Re: [Qemu-devel] [Qemu-block] [PATCH 0/5] blockjobs: Fix transactional race condition

[Kevin Wolf]

Am 28.09.2016 um 14:16 hat Vladimir Sementsov-Ogievskiy geschrieben:
> >I think jobs will need to remain "one coroutine, one job" for now,
> >but there's no reason why drive-backup or blockdev-backup can't
> >just create multiple jobs each if that's what they need to do.
> >(The backup job object could, in theory, just have another job
> >pointer to a helper job if it really became necessary.)

What's the problem with a job spawning additional coroutines internally?
Jobs already do this all the time (AIO requests are just coroutines in
disguise.)

A job is basically just the user interface for managing a background
process, so helper jobs that are managed internally rather than by the
user don't seem to make that much sense.

Kevin