On Wednesday 03 February 2010 02:06:53 pm Daniel Bareiro wrote: > Hi, Anthony. > > On Wednesday, 03 February 2010 13:20:12 -0600, > > 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. > Regards, > Daniel > > [1] > https://help.ubuntu.com/community/KVM/Installation#Use%20a%2064%20bit%20ke > rnel%20if%20possible -- 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
