Il 11/12/2013 16:45, Igor Mammedov ha scritto: >> > I'm not sure if it is fixable. You need a 2M mountpoint to bind the 3G-4G >> > range correctly, a 1G mountpoint for everything else, and QEMU only allows >> > to specify one path. > we could do it with hugepage memdev backend. > something like: > > -object hugepage-ram,id=mem1gb,size=3G,host-node=0,mem-path=/1gb-hugepage-fs > -device dimm,id=hp1g,memdev=mem1gb,node=0 > -object > hugepage-ram,id=mem2mb,size=500Mb,host-node=1,mem-path=/2mb-hugepage-fs > -device dimm,id=hp2mb,memdev=mem2mb,node=1 > > that basically would allow to distribute initial memory in any way user would > like.
If you allow for DIMMs, you can just use a small initial amount of memory (2GB), and cold-plug DIMMs at 4GB. Then you get exactly the same result as Gerd's patch. :) But the beauty of Marcelo's idea was that the user didn't need to do anything, and the guest did not see anything. It's a great approach for backwards-compatibility, no doubt about that. Paolo
