On Tue, Feb 13, 2024 at 12:24:22PM +0100, Eric Auger wrote: > Hi Michael, > On 2/13/24 12:09, Michael S. Tsirkin wrote: > > On Tue, Feb 13, 2024 at 11:32:13AM +0100, Eric Auger wrote: > >> Do you have an other concern? > > I also worry a bit about migrating between hosts with different > > page sizes. Not with kvm I am guessing but with tcg it does work I think? > I have never tried but is it a valid use case? Adding Peter in CC. > > Is this just for vfio and vdpa? Can we limit this to these setups > > maybe? > I am afraid we know the actual use case too later. If the VFIO device is > hotplugged we have started working with 4kB granule. > > The other way is to introduce a min_granule option as done for aw-bits. > But it is heavier. > > Thanks > > Eric > >
Let's say, if you are changing the default then we definitely want a way to get the cmpatible behaviour for tcg. So the compat machinery should be user-accessible too and documented. -- MST
