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



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


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