ascend inclusion
category: feature
Bugzilla: N/A
CVE: N/A

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When the driver gets huge pages by alloc_huge_page_node, it attempts
to apply for migrate hugepages after the reserved memory hugepages
are used up. We expect that the migrated hugepages that are applied
for can be charged in memcg to limit the memory usage.

__GFP_ACOUNT flag is added to gfp mask before we allocate migrage
hugepages. Then, if memcg is set by memalloc_use_memcg(), the
allocated migrate hugepages will be charged to this memcg.
Signed-off-by: NZhou Guanghui <zhouguanghui1@huawei.com>
Reviewed-by: NDing Tianhong <dingtianhong@huawei.com>
Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>