Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / mm / huge_memory.c

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index e62ddb8f24b6ef9287956bbebb4a2d0d12afddce..113e35c4750209b7cf6f61f54a041f37219ebc4d 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -650,10 +650,10 @@ static inline gfp_t alloc_hugepage_gfpmask(int defrag)
 
 static inline struct page *alloc_hugepage_vma(int defrag,
                                              struct vm_area_struct *vma,
-                                             unsigned long haddr)
+                                             unsigned long haddr, int nd)
 {
        return alloc_pages_vma(alloc_hugepage_gfpmask(defrag),
-                              HPAGE_PMD_ORDER, vma, haddr);
+                              HPAGE_PMD_ORDER, vma, haddr, nd);
 }
 
 #ifndef CONFIG_NUMA
@@ -678,7 +678,7 @@ int do_huge_pmd_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
                if (unlikely(khugepaged_enter(vma)))
                        return VM_FAULT_OOM;
                page = alloc_hugepage_vma(transparent_hugepage_defrag(vma),
-                                         vma, haddr);
+                                         vma, haddr, numa_node_id());
                if (unlikely(!page))
                        goto out;
                if (unlikely(mem_cgroup_newpage_charge(page, mm, GFP_KERNEL))) {
@@ -799,8 +799,8 @@ static int do_huge_pmd_wp_page_fallback(struct mm_struct *mm,
        }
 
        for (i = 0; i < HPAGE_PMD_NR; i++) {
-               pages[i] = alloc_page_vma(GFP_HIGHUSER_MOVABLE,
-                                         vma, address);
+               pages[i] = alloc_page_vma_node(GFP_HIGHUSER_MOVABLE,
+                                              vma, address, page_to_nid(page));
                if (unlikely(!pages[i] ||
                             mem_cgroup_newpage_charge(pages[i], mm,
                                                       GFP_KERNEL))) {
@@ -902,7 +902,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
        if (transparent_hugepage_enabled(vma) &&
            !transparent_hugepage_debug_cow())
                new_page = alloc_hugepage_vma(transparent_hugepage_defrag(vma),
-                                             vma, haddr);
+                                             vma, haddr, numa_node_id());
        else
                new_page = NULL;
 
@@ -1745,7 +1745,8 @@ static void __collapse_huge_page_copy(pte_t *pte, struct page *page,
 static void collapse_huge_page(struct mm_struct *mm,
                               unsigned long address,
                               struct page **hpage,
-                              struct vm_area_struct *vma)
+                              struct vm_area_struct *vma,
+                              int node)
 {
        pgd_t *pgd;
        pud_t *pud;
@@ -1761,6 +1762,10 @@ static void collapse_huge_page(struct mm_struct *mm,
 #ifndef CONFIG_NUMA
        VM_BUG_ON(!*hpage);
        new_page = *hpage;
+       if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) {
+               up_read(&mm->mmap_sem);
+               return;
+       }
 #else
        VM_BUG_ON(*hpage);
        /*
@@ -1773,18 +1778,19 @@ static void collapse_huge_page(struct mm_struct *mm,
         * mmap_sem in read mode is good idea also to allow greater
         * scalability.
         */
-       new_page = alloc_hugepage_vma(khugepaged_defrag(), vma, address);
+       new_page = alloc_hugepage_vma(khugepaged_defrag(), vma, address,
+                                     node);
        if (unlikely(!new_page)) {
                up_read(&mm->mmap_sem);
                *hpage = ERR_PTR(-ENOMEM);
                return;
        }
-#endif
        if (unlikely(mem_cgroup_newpage_charge(new_page, mm, GFP_KERNEL))) {
                up_read(&mm->mmap_sem);
                put_page(new_page);
                return;
        }
+#endif
 
