[PATCH v1 08/12] mm: hwpoison: soft offline supports thp migration
From: <hidden>
Date: 2016-09-26 15:26:01
Also in:
lkml
Subsystem:
hwpoison memory failure handling, memory management, the rest · Maintainers:
Miaohe Lin, Andrew Morton, Linus Torvalds
From: Naoya Horiguchi <redacted> This patch enables thp migration for soft offline. Signed-off-by: Naoya Horiguchi <redacted> --- mm/memory-failure.c | 31 ++++++++++++------------------- 1 file changed, 12 insertions(+), 19 deletions(-)
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index e105f91..36eb064 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c@@ -1494,7 +1494,17 @@ static struct page *new_page(struct page *p, unsigned long private, int **x) if (PageHuge(p)) return alloc_huge_page_node(page_hstate(compound_head(p)), nid); - else + else if (thp_migration_supported() && PageTransHuge(p)) { + struct page *thp; + + thp = alloc_pages_node(nid, + (GFP_TRANSHUGE | __GFP_THISNODE) & ~__GFP_RECLAIM, + HPAGE_PMD_ORDER); + if (!thp) + return NULL; + prep_transhuge_page(thp); + return thp; + } else return __alloc_pages_node(nid, GFP_HIGHUSER_MOVABLE, 0); }
@@ -1697,28 +1707,11 @@ static int __soft_offline_page(struct page *page, int flags) static int soft_offline_in_use_page(struct page *page, int flags) { 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; - } - unlock_page(hpage); - get_hwpoison_page(page); - put_hwpoison_page(hpage); - } if (PageHuge(page)) ret = soft_offline_huge_page(page, flags); else - ret = __soft_offline_page(page, flags); + ret = __soft_offline_page(compound_head(page), flags); return ret; }
--
2.9.3
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