execve: make responsive to SIGKILL with large arguments

[pandora-kernel.git] / fs / fs-writeback.c

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 8a5807d..81e086d 100644 (file)
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -68,7 +68,7 @@ int nr_pdflush_threads;
  */
 int writeback_in_progress(struct backing_dev_info *bdi)
 {
-       return !list_empty(&bdi->work_list);
+       return test_bit(BDI_writeback_running, &bdi->state);
 }
 
 static void bdi_queue_work(struct backing_dev_info *bdi,
@@ -740,6 +740,7 @@ long wb_do_writeback(struct bdi_writeback *wb, int force_wait)
        struct wb_writeback_work *work;
        long wrote = 0;
 
+       set_bit(BDI_writeback_running, &wb->bdi->state);
        while ((work = get_next_work_item(bdi)) != NULL) {
                /*
                 * Override sync mode, in case we must wait for completion
@@ -766,6 +767,7 @@ long wb_do_writeback(struct bdi_writeback *wb, int force_wait)
         * Check for periodic writeback, kupdated() style
         */
        wrote += wb_check_old_data_flush(wb);
+       clear_bit(BDI_writeback_running, &wb->bdi->state);
 
        return wrote;
 }
@@ -806,7 +808,7 @@ int bdi_writeback_thread(void *data)
                        wb->last_active = jiffies;
 
                set_current_state(TASK_INTERRUPTIBLE);
-               if (!list_empty(&bdi->work_list)) {
+               if (!list_empty(&bdi->work_list) || kthread_should_stop()) {
                        __set_current_state(TASK_RUNNING);
                        continue;
                }