Re: [Qemu-devel] [PATCH v2 21/21] qcow2: Gather clusters in a looping loop

[Stefan Hajnoczi]

On Tue, Mar 26, 2013 at 05:50:13PM +0100, Kevin Wolf wrote:
> @@ -793,6 +793,13 @@ static int handle_dependencies(BlockDriverState *bs, 
> uint64_t guest_offset,
>                  bytes = 0;
>              }
>  
> +            /* Stop if already an l2meta exists. We would have to consider
> +             * locks held by it (l2_writeback_lock) and set m->next etc. */

l2_writeback_lock does not exist (yet).

> +            if (bytes == 0 && *m) {
> +                *cur_bytes = 0;
> +                return 0;
> +            }