>>> On 15.09.15 at 15:42, <konrad.w...@oracle.com> wrote: > We are running into issues where our guests immediately exhaust > the amount of PIRQs. Using the 'extra_guest_irqs' of course fixes > it but it would be nice to have this be dynamic. > > One idea I had been toying with was that when an device is inserted > into an domain we check how many MSI-X it could have and raise > the nr_pirqs by that. But that would entail some extra logic in > the libxl. And naturally an hypercall to modify the nr_pirqs. > > The other is to evaluate also based on MSI-X - but in the > hypervisor as it already has logic to do figure out MSI-X and such. > > Would appreciate feedback, thoughts, etc.
Growing nr_pirqs at any point would be no problem. The issue I see is making sure it gets shrunk back as needed. In any event I would favor a solution inside the hypervisor over one involving the tool stack. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
