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page_alloc: bootmem limit with movablecore_map

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Ensure the bootmem will not allocate memory from areas that may be
ZONE_MOVABLE.  The map info is from movablecore_map boot option.

Signed-off-by: Tang Chen <[email protected]>
Reviewed-by: Wen Congyang <[email protected]>
Reviewed-by: Lai Jiangshan <[email protected]>
Tested-by: Lin Feng <[email protected]>
Cc: Wu Jianguo <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Tang Chen 2013-02-22 16:33:42 -08:00 • committed by Linus Torvalds
commit fb06bc8e5f
2 changed files with 18 additions and 1 deletions
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18
mm/memblock.c
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@ -101,6 +101,7 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
{
phys_addr_t this_start, this_end, cand;
u64 i;
int curr = movablemem_map.nr_map - 1;
/* pump up @end */
if (end == MEMBLOCK_ALLOC_ACCESSIBLE)
@ -114,13 +115,28 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start,
this_start = clamp(this_start, start, end);
this_end = clamp(this_end, start, end);
if (this_end < size)
restart:
if (this_end <= this_start || this_end < size)
continue;
for (; curr >= 0; curr--) {
if ((movablemem_map.map[curr].start_pfn << PAGE_SHIFT)
< this_end)
break;
}
cand = round_down(this_end - size, align);
if (curr >= 0 &&
cand < movablemem_map.map[curr].end_pfn << PAGE_SHIFT) {
this_end = movablemem_map.map[curr].start_pfn
<< PAGE_SHIFT;
goto restart;
}
if (cand >= this_start)
return cand;
}
return 0;
}