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authorXishi Qiu <qiuxishi@huawei.com>2014-09-09 14:50:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-09-10 15:42:12 -0700
commit0a313a998adbae19c1309f80a3ad79107fff7c4e (patch)
treea1b923e94fa485782936bf300464a3feb961f6b9 /mm/nobootmem.c
parent619df5d2870b80696fd32521376560e0a4223e44 (diff)
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mem-hotplug: let memblock skip the hotpluggable memory regions in __next_mem_range()
Let memblock skip the hotpluggable memory regions in __next_mem_range(), it is used to to prevent memblock from allocating hotpluggable memory for the kernel at early time. The code is the same as __next_mem_range_rev(). Clear hotpluggable flag before releasing free pages to the buddy allocator. If we don't clear hotpluggable flag in free_low_memory_core_early(), the memory which marked hotpluggable flag will not free to buddy allocator. Because __next_mem_range() will skip them. free_low_memory_core_early for_each_free_mem_range for_each_mem_range __next_mem_range [akpm@linux-foundation.org: fix warning] Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> Cc: Tejun Heo <tj@kernel.org> Cc: Tang Chen <tangchen@cn.fujitsu.com> Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Wen Congyang <wency@cn.fujitsu.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/nobootmem.c')
-rw-r--r--mm/nobootmem.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 7ed58602e71b..7c7ab32ee503 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -119,6 +119,8 @@ static unsigned long __init free_low_memory_core_early(void)
phys_addr_t start, end;
u64 i;
+ memblock_clear_hotplug(0, -1);
+
for_each_free_mem_range(i, NUMA_NO_NODE, &start, &end, NULL)
count += __free_memory_core(start, end);