diff options
Diffstat (limited to 'tools/testing/radix-tree/test.c')
| -rw-r--r-- | tools/testing/radix-tree/test.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/tools/testing/radix-tree/test.c b/tools/testing/radix-tree/test.c index 88bf57f7175e..e5726e373646 100644 --- a/tools/testing/radix-tree/test.c +++ b/tools/testing/radix-tree/test.c @@ -151,6 +151,40 @@ void item_full_scan(struct radix_tree_root *root, unsigned long start, assert(nfound == 0); } +/* Use the same pattern as tag_pages_for_writeback() in mm/page-writeback.c */ +int tag_tagged_items(struct radix_tree_root *root, pthread_mutex_t *lock, + unsigned long start, unsigned long end, unsigned batch, + unsigned iftag, unsigned thentag) +{ + unsigned long tagged = 0; + struct radix_tree_iter iter; + void **slot; + + if (batch == 0) + batch = 1; + + if (lock) + pthread_mutex_lock(lock); + radix_tree_for_each_tagged(slot, root, &iter, start, iftag) { + if (iter.index > end) + break; + radix_tree_iter_tag_set(root, &iter, thentag); + tagged++; + if ((tagged % batch) != 0) + continue; + slot = radix_tree_iter_resume(slot, &iter); + if (lock) { + pthread_mutex_unlock(lock); + rcu_barrier(); + pthread_mutex_lock(lock); + } + } + if (lock) + pthread_mutex_unlock(lock); + + return tagged; +} + /* Use the same pattern as find_swap_entry() in mm/shmem.c */ unsigned long find_item(struct radix_tree_root *root, void *item) { |