Paolo Bonzini writes:
> On 11/03/19 10:26, Sergio Lopez wrote: >> I guess this is a consequence of having to reset/rebuild the Flatview >> when altering the PCI BAR regions. >> >> Is this a known issue we're already working on? > > What version of QEMU is this? This upstream as of 6cb4f6db4f4367f (Mar 07 2019). > The initialization is O(n^2) because the guest initializes one device at > a time, so you rebuild the FlatView first with 0 devices, then 1, then > 2, etc. This is very hard to fix, if at all possible. > > However, each FlatView creation should be O(n) where n is the number of > devices currently configured. Please check with "info mtree -f" that > you only have a fixed number of FlatViews. Old versions had one per device. I'm seeing 9 FVs with 1 PCI, and 119 with 100 PCIs. Thanks, Sergio.