        /* after allocating the hugepage upgrade to mmap_sem write mode */
        up_read(&mm->mmap_sem);
@@ -1811,6 +1817,8 @@ static void collapse_huge_page(struct mm_struct *mm,
        /* VM_PFNMAP vmas may have vm_ops null but vm_file set */
        if (!vma->anon_vma || vma->vm_ops || vma->vm_file)
                goto out;
+       if (is_vma_temporary_stack(vma))
+               goto out;
        VM_BUG_ON(is_linear_pfn_mapping(vma) || is_pfn_mapping(vma));
 
        pgd = pgd_offset(mm, address);
@@ -1917,6 +1925,7 @@ static int khugepaged_scan_pmd(struct mm_struct *mm,
        struct page *page;
        unsigned long _address;
        spinlock_t *ptl;
+       int node = -1;
 
        VM_BUG_ON(address & ~HPAGE_PMD_MASK);
 
@@ -1947,6 +1956,13 @@ static int khugepaged_scan_pmd(struct mm_struct *mm,
                page = vm_normal_page(vma, _address, pteval);
                if (unlikely(!page))
                        goto out_unmap;
+               /*
+                * Chose the node of the first page. This could
+                * be more sophisticated and look at more pages,
+                * but isn't for now.
+                */
+               if (node == -1)
+                       node = page_to_nid(page);
                VM_BUG_ON(PageCompound(page));
                if (!PageLRU(page) || PageLocked(page) || !PageAnon(page))
                        goto out_unmap;
@@ -1963,7 +1979,7 @@ out_unmap:
        pte_unmap_unlock(pte, ptl);
        if (ret)
                /* collapse_huge_page will return with the mmap_sem released */
-               collapse_huge_page(mm, address, hpage, vma);
+               collapse_huge_page(mm, address, hpage, vma, node);
 out:
        return ret;
 }
@@ -2032,32 +2048,27 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages,
                if ((!(vma->vm_flags & VM_HUGEPAGE) &&
                     !khugepaged_always()) ||
                    (vma->vm_flags & VM_NOHUGEPAGE)) {
+               skip:
                        progress++;
                        continue;
                }
-
                /* VM_PFNMAP vmas may have vm_ops null but vm_file set */
-               if (!vma->anon_vma || vma->vm_ops || vma->vm_file) {
-                       khugepaged_scan.address = vma->vm_end;
-                       progress++;
-                       continue;
-               }
+               if (!vma->anon_vma || vma->vm_ops || vma->vm_file)
+                       goto skip;
+               if (is_vma_temporary_stack(vma))
+                       goto skip;
+
                VM_BUG_ON(is_linear_pfn_mapping(vma) || is_pfn_mapping(vma));
 
                hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK;
                hend = vma->vm_end & HPAGE_PMD_MASK;
-               if (hstart >= hend) {
-                       progress++;
-                       continue;
-               }
+               if (hstart >= hend)
+                       goto skip;
+               if (khugepaged_scan.address > hend)
+                       goto skip;
                if (khugepaged_scan.address < hstart)
                        khugepaged_scan.address = hstart;
-               if (khugepaged_scan.address > hend) {
-                       khugepaged_scan.address = hend + HPAGE_PMD_SIZE;
-                       progress++;
-                       continue;
-               }
-               BUG_ON(khugepaged_scan.address & ~HPAGE_PMD_MASK);
+               VM_BUG_ON(khugepaged_scan.address & ~HPAGE_PMD_MASK);
 
                while (khugepaged_scan.address < hend) {
                        int ret;
@@ -2086,7 +2097,7 @@ breakouterloop:
 breakouterloop_mmap_sem:
 
        spin_lock(&khugepaged_mm_lock);
-       BUG_ON(khugepaged_scan.mm_slot != mm_slot);
+       VM_BUG_ON(khugepaged_scan.mm_slot != mm_slot);
        /*
         * Release the current mm_slot if this mm is about to die, or
         * if we scanned all vmas of this mm.
@@ -2241,9 +2252,9 @@ static int khugepaged(void *none)
 
        for (;;) {
                mutex_unlock(&khugepaged_mutex);
-               BUG_ON(khugepaged_thread != current);
+               VM_BUG_ON(khugepaged_thread != current);
                khugepaged_loop();
-               BUG_ON(khugepaged_thread != current);
+               VM_BUG_ON(khugepaged_thread != current);
 
                mutex_lock(&khugepaged_mutex);
                if (!khugepaged_enabled())