On Thursday 04 February 2010 11:47:13 am Daniel Bareiro wrote: > Hi, Brian. > > On Wednesday, 03 February 2010 16:44:28 -0600, > > Brian Jackson wrote: > > > Anthony Liguori wrote: > > > >>> Are you sure you enabled KVM? Are you sure you are using the KVM > > > >>> binary and not some QEMU binary that's sitting around. This is one > > > >>> of those situations where the KVM command you are running might > > > >>> help. Also the same binary you are running's version ($QEMU_BIN -h > > > >>> > > > >>> | head -n1) > > > >> > > > >> wilson:/usr/local/qemu-kvm/bin# ./qemu-system-x86_64 -h | head -n1 > > > >> QEMU PC emulator version 0.12.2 (qemu-kvm-0.12.2), Copyright (c) > > > >> 2003-2008 Fabrice Bellard > > > >> > > > >> > > > >> The procedure that I used to compile qemu-kvm is the same of always: > > > >> to download qemu-kvm-0.12.2, to install the packages (Debian) > > > >> zlib1g-dev and libpci-dev, and to compile of the following way: > > > >> > > > >> # cd qemu-kvm-0.12.2 > > > >> # ./configure --prefix=/usr/local/qemu-kvm > > > >> # make > > > >> # make install > > > >> > > > >> Until the moment I never got to use qemu-kvm with VMs of more than > > > >> 2048 MB. In an installation that I have with KVM-88 and kernel > > > >> x86_64 I don't have this problem. > > > > > > > > QEMU and KVM only support 2GB of memory on a 32-bit host. > > > > > > > > Both need to create a userspace mapping of the guests memory. In a > > > > 32-bit environment, you only have enough usable address space in a > > > > process to create a 2GB region. > > > > > > But, according to what I read in the link [1] that commented, just by > > > to have a x86_64 kernel would have to be sufficient to serve more than > > > 2047 MB of RAM. > > > > The kvm userspace would also have to be compiled as a 64bit binary. > > Possibly statically compiled somewhere else (if that's even possible) > > or with a 64bit chroot. > > Hmmm... and there is some way to compile qemu-kvm as a 64bit binary on a > operating system userspace of 32bit? I covered two options for doing that in my last email. You either build a static 64bit build on a 64bit host, or you install a 64bit chroot and compile/run from there. > > I tried with ARCH=x86_64 with make but when using this I obtain several > messages of the type "cast to/from pointer from/to integer of different > size". > > Thanks for your reply. > > Regards, > Daniel -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
