On Tue, May 18, 2021 at 12:07:51PM +0200, Emanuele Giuseppe Esposito wrote:
>      } else {
>          /*
>           * We enable copy-range, but keep small copy_size, until first
>           * successful copy_range (look at block_copy_do_copy).
>           */

Is this comment still correct? It appears that this branch of the if
statement does not always enable copy-range (the !use_copy_range case).

> -        s->use_copy_range = use_copy_range;
> -        s->copy_size = MAX(s->cluster_size, BLOCK_COPY_MAX_BUFFER);
> +        s->method = use_copy_range ? COPY_RANGE_SMALL : COPY_READ_WRITE;