On Tue, Jul 16, 2013 at 08:19:48AM +0200, Paolo Bonzini wrote: > Il 16/07/2013 03:27, Hu Tao ha scritto: > > > I think it's the same. One "-numa mem" option = one "-device dimm" > > > option; both define one range. Unused memory ranges may remain if you > > > stumble upon a unusable range such as the PCI window. For example two > > > "-numa mem,size=2G" options would allocate memory from 0 to 2G and from > > > 4 to 6G. > > > > So we can drop -dimm if we agree on -numa mem? > > Yes, the point of the "-numa mem" proposal was to avoid the concept of a > "partially initialized device" that you had for DIMMs. > > BTW, how do you specify which module you are plugging in? I.e., what if > I have three 1G ranges at 0, 1G and 2G, and I want to plug the first and > the third?
I think an id is still needed to identify ranges, which can be shown to user with `info numa' or similar command, along with the corresponding ranges. > > This is especially important with hot-unplug, because then you can have > this kind of hole in the address space. If you migrate the VM, you have > to reproduce the situation in the destination command line. > > Paolo >
