Merge branch 'linus' into tracing/urgent

6 files changed, 17 insertions, 51 deletions

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index d143ab6..6058b53 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1796,6 +1796,7 @@ void unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
 static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
 				struct page *page, unsigned long address)
 {
+	struct hstate *h = hstate_vma(vma);
 	struct vm_area_struct *iter_vma;
 	struct address_space *mapping;
 	struct prio_tree_iter iter;
@@ -1805,7 +1806,7 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
 	 * vm_pgoff is in PAGE_SIZE units, hence the different calculation
 	 * from page cache lookup which is in HPAGE_SIZE units.
 	 */
-	address = address & huge_page_mask(hstate_vma(vma));
+	address = address & huge_page_mask(h);
 	pgoff = ((address - vma->vm_start) >> PAGE_SHIFT)
 		+ (vma->vm_pgoff >> PAGE_SHIFT);
 	mapping = (struct address_space *)page_private(page);
@@ -1824,7 +1825,7 @@ static int unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
 		 */
 		if (!is_vma_resv_set(iter_vma, HPAGE_RESV_OWNER))
 			unmap_hugepage_range(iter_vma,
-				address, address + HPAGE_SIZE,
+				address, address + huge_page_size(h),
 				page);
 	}
 
diff --git a/mm/mlock.c b/mm/mlock.c
index 008ea70..1ada366 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -66,14 +66,10 @@ void __clear_page_mlock(struct page *page)
 		putback_lru_page(page);
 	} else {
 		/*
-		 * Page not on the LRU yet.  Flush all pagevecs and retry.
+		 * We lost the race. the page already moved to evictable list.
 		 */
-		lru_add_drain_all();
-		if (!isolate_lru_page(page))
-			putback_lru_page(page);
-		else if (PageUnevictable(page))
+		if (PageUnevictable(page))
 			count_vm_event(UNEVICTABLE_PGSTRANDED);
-
 	}
 }
 
@@ -166,7 +162,7 @@ static long __mlock_vma_pages_range(struct vm_area_struct *vma,
 	unsigned long addr = start;
 	struct page *pages[16]; /* 16 gives a reasonable batch */
 	int nr_pages = (end - start) / PAGE_SIZE;
-	int ret;
+	int ret = 0;
 	int gup_flags = 0;
 
 	VM_BUG_ON(start & ~PAGE_MASK);
@@ -187,8 +183,6 @@ static long __mlock_vma_pages_range(struct vm_area_struct *vma,
 	if (vma->vm_flags & VM_WRITE)
 		gup_flags |= GUP_FLAGS_WRITE;
 
-	lru_add_drain_all();	/* push cached pages to LRU */
-
 	while (nr_pages > 0) {
 		int i;
 
@@ -251,8 +245,6 @@ static long __mlock_vma_pages_range(struct vm_area_struct *vma,
 		ret = 0;
 	}
 
-	lru_add_drain_all();	/* to update stats */
-
 	return ret;	/* count entire vma as locked_vm */
 }
 
@@ -546,6 +538,8 @@ asmlinkage long sys_mlock(unsigned long start, size_t len)
 	if (!can_do_mlock())
 		return -EPERM;
 
+	lru_add_drain_all();	/* flush pagevec */
+
 	down_write(&current->mm->mmap_sem);
 	len = PAGE_ALIGN(len + (start & ~PAGE_MASK));
 	start &= PAGE_MASK;
@@ -612,6 +606,8 @@ asmlinkage long sys_mlockall(int flags)
 	if (!can_do_mlock())
 		goto out;
 
