mm: Tag VMA with VM_CDM flag explicitly during mbind(MPOL_BIND) and page fault

ascend inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4JMLR


CVE: NA
-------------------

Mark all the applicable VMAs with VM_CDM explicitly during mbind(MPOL_BIND)
call if the user provided nodemask has a CDM node.

Mark the corresponding VMA with VM_CDM flag if the allocated page happens
to be from a CDM node. This can be expensive from performance stand point.
There are multiple checks to avoid an expensive page_to_nid lookup but it
can be optimized further.

Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Lijun Fang <fanglijun3@huawei.com>
Reviewed-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>