hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4SK3S
CVE: NA

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Hugepaged collapse pages into huge page will use the same memory region.
When hugepaged collapse pages into huge page, hugepaged will check if
there is any reliable pages in the area to be collapsed. If this area
contains any reliable pages, hugepaged will alloc memory from mirrored
region. Otherwise it will alloc momory from non-mirrored region.
Signed-off-by: NMa Wupeng <mawupeng1@huawei.com>
Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com>