[libvirt-users] Calling 'virsh' from within a hook script - avoid deadlock?

[Michal Privoznik]

On 06.11.2013 16:17, Michal Privoznik wrote:
> On 06.11.2013 11:23, TSADOK, Shlomi (Shlomi) wrote:
>> [...]
> 
> http://libvirt.org/hooks.html#recursive
> 
> Do not do this.
> 
> Michal
> 

Maybe I should explain a bit why this is not supported. It's true that
libvirt is multithreaded. However, not in terms of multiple write/modify
accesses to a single domain. That is, when a domain is being started up
it is a modify access. Meanwhile, at some point during the transaction
the startup hook script is called. If the script decides to start
another modify transaction an deadlock occurs.

Michal