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x86: replace shrink_active_range() with remove_active_range()

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in case we have kva before ramdisk on a node, we still need to use
those ranges.

v2: reserve_early kva ram area, in case there are holes in highmem, to avoid
    those area could be treat as free high pages.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
2008-06-13 19:08:52 -07:00
committed by Ingo Molnar
parent d2dbf34332
commit cc1050bafe
3 changed files with 48 additions and 27 deletions
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29
mm/page_alloc.c
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@@ -3552,30 +3552,47 @@ void __init add_active_range(unsigned int nid, unsigned long start_pfn,
}
/**
* shrink_active_range - Shrink an existing registered range of PFNs
* remove_active_range - Shrink an existing registered range of PFNs
* @nid: The node id the range is on that should be shrunk
* @new_end_pfn: The new PFN of the range
* @start_pfn: The new PFN of the range
* @end_pfn: The new PFN of the range
*
* i386 with NUMA use alloc_remap() to store a node_mem_map on a local node.
* The map is kept near the end physical page range that has already been
* registered. This function allows an arch to shrink an existing registered
* range.
*/
void __init shrink_active_range(unsigned int nid, unsigned long new_end_pfn)
void __init remove_active_range(unsigned int nid, unsigned long start_pfn,
unsigned long end_pfn)
{
int i, j;
int removed = 0;
printk(KERN_DEBUG "remove_active_range (%d, %lu, %lu)\n",
nid, start_pfn, end_pfn);
/* Find the old active region end and shrink */
for_each_active_range_index_in_nid(i, nid) {
if (early_node_map[i].start_pfn >= new_end_pfn) {
if (early_node_map[i].start_pfn >= start_pfn &&
early_node_map[i].end_pfn <= end_pfn) {
/* clear it */
early_node_map[i].start_pfn = 0;
early_node_map[i].end_pfn = 0;
removed = 1;
continue;
}
if (early_node_map[i].end_pfn > new_end_pfn) {
early_node_map[i].end_pfn = new_end_pfn;
if (early_node_map[i].start_pfn < start_pfn &&
early_node_map[i].end_pfn > start_pfn) {
unsigned long temp_end_pfn = early_node_map[i].end_pfn;
early_node_map[i].end_pfn = start_pfn;
if (temp_end_pfn > end_pfn)
add_active_range(nid, end_pfn, temp_end_pfn);
continue;
}
if (early_node_map[i].start_pfn >= start_pfn &&
early_node_map[i].end_pfn > end_pfn &&
early_node_map[i].start_pfn < end_pfn) {
early_node_map[i].start_pfn = end_pfn;
continue;
}
}