On 30.07.19 16:18, Vladimir Sementsov-Ogievskiy wrote:
> Similarly to previous commit, prepare for parallelizing write-loop
> iterations.
> 
> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> ---
>  block/qcow2.c | 150 +++++++++++++++++++++++++++++---------------------
>  1 file changed, 88 insertions(+), 62 deletions(-)
> 
> diff --git a/block/qcow2.c b/block/qcow2.c
> index 7fa71968b2..37766b8b7c 100644
> --- a/block/qcow2.c
> +++ b/block/qcow2.c

[...]

> + * l2meta  - if not NULL, qcow2_co_do_pwritev() will consume it. Caller must not
> + *           use it somehow after qcow2_co_pwritev_task() call

[...]

> +        l2meta = NULL; /* l2meta is consumed by qcow2_co_do_pwritev() */

By the way, qcow2_co_do_pwritev() does not exist. :-)

Max