[Xen-users] fail to migrate xen 4.1pv guest to xen 4.3

[Cyrus Tam <cyrustam@xxxxxxxxx>]

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    I have a Fedora 17 running Xen 4.1.4-4 and 5 PV Fedora17 guest, it is
    running fine,
    # xl info
    host : xen01
    release : 3.3.4-5.fc17.x86_64
    version : #1 SMP Mon May 7 17:29:34 UTC 2012
    machine : x86_64
    nr_cpus : 12
    nr_nodes : 1
    cores_per_socket : 6
    threads_per_core : 2
    cpu_mhz : 2000
    hw_caps :
    bfebfbff:2c100800:00000000:00003f40:13bee3ff:00000000:00000001:00000000
    virt_caps : hvm hvm_directio
    total_memory : 24498
    free_memory : 4150
    free_cpus : 0
    xen_major : 4
    xen_minor : 1
    xen_extra : .4
    xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p

- Ignored:
    hvm-3.0-x86_64
    xen_scheduler : credit
    xen_pagesize : 4096
    platform_params : virt_start=0xffff800000000000
    xen_changeset : unavailable
    xen_commandline : placeholder dom0_max_vcpus=4 dom0_vcpus_pin
    cc_compiler : gcc version 4.7.2 20120921 (Red Hat 4.7.2-2) (GCC)
    cc_compile_by : mockbuild
    cc_compile_domain : [unknown]
    cc_compile_date : Wed Feb 6 21:24:13 UTC 2013
    xend_config_format : 4


    I have a new machine with more memory and cpu
    I installed Fedora 20 host with Xen 4.3.2-1, guest running PV Fedora20
    without any problem.

    # xl info
    host : xen02
    release : 3.11.10-301.fc20.x86_64
    version : #1 SMP Thu Dec 5 14:01:17 UTC 2013
    machine : x86_64
    nr_cpus : 32
    max_cpu_id : 63
    nr_nodes : 2
    cores_per_socket : 8
    threads_per_core : 2
    cpu_mhz : 2194
    hw_caps :
    bfebfbff:2c100800:00000000:00003f00:17bee3ff:00000000:00000001:00000000
    virt_caps : hvm hvm_directio
    total_memory : 98269
    free_memory : 5486
    sharing_freed_memory : 0
    sharing_used_memory : 0
    outstanding_claims : 0
    free_cpus : 0
    xen_major : 4
    xen_minor : 3
    xen_extra : .2
    xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p
    hvm-3.0-x86_64
    xen_scheduler : credit
    xen_pagesize : 4096
    platform_params : virt_start=0xffff800000000000
    xen_changeset :
    xen_commandline : placeholder dom0_max_vcpus=6 dom0_vcpus_pin
    cc_compiler : gcc (GCC) 4.8.2 20131212 (Red Hat 4.8.2-7)
    cc_compile_by : mockbuild
    cc_compile_domain : [unknown]
    cc_compile_date : Tue Feb 18 21:00:14 UTC 2014
    xend_config_format : 4


    now I want to migrate these five PV FC17 to new machine,

    I using dd to dump the logical volume to new machine, and try to start the
    domainU, but it crash repeatedly.

    # cat fc17.cfg
    name = "fc17"
    memory = 4096
    vcpus = 4
    bootloader = "pygrub"
    localtime = 0
    on_poweroff = "destroy"
    on_reboot = "restart"
    on_crash = "restart"
    vfb = [ 'type=vnc,vncdisplay=6,vnclisten=0.0.0.0,vncpasswd=password' ]
    vnc = 1
    vncunused = 0
    vncdisplay = 3
    disk = [ "phy:/dev/vg01/vg01_fc17,xvda,w" ]
    vif = [ "bridge=xenbrdum,script=vif-bridge" ]
    parallel = "none"
    serial = "none"



    # xl create fc17.cfg
    Parsing config from fc17.cfg
    Daemon running with PID 4778
    #



    # xl vncviewer fc17
    fc17 is an invalid domain identifier (rc=-6)


    # xl list
    Name ID Mem VCPUs State Time(s)
    Domain-0 0 81244 6 r----- 1857.5
    fc17 22 0 0 --p--- 0.0

    # xl list
    Name ID Mem VCPUs State Time(s)
    Domain-0 0 81244 6 r----- 1859.7
    fc17 22 4096 1 --psc- 0.4


    # cat qemu-dm-fc17.log
    domid: 5
    Warning: vlan 0 is not connected to host network
    -videoram option does not work with cirrus vga device model. Videoram set
    to 4M.
    
/builddir/build/BUILD/xen-4.3.2/tools/qemu-xen-traditional/hw/xen_blktap.c:628:
    Init blktap pipes
    Could not open /var/run/tap/qemu-read-5
    xs_read(): target get error. /local/domain/5/target.


    I can open the console sometimes by "xl console fc17" and see the pygrub
    menu, after I wait for timeout, it tried to boot to PV guest but failed
    it seems crash and restart again


    Am I missing something??


    Thanks

    Cyrus

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