Re: [RFC PATCH 4/8] blockjob: implement .change_aio_ctx in child_job

[Hanna Reitz <hreitz@redhat.com>]

On 12.07.22 23:19, Emanuele Giuseppe Esposito wrote:
> child_job_change_aio_ctx() is very similar to
> child_job_can_set_aio_ctx(), but it implements a new transaction
> so that if all check pass, the new transaction's .commit()
> will take care of changin the BlockJob AioContext.
> child_job_set_aio_ctx_commit() is similar to child_job_set_aio_ctx(),
> but it doesn't need to invoke the recursion, as this is already
> taken care by child_job_change_aio_ctx().
>
> Note: bdrv_child_try_change_aio_context() is not called by
> anyone at this point.
>
> Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
> ---
>   blockjob.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 45 insertions(+)

Looks good, disregarding the fact that I’d like it very much if we could 
find some other primitive than tran_add_trail() to get these handlers to 
run on a drained graph.

But that’s taste (and something to talk about in patch 3), so I’ll just 
give a

Reviewed-by: Hanna Reitz <hreitz@redhat.com>