)->bdata, addr, size);
+ bootmem_data_t *bdata;
+ unsigned long pos = addr;
+ unsigned long partsize = size;
+
+ list_for_each_entry(bdata, &bdata_list, list) {
+ unsigned long remainder = 0;
+
+ if (pos < bdata->node_boot_start)
+ continue;
+
+ if (PFN_DOWN(pos + partsize) > bdata->node_low_pfn) {
+ remainder = PFN_DOWN(pos + partsize) - bdata->node_low_pfn;
+ partsize -= remainder;
+ }
+
+ free_bootmem_core(bdata, pos, partsize);
+
+ if (!remainder)
+ return;
+
+ pos = PFN_PHYS(bdata->node_low_pfn + 1);
+ }
+ printk(KERN_ERR "free_bootmem: request: addr=%lx, size=%lx, "
+ "state: pos=%lx, partsize=%lx\n", addr, size,
+ pos, partsize);
+ BUG();
}

unsigned long __init free_all_bootmem(void)
--



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