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authorTang Chen <tangchen@cn.fujitsu.com>2013-02-22 16:33:42 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-23 17:50:14 -0800
commitfb06bc8e5f42f38c011de0e59481f464a82380f6 (patch)
treeac55622da0b397e57cdb426f634441939187f99d /mm/memblock.c
parent42f47e27e761fee07da69e04612ec7dd0d490edd (diff)
downloadop-kernel-dev-fb06bc8e5f42f38c011de0e59481f464a82380f6.zip
op-kernel-dev-fb06bc8e5f42f38c011de0e59481f464a82380f6.tar.gz
page_alloc: bootmem limit with movablecore_map
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 <tangchen@cn.fujitsu.com> Reviewed-by: Wen Congyang <wency@cn.fujitsu.com> Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com> Tested-by: Lin Feng <linfeng@cn.fujitsu.com> Cc: Wu Jianguo <wujianguo@huawei.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memblock.c')
-rw-r--r--mm/memblock.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index b8d9147..c83ff97 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -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;
}
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