[libvirt] [PATCHV2] qemu: Add support for changing timeout value to open unix monitor socket

[Martin Kletzander]

On Tue, Jan 07, 2014 at 10:39:26AM +0000, Richard W.M. Jones wrote:
> On Tue, Jan 07, 2014 at 11:37:11AM +0100, Martin Kletzander wrote:
> > On Tue, Jan 07, 2014 at 10:28:41AM +0000, Richard W.M. Jones wrote:
> > > On Thu, Jan 02, 2014 at 06:29:35PM +0200, Pavel Fux wrote:
> > > > Adding an option to change monitor socket opening timeout
> > > > the current default is 3 seconds and in some cases it's not enough
> > > 
> > > This should change the *default* to something way bigger than 3
> > > seconds, since lots of people are hitting this.  Just look at the
> > > dozen Ubuntu forum posts and many other bug reports:
> > > 
> > > https://www.google.co.uk/search?q="monitor+socket+did+not+show+up"
> > > 
> > > Sure it can be configurable if you want, but I don't want to have to
> > > tell each and every libguestfs user that they should change this to
> > > something sensible.  Make the default something much larger.
> > > 
> > 
> > I agree with you here, we could change it to at least 5 seconds *and*
> > make it configurable.  I'll propose the change of the default in
> > separate patch and try reviewing this ASAP.
> 
> Is there a reason not to make it 30 seconds?
> 
> The only downside I can see is that if qemu is really hanging/broken
> users will have to wait 30 seconds to see that it is hanging, versus
> waiting 3 or 5 seconds.  I can't see that is much of a drawback.
> 

No, that's the only one.  Unfortunately many users can get nervy when
they have to wait more than necessary amount of time to see that
something is not working.

Let's see if someone else has an opinion, otherwise I'll try to talk
to others and propose a reasonable value with some explanations of the
decision.

Martin
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