static DEFINE_SPINLOCK(free_vmap_area_lock);
/* Export for kexec only */
LIST_HEAD(vmap_area_list);
-static LLIST_HEAD(vmap_purge_list);
static struct rb_root vmap_area_root = RB_ROOT;
static bool vmap_initialized __read_mostly;
+static struct rb_root purge_vmap_area_root = RB_ROOT;
+static LIST_HEAD(purge_vmap_area_list);
+static DEFINE_SPINLOCK(purge_vmap_area_lock);
+
/*
* This kmem_cache is used for vmap_area objects. Instead of
* allocating from slab we reuse an object from this cache to
if (!merged)
link_va(va, root, parent, link, head);
- /*
- * Last step is to check and update the tree.
- */
- augment_tree_propagate_from(va);
+ return va;
+}
+
+static __always_inline struct vmap_area *
+merge_or_add_vmap_area_augment(struct vmap_area *va,
+ struct rb_root *root, struct list_head *head)
+{
+ va = merge_or_add_vmap_area(va, root, head);
+ if (va)
+ augment_tree_propagate_from(va);
+
return va;
}
* Insert/Merge it back to the free tree/list.
*/
spin_lock(&free_vmap_area_lock);
- merge_or_add_vmap_area(va, &free_vmap_area_root, &free_vmap_area_list);
+ merge_or_add_vmap_area_augment(va, &free_vmap_area_root, &free_vmap_area_list);
spin_unlock(&free_vmap_area_lock);
}
static bool __purge_vmap_area_lazy(unsigned long start, unsigned long end)
{
unsigned long resched_threshold;
- struct llist_node *valist;
- struct vmap_area *va;
- struct vmap_area *n_va;
+ struct list_head local_pure_list;
+ struct vmap_area *va, *n_va;
lockdep_assert_held(&vmap_purge_lock);
- valist = llist_del_all(&vmap_purge_list);
- if (unlikely(valist == NULL))
+ spin_lock(&purge_vmap_area_lock);
+ purge_vmap_area_root = RB_ROOT;
+ list_replace_init(&purge_vmap_area_list, &local_pure_list);
+ spin_unlock(&purge_vmap_area_lock);
+
+ if (unlikely(list_empty(&local_pure_list)))
return false;
- /*
- * TODO: to calculate a flush range without looping.
- * The list can be up to lazy_max_pages() elements.
- */
- llist_for_each_entry(va, valist, purge_list) {
- if (va->va_start < start)
- start = va->va_start;
- if (va->va_end > end)
- end = va->va_end;
- }
+ start = min(start,
+ list_first_entry(&local_pure_list,
+ struct vmap_area, list)->va_start);
+
+ end = max(end,
+ list_last_entry(&local_pure_list,
+ struct vmap_area, list)->va_end);
flush_tlb_kernel_range(start, end);
resched_threshold = lazy_max_pages() << 1;
spin_lock(&free_vmap_area_lock);
- llist_for_each_entry_safe(va, n_va, valist, purge_list) {
+ list_for_each_entry_safe(va, n_va, &local_pure_list, list) {
unsigned long nr = (va->va_end - va->va_start) >> PAGE_SHIFT;
unsigned long orig_start = va->va_start;
unsigned long orig_end = va->va_end;
* detached and there is no need to "unlink" it from
* anything.
*/
- va = merge_or_add_vmap_area(va, &free_vmap_area_root,
- &free_vmap_area_list);
+ va = merge_or_add_vmap_area_augment(va, &free_vmap_area_root,
+ &free_vmap_area_list);
if (!va)
continue;
nr_lazy = atomic_long_add_return((va->va_end - va->va_start) >>
PAGE_SHIFT, &vmap_lazy_nr);
- /* After this point, we may free va at any time */
- llist_add(&va->purge_list, &vmap_purge_list);
+ /*
+ * Merge or place it to the purge tree/list.
