From fb06bc8e5f42f38c011de0e59481f464a82380f6 Mon Sep 17 00:00:00 2001 From: Tang Chen Date: Fri, 22 Feb 2013 16:33:42 -0800 Subject: [PATCH] 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 Reviewed-by: Wen Congyang Reviewed-by: Lai Jiangshan Tested-by: Lin Feng Cc: Wu Jianguo Cc: Mel Gorman Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Thomas Gleixner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/memblock.h | 1 + mm/memblock.c | 18 +++++++++++++++++- 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/include/linux/memblock.h b/include/linux/memblock.h index f388203..dfefaf1 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -42,6 +42,7 @@ struct memblock { extern struct memblock memblock; extern int memblock_debug; +extern struct movablemem_map movablemem_map; #define memblock_dbg(fmt, ...) \ if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) 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; } -- 2.7.4