Re: [Xen-devel] Problems with xen 4.2

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Mon, 2 Apr 2012, Fantu wrote:
> Fantu wrote
> > 
> > 
> > Fantu wrote
> >> 
> >> For many years we used virtualization systems based on xen.
> >> Up to now we did quite well despite same issue we are trying to solve
> >> with the new version.
> >> The main issue that we found are about Windows domU performance and the
> >> thin client interface with rdp is sometimes problematic.
> >> We think a possible solution to solve current shortcomings could be qemu
> >> upstream with spice, qxl and USB redirection.
> >> We have started preparing a new test system based on Wheezy, the upstream
> >> kernel and xen 4.2.
> >> The current test system is:
> >> Wheezy 64 bit with kernel from package linux-image-3.2.0-2-amd64 version
> >> 3.2.12-1, package blktap-dkms and all dependency packages for xen spice
> >> and usb redirection.
> >> -------------------------
> >> /etc/modules
> >> ------------
> >> loop max_loop=64
> >> xenfs
> >> xen-evtchn
> >> blktap
> >> -------------------------
> >> hg clone http://xenbits.xen.org/xen-unstable.hg (last build changeset
> >> 25070)
> >> vi Makefile # removed dist-kernel to not compile kernel
> >> -------------------------
> >> vi Config.mk # qemu upstream unstable and seabios unstable
> >> ------------
> >> QEMU_UPSTREAM_URL ?= git://git.qemu.org/qemu.git
> >> SEABIOS_UPSTREAM_URL ?= git://git.seabios.org/seabios.git
> >> SEABIOS_UPSTREAM_TAG ?= master
> >> QEMU_TAG ?= master
> >> -------------------------
> >> Added some patches:
> >> - autoconf: add variable for pass arbitrary options to qemu upstream - my
> >> patch to build spice and usbredirection on qemu upstream
> >> - QEMU upstream need to kown the amount of RAM given to a guest. This
> >> patch give
> >> the correct value. - Anthony PERARD patch for try to solve ram/videoram
> >> issue
> >> - tools: specify datadir for qemu-xen build to fix firmware loading -
> >> Olaf Hering patch for try to solve qxl issue
> >> -------------------------
> >> ./configure QEMUU_ADD_PAR="--enable-spice --enable-usb-redir"
> >> -------------------------
> >> vi config/Tools.mk # workaround for libxl compilation problem
> >> BISON               := bison
> >> FLEX                := flex
> >> -------------------------
> >> make dist
> >> ./install.sh
> >> insserv xencommons &&
> >> insserv xendomains
> >> 
> >> 
> >> Result:
> >> Full PV domU work, just minimal tests done.
> >> HVM domU with qemu traditional works but with qemu upstream some problem
> >> encountered.
> >> For now I didn't find a way to make Windows run on qemu upstream and
> >> nothing on logs.
> >> About Linux domU HVM I tried with Precise (Ubuntu 12.04 LTS).
> >> Spice and usbrediction seem to be working in basic test done now, qxl
> >> not.
> >> 
> >> About qxl vga with qemu from xen repository (1.0.1) qemu hangs on start,
> >> with qemu unstable it starts but with an allocation problem, on xorg log:
> >> Out of video memory: Could not allocate 4198400 bytes
> >> I tried to update also seabios to unstable but same problem.
> >> Is the patch incomplete or is there videoram fixed limit to 4 MB? 
> >> 
> >> Current xl domU configuration file:
> >> -----------------------------------
> >> name='PRECISEHVM'
> >> builder="hvm"
> >> memory=1024
> >> #maxmem=1536
> >> vcpus=2
> >> #hap=1
> >> #pae=1
> >> #acpi=1
> >> #apic=1
> >> #nx=1
> >> vif=['bridge=xenbr0']
> >> #vfb=['vnc=1,vncunused=1,vnclisten="0.0.0.0",keymap="it"']
> >> #disk=['/mnt/vm/disks/PRECISEHVM.disk1.xm,raw,hda,rw',
> >> '/dev/sr0,raw,hdb,ro,cdrom']
> >> disk=['/mnt/vm/disks/PRECISEHVM.disk1.xm,raw,hda,rw']
> >> boot='c'
> >> xen_platform_pci=1
> >> device_model_version='qemu-xen'
> >> vnc=0
> >> #vncunused=1
> >> #vnclisten="0.0.0.0"
> >> #keymap="it"
> >> #stdvga=1
> >> #sdl=0
> >> spice=1
> >> spicehost='0.0.0.0'
> >> spiceport=6000
> >> spicedisable_ticketing=1
> >> #spicepasswd='test'
> >> device_model_override="/usr/lib/xen/bin/qemu-debug.sh"
> >> #device_model_args=["-vga qxl -global qxl-vga.vram_size=33554432"]
> >> device_model_args=["-vga qxl"]
> >> #device_model_args=["-usb -device usb-ehci"]
> >> #on_crash='preserve'
> >> videoram=128
> >> #bios="ovmf"
> >> #device_model_args=["-readconfig /etc/xen/ich9-ehci-uhci.cfg",
> >>         "-chardev spicevmc,name=usbredir,id=usbredirchardev1 -device
> >> usb-redir,chardev=usbredirchardev1,id=usbredirdev1,bus=ehci.0,debug=3",
> >>         "-chardev spicevmc,name=usbredir,id=usbredirchardev2 -device
> >> usb-redir,chardev=usbredirchardev2,id=usbredirdev2,bus=ehci.0,debug=3",
> >>         "-chardev spicevmc,name=usbredir,id=usbredirchardev3 -device
> >> usb-redir,chardev=usbredirchardev3,id=usbredirdev3,bus=ehci.0,debug=3"]
> >> -----------------------------------
> >> 
> >> Can someone help to solve these issues?
> >> Thanks for any reply.
> >> 
> > Today I have done other tests: windows xp sp3 installs and runs
> > successfully on qemu upstream unstable.
> > Vnc working but too slow, with stdvga improved but not optimal.
> > Spice with qxl is working but with slow graphic performance. It seems to
> > have only 4 mb videoram usable (seem to be same with Precise, see quote).
> > 
> > This is the current xl configuration:
> > -------------------------------------
> > name='XP'
> > builder="hvm"
> > memory=1024
> > vcpus=2
> > hap=1
> > pae=1
> > acpi=1
> > apic=1
> > nx=1
> > vif=['bridge=xenbr0']
> > #vfb=['vnc=1,vncunused=1,vnclisten=0.0.0.0,keymap=it']
> > disk=['/mnt/vm/disks/XP.disk1.xm,raw,hda,rw']
> > boot='d'
> > xen_platform_pci=1
> > viridian=1
> > device_model_version="qemu-xen"
> > device_model_override="/usr/lib/xen/bin/qemu-debug.sh"
> > vnc=0
> > #vncunused=1
> > #vnclisten="0.0.0.0"
> > #keymap="it"
> > spice=1
> > spicehost="0.0.0.0"
> > spiceport=6000
> > spicedisable_ticketing=1
> > on_poweroff="destroy"
> > on_reboot="restart"
> > on_crash="destroy"
> > stdvga=0
> > device_model_args=["-vga qxl"]
> > videoram=128
> > -------------------------------------
> > 
> Also Windows 7 is working with qemu upstream, with patches and workaround
> applied probably, for details see the first post.

Thank you very much for testing!
Would you be up for writing a wiki.xen.org page about how to use SPICE
with Xen?

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