+ */
+ spin_lock(&purge_vmap_area_lock);
+ merge_or_add_vmap_area(va,
+ &purge_vmap_area_root, &purge_vmap_area_list);
+ spin_unlock(&purge_vmap_area_lock);
+ /* After this point, we may free va at any time */
if (unlikely(nr_lazy > lazy_max_pages()))
try_purge_vmap_area_lazy();
}
debug_check_no_locks_freed(area->addr, get_vm_area_size(area));
debug_check_no_obj_freed(area->addr, get_vm_area_size(area));
- kasan_poison_vmalloc(area->addr, area->size);
+ kasan_poison_vmalloc(area->addr, get_vm_area_size(area));
vm_remove_mappings(area, deallocate_pages);
}
kfree(area);
- return;
}
static inline void __vfree_deferred(const void *addr)
{
const gfp_t nested_gfp = (gfp_mask & GFP_RECLAIM_MASK) | __GFP_ZERO;
unsigned int nr_pages = get_vm_area_size(area) >> PAGE_SHIFT;
- unsigned int array_size = nr_pages * sizeof(struct page *), i;
+ unsigned long array_size;
+ unsigned int i;
struct page **pages;
+ array_size = (unsigned long)nr_pages * sizeof(struct page *);
gfp_mask |= __GFP_NOWARN;
if (!(gfp_mask & (GFP_DMA | GFP_DMA32)))
gfp_mask |= __GFP_HIGHMEM;
}
if (!pages) {
- remove_vm_area(area->addr);
- kfree(area);
+ free_vm_area(area);
return NULL;
}
* @va:
* in - the VA we start the search(reverse order);
* out - the VA with the highest aligned end address.
+ * @align: alignment for required highest address
*
* Returns: determined end address within vmap_area
*/
while (area--) {
orig_start = vas[area]->va_start;
orig_end = vas[area]->va_end;
- va = merge_or_add_vmap_area(vas[area], &free_vmap_area_root,
- &free_vmap_area_list);
+ va = merge_or_add_vmap_area_augment(vas[area], &free_vmap_area_root,
+ &free_vmap_area_list);
if (va)
kasan_release_vmalloc(orig_start, orig_end,
va->va_start, va->va_end);
for (area = 0; area < nr_vms; area++) {
orig_start = vas[area]->va_start;
orig_end = vas[area]->va_end;
- va = merge_or_add_vmap_area(vas[area], &free_vmap_area_root,
- &free_vmap_area_list);
+ va = merge_or_add_vmap_area_augment(vas[area], &free_vmap_area_root,
+ &free_vmap_area_list);
if (va)
kasan_release_vmalloc(orig_start, orig_end,
va->va_start, va->va_end);
}
static void s_stop(struct seq_file *m, void *p)
- __releases(&vmap_purge_lock)
__releases(&vmap_area_lock)
+ __releases(&vmap_purge_lock)
{
- mutex_unlock(&vmap_purge_lock);
spin_unlock(&vmap_area_lock);
+ mutex_unlock(&vmap_purge_lock);
}
static void show_numa_info(struct seq_file *m, struct vm_struct *v)
static void show_purge_info(struct seq_file *m)
{
- struct llist_node *head;
struct vmap_area *va;
- head = READ_ONCE(vmap_purge_list.first);
- if (head == NULL)
- return;
-
- llist_for_each_entry(va, head, purge_list) {
+ spin_lock(&purge_vmap_area_lock);
+ list_for_each_entry(va, &purge_vmap_area_list, list) {
seq_printf(m, "0x%pK-0x%pK %7ld unpurged vm_area\n",
(void *)va->va_start, (void *)va->va_end,
va->va_end - va->va_start);
}
+ spin_unlock(&purge_vmap_area_lock);
}
static int s_show(struct seq_file *m, void *p)
seq_putc(m, '\n');
/*
- * As a final step, dump "unpurged" areas. Note,
- * that entire "/proc/vmallocinfo" output will not
- * be address sorted, because the purge list is not
- * sorted.
+ * As a final step, dump "unpurged" areas.
*/
if (list_is_last(&va->list, &vmap_area_list))
show_purge_info(m);
projects / linux-2.6-microblaze.git / blobdiff