mm: hwpoison: enable memory error handling on 1GB hugepage optionaly

hulk inclusion
category: feature
bugzilla: 186704, https://gitee.com/openeuler/kernel/issues/I58V3W


CVE: NA

--------------------------------

The memory error handling on 1GB hugepage is disabled by commit 31286a84
because it may lead to a kernel panic.

However, the commit will result a more troublesome downstream problem. So we
have to revert it in some situation. At the same time, we backport commit
15494520 which resolve the kernel panic described in commit 31286a84.

We add a new cmdline named 'hugetlb_hwpoison_full' to enable memory error
handling on 1GB hugepage. By default, the memory error handling on 1GB hugepage
is disabled.

Note that the kernel panic may not have been completely resolved!

Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>