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>

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index f388203db7e85b421bfb58d3963f2edbc315c70c..dfefaf111c0ed4e08fecddd71c1f02bfd69d03cc 100644 (file)
--- 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 b8d9147e5c084de3264fc49ea93c95e22eddf49d..c83ff97f57f415c0f3eca4ee67d552ed410bd9e9 100644 (file)
--- 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;
 }