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-rw-r--r--mm/memory-failure.c2
-rw-r--r--mm/rmap.c1
-rw-r--r--mm/swap_state.c6
-rw-r--r--mm/swapfile.c2
4 files changed, 11 insertions, 0 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 2323a8039a9..6a283cc9317 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -386,6 +386,8 @@ static void collect_procs_anon(struct page *page, struct list_head *to_kill,
struct task_struct *tsk;
struct anon_vma *av;
+ if (unlikely(split_huge_page(page)))
+ return;
read_lock(&tasklist_lock);
av = page_lock_anon_vma(page);
if (av == NULL) /* Not actually mapped anymore */
diff --git a/mm/rmap.c b/mm/rmap.c
index c95d2ba27a0..a3197a8a295 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1400,6 +1400,7 @@ int try_to_unmap(struct page *page, enum ttu_flags flags)
int ret;
BUG_ON(!PageLocked(page));
+ BUG_ON(PageTransHuge(page));
if (unlikely(PageKsm(page)))
ret = try_to_unmap_ksm(page, flags);
diff --git a/mm/swap_state.c b/mm/swap_state.c
index e10f5833167..5c8cfabbc9b 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -157,6 +157,12 @@ int add_to_swap(struct page *page)
if (!entry.val)
return 0;
+ if (unlikely(PageTransHuge(page)))
+ if (unlikely(split_huge_page(page))) {
+ swapcache_free(entry, NULL);
+ return 0;
+ }
+
/*
* Radix-tree node allocations from PF_MEMALLOC contexts could
* completely exhaust the page allocator. __GFP_NOMEMALLOC
diff --git a/mm/swapfile.c b/mm/swapfile.c
index b6adcfbf6f4..07a458d72fa 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -964,6 +964,8 @@ static inline int unuse_pmd_range(struct vm_area_struct *vma, pud_t *pud,
pmd = pmd_offset(pud, addr);
do {
next = pmd_addr_end(addr, end);
+ if (unlikely(pmd_trans_huge(*pmd)))
+ continue;
if (pmd_none_or_clear_bad(pmd))
continue;
ret = unuse_pte_range(vma, pmd, addr, next, entry, page);