damon_start
int damon_start(struct damon_ctx **ctxs, int nr_ctxs, bool exclusive);
err = damon_start(&ctx, 1, true);
err = damon_start(&ctx, 1, true);
err = damon_start(&damon_stat_context, 1, true);
err = damon_start(&ctx, 1, false);
return damon_start(ctxs, 2, true);
err = damon_start(&ctx, 1, true);
err = damon_start(&ctx, 1, true);