[libvirt] Re: [Qemu-devel] [PATCH 1/6] Allow multiple monitor devices (v2)

[Anthony Liguori]

Avi Kivity wrote:
> I'm sorry, I don't see why.  It's just like a shell session.
>
> Compare with:
>
> Monitor 1:
> (qemu) notify enospace on
> (qemu) notify vnc-connect on
> (qemu) notify migration-completion on
> (qemu) migrate -d ...
> (qemu) migrate_cancel
> (qemu) migrate -d ...
>
>
> Monitor 2:
> (qemu) wait
> vnc connection ...
> (qemu) wait
> enospc on ide0-0
> (qemu) wait
> migration cancelled
> (qemu) wait
> notification: migration completed
>
> There is no way to tell by looking what has happened (well, in this 
> case you can, but in the general case you cannot).  You have to look 
> at two separate interactive sessions (ctrl-alt-2 ctrl-alt-3 
> ctrl-alt-3).  You have to keep reissuing the wait command.  Oh, and 
> it's racy, so if you're interested in what really happens you have to 
> issue info commands on session 1.

How is it less racy?

-- 
Regards,

Anthony Liguori