[RFC PATCH 4/4] mm: hwpoison: soft offline supports thp migration

[Zi Yan]

From: Zi Yan <zi....@cs.rutgers.edu>

This patch enables thp migration for soft offline.

Signed-off-by: Zi Yan <zi....@cs.rutgers.edu>
---
 mm/memory-failure.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index c05107548d72..02ae1aff51a4 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1712,25 +1712,6 @@ static int __soft_offline_page(struct page *page, int 
flags, int *split)
 static int soft_offline_in_use_page(struct page *page, int flags, int *split)
 {
        int ret;
-       struct page *hpage = compound_head(page);
-
-       if (!PageHuge(page) && PageTransHuge(hpage)) {
-               lock_page(hpage);
-               if (!PageAnon(hpage) || unlikely(split_huge_page(hpage))) {
-                       unlock_page(hpage);
-                       if (!PageAnon(hpage))
-                               pr_info("soft offline: %#lx: non anonymous 
thp\n", page_to_pfn(page));
-                       else
-                               pr_info("soft offline: %#lx: thp split 
failed\n", page_to_pfn(page));
-                       put_hwpoison_page(hpage);
-                       return -EBUSY;
-               }
-               if (split)
-                       *split = 1;
-               unlock_page(hpage);
-               get_hwpoison_page(page);
-               put_hwpoison_page(hpage);
-       }
 
        if (PageHuge(page))
                ret = soft_offline_huge_page(page, flags);
-- 
2.13.2