+	lru_add_drain_all();	/* flush pagevec */
+
 	down_write(&current->mm->mmap_sem);
 
 	lock_limit = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur;
diff --git a/mm/mmap.c b/mm/mmap.c
index de14ac2..d4855a6 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1704,7 +1704,7 @@ find_extend_vma(struct mm_struct *mm, unsigned long addr)
 	vma = find_vma_prev(mm, addr, &prev);
 	if (vma && (vma->vm_start <= addr))
 		return vma;
-	if (expand_stack(prev, addr))
+	if (!prev || expand_stack(prev, addr))
 		return NULL;
 	if (prev->vm_flags & VM_LOCKED) {
 		if (mlock_vma_pages_range(prev, addr, prev->vm_end) < 0)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 54069e6..d8ac014 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1561,6 +1561,10 @@ nofail_alloc:
 
 	/* We now go into synchronous reclaim */
 	cpuset_memory_pressure_bump();
+	/*
+	 * The task's cpuset might have expanded its set of allowable nodes
+	 */
+	cpuset_update_task_memory_state();
 	p->flags |= PF_MEMALLOC;
 	reclaim_state.reclaimed_slab = 0;
 	p->reclaim_state = &reclaim_state;
diff --git a/mm/page_cgroup.c b/mm/page_cgroup.c
index f59d797..1223d92 100644
--- a/mm/page_cgroup.c
+++ b/mm/page_cgroup.c
@@ -165,7 +165,7 @@ int online_page_cgroup(unsigned long start_pfn,
 	unsigned long start, end, pfn;
 	int fail = 0;
 
-	start = start_pfn & (PAGES_PER_SECTION - 1);
+	start = start_pfn & ~(PAGES_PER_SECTION - 1);
 	end = ALIGN(start_pfn + nr_pages, PAGES_PER_SECTION);
 
 	for (pfn = start; !fail && pfn < end; pfn += PAGES_PER_SECTION) {
@@ -188,7 +188,7 @@ int offline_page_cgroup(unsigned long start_pfn,
 {
 	unsigned long start, end, pfn;
 
-	start = start_pfn & (PAGES_PER_SECTION - 1);
+	start = start_pfn & ~(PAGES_PER_SECTION - 1);
 	end = ALIGN(start_pfn + nr_pages, PAGES_PER_SECTION);
 
 	for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 3b58602..c141b3e 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2368,39 +2368,6 @@ int page_evictable(struct page *page, struct vm_area_struct *vma)
 	return 1;
 }
 
-static void show_page_path(struct page *page)
-{
-	char buf[256];
-	if (page_is_file_cache(page)) {
-		struct address_space *mapping = page->mapping;
-		struct dentry *dentry;
-		pgoff_t pgoff = page->index << (PAGE_CACHE_SHIFT - PAGE_SHIFT);
-
-		spin_lock(&mapping->i_mmap_lock);
-		dentry = d_find_alias(mapping->host);
-		printk(KERN_INFO "rescued: %s %lu\n",
-		       dentry_path(dentry, buf, 256), pgoff);
-		spin_unlock(&mapping->i_mmap_lock);
-	} else {
-#if defined(CONFIG_MM_OWNER) && defined(CONFIG_MMU)
-		struct anon_vma *anon_vma;
-		struct vm_area_struct *vma;
-
-		anon_vma = page_lock_anon_vma(page);
-		if (!anon_vma)
-			return;
-
-		list_for_each_entry(vma, &anon_vma->head, anon_vma_node) {
-			printk(KERN_INFO "rescued: anon %s\n",
-			       vma->vm_mm->owner->comm);
-			break;
-		}
-		page_unlock_anon_vma(anon_vma);
-#endif
-	}
-}
-
-
 /**
  * check_move_unevictable_page - check page for evictability and move to appropriate zone lru list
  * @page: page to check evictability and move to appropriate lru list
@@ -2421,8 +2388,6 @@ retry:
 	if (page_evictable(page, NULL)) {
 		enum lru_list l = LRU_INACTIVE_ANON + page_is_file_cache(page);
 
-		show_page_path(page);
-
 		__dec_zone_state(zone, NR_UNEVICTABLE);
 		list_move(&page->lru, &zone->lru[l].list);
 		__inc_zone_state(zone, NR_INACTIVE_ANON + l);