[PATCH v2 1/1] page_alloc: Bootmem limit with movablecore_map
From: Tang Chen <hidden>
Date: 2013-01-21 07:26:18
Also in:
lkml
Subsystem:
memblock and memory management initialization, memory management, the rest · Maintainers:
Mike Rapoport, Andrew Morton, Linus Torvalds
This patch make sure 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 <redacted> Reviewed-by: Wen Congyang <redacted> Reviewed-by: Lai Jiangshan <redacted> Tested-by: Lin Feng <redacted> --- include/linux/memblock.h | 2 + mm/memblock.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index d452ee1..ac52bbc 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h@@ -60,6 +60,8 @@ int memblock_reserve(phys_addr_t base, phys_addr_t size); void memblock_trim_memory(phys_addr_t align); #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP +extern struct movablecore_map movablecore_map; + void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, unsigned long *out_end_pfn, int *out_nid);
diff --git a/mm/memblock.c b/mm/memblock.c
index 88adc8a..0218231 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c@@ -92,9 +92,58 @@ static long __init_memblock memblock_overlaps_region(struct memblock_type *type, * * Find @size free area aligned to @align in the specified range and node. * + * If we have CONFIG_HAVE_MEMBLOCK_NODE_MAP defined, we need to check if the + * memory we found if not in hotpluggable ranges. + * * RETURNS: * Found address on success, %0 on failure. */ +#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP +phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start, + phys_addr_t end, phys_addr_t size, + phys_addr_t align, int nid) +{ + phys_addr_t this_start, this_end, cand; + u64 i; + int curr = movablecore_map.nr_map - 1; + + /* pump up @end */ + if (end == MEMBLOCK_ALLOC_ACCESSIBLE) + end = memblock.current_limit; + + /* avoid allocating the first page */ + start = max_t(phys_addr_t, start, PAGE_SIZE); + end = max(start, end); + + for_each_free_mem_range_reverse(i, nid, &this_start, &this_end, NULL) { + this_start = clamp(this_start, start, end); + this_end = clamp(this_end, start, end); + +restart: + if (this_end <= this_start || this_end < size) + continue; + + for (; curr >= 0; curr--) { + if ((movablecore_map.map[curr].start_pfn << PAGE_SHIFT) + < this_end) + break; + } + + cand = round_down(this_end - size, align); + if (curr >= 0 && + cand < movablecore_map.map[curr].end_pfn << PAGE_SHIFT) { + this_end = movablecore_map.map[curr].start_pfn + << PAGE_SHIFT; + goto restart; + } + + if (cand >= this_start) + return cand; + } + + return 0; +} +#else /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start, phys_addr_t end, phys_addr_t size, phys_addr_t align, int nid)
@@ -123,6 +172,7 @@ phys_addr_t __init_memblock memblock_find_in_range_node(phys_addr_t start, } return 0; } +#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ /** * memblock_find_in_range - find free area in given range
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1.7.1