crash when connecting to targets using nr_io_queues < num cpus

[Keith Busch]

On Tue, Sep 13, 2016 at 09:21:36AM -0500, Steve Wise wrote:
> > 
> > >>> I think Ming sent a patch for this some time ago... Not sure what
> > >>> happened with it though...
> > >>
> > >> This?
> > >>
> > >> http://lists.infradead.org/pipermail/linux-nvme/2016-June/004884.html
> > >
> > > This is indeed the same problem.  I don't have the knoggin to propose a fix.
> > > Sagi/Christoph, do you have any ideas on this?  I'm willing to take and idea
> > > forward and test it out of you all have any clever ideas.  We should at
> least
> > > prevent setting nr_io_queues to a value that will crash immediately when
> nvmf is
> > > used...
> > 
> > I think that Ming and Keith had a few suggestions.
> > 
> > ++ Keith.
> >
> 
> Ming has been silent. :(  Keith, any thoughts on this?  

Sorry, I've also been side tracked. :(

Offline, I've been reviewing and testing new mappings from Christoph
and Thomas that should get all the queues assigned. It wasn't developed
specically for this issue, but it should fix this anyway. I think the
new mapping is really close to being ready for public consideration,
but I'll wait for Christoph on that.