On Mon, Feb 10, 2025 at 03:58:00PM -0500, Pasha Tatashin wrote: > > > > > +What: /sys/kernel/kho/dt_max > > > +Date: December 2023 > > > +Contact: Alexander Graf <graf@xxxxxxxxxx> > > > +Description: > > > + KHO needs to allocate a buffer for the DT that gets > > > + generated before it knows the final size. By default, it > > > + will allocate 10 MiB for it. You can write to this file > > > + to modify the size of that allocation. > > > > Seems gross, why can't it use a non-contiguous page list to generate > > the FDT? :\ > > We will consider some of these ideas in the future version. I like the > idea of using preserved memory to carry sparse KHO tree: i.e FDT over > sparse memory, maybe use the anchor page to describe how it should be > vmapped into a virtually contiguous tree in the next kernel? Yeah, but this is now permanent uAPI that has to be kept forever. I think you should not add this when there are enough ideas on how to completely avoid it. Jason
