mem-hotplug: let memblock skip the hotpluggable memory regions in __next_mem_range()
authorXishi Qiu <qiuxishi@huawei.com>
Tue, 9 Sep 2014 21:50:46 +0000 (14:50 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 10 Sep 2014 22:42:12 +0000 (15:42 -0700)
commit0a313a998adbae19c1309f80a3ad79107fff7c4e
treea1b923e94fa485782936bf300464a3feb961f6b9
parent619df5d2870b80696fd32521376560e0a4223e44
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>
mm/memblock.c
mm/nobootmem.c