Re: [Xen-users] Error migrating HVM DomU in heterogeneous cluster

[Hans van Kranenburg <hans@xxxxxxxxxxx>]

Whoops, forgot to put OP in To and only posted to the list.

On 4/8/19 11:40 PM, Hans van Kranenburg wrote:
> Hi,
> 
> On 4/8/19 6:50 PM, Agustín López wrote:
>>
>> I am trying to live migrate one DomU with Windows HVM between two Dom0s
>> with Debian Buster with Xen 4.11.2-pre and kernel 4.19.0-4-amd64
>> and I always get the error of below (with PV Debian Linux DomU works Ok).
>> The two Dom0s have different CPUs.
> 
> Are those the only two servers you have? The error below looks like a
> toolstack error. Usually (but that's just my been-there-done-that) wrong
> masks show themselves inside the virtual machine after resuming, when
> the VM is using functionality that suddenly disappeared. (Like, console
> full of oops messages etc)
> 
>> I am trying to mask the CPUs with the tool xen_maskcalc.py and
>> configuring the DomU,
> 
> Regardless of what I just said, xen_maskcalc.py should not be used any
> more, and maybe you also found my blog post about xen and cpuid from
> 2014, which is also outdated and technically incorrect nowadays. If
> you're lucky, it works for PV, but HVM has different masks.
> 
> Xen 4.11 has the xen-cpuid program. The output shows different kinds of
> cpuid information.
> 
> Here's a program a colleague in my team at work wrote to calculate
> things based on the xen-cpuid program output:
> 
> http://paste.debian.net/hidden/2bb6a753/
> 
> Also, the new PVH mode uses the same masks as HVM.
> 
> And yes, I should find out how to change that old blog post because it's
> misleading now.
> 
>> but the error go on (see cfg below).
>> The medium is shared, NFS.
>>
>> Can anybody help me?
>>
>> Thanks,
>> Agustin
>>
>> -----------------------------------------------
>> migration target: Ready to receive domain.
>> Saving to migration stream new xl format (info 0x3/0x0/2193)
>> Loading new save file <incoming migration stream> (new xl fmt info
>> 0x3/0x0/2193)
>>  Savefile contains xl domain config in JSON format
>> Parsing config from <saved>
>> xc: info: Saving domain 2, type x86 HVM
>> xc: info: Found x86 HVM domain from Xen 4.11
>> xc: info: Restoring domain
>> xc: error: Mapping pfn 0xaf000 (mfn 0xaf000, type 0) failed with -22:
>> Internal error
>> xc: error: Restore failed (0 = Success): Internal error
>> libxl: error: libxl_stream_read.c:850:libxl__xc_domain_restore_done:
>> restoring domain: Success
>> libxl: error: libxl_create.c:1267:domcreate_rebuild_done: Domain
>> 30:cannot (re-)build domain: -3
>> libxl: error: libxl_domain.c:1034:libxl__destroy_domid: Domain
>> 30:Non-existant domain
>> libxl: error: libxl_domain.c:993:domain_destroy_callback: Domain
>> 30:Unable to destroy guest
>> libxl: error: libxl_domain.c:920:domain_destroy_cb: Domain
>> 30:Destruction of domain failed
>> migration target: Domain creation failed (code -3).
>> libxl: error: libxl_utils.c:510:libxl_read_exactly: file/stream
>> truncated reading ipc msg header from domain 2 save/restore helper
>> stdout pipe
>> libxl: error: libxl_exec.c:129:libxl_report_child_exitstatus: domain 2
>> save/restore helper [9870] died due to fatal signal Broken pipe
>> migration sender: libxl_domain_suspend failed (rc=-3)
>> libxl: info: libxl_exec.c:118:libxl_report_child_exitstatus: migration
>> transport process [9869] exited with error status 1
>> Migration failed, resuming at sender.
>> xc: error: Dom 2 not suspended: (shutdown 0, reason 255): Internal error
>> libxl: error: libxl_dom_suspend.c:472:libxl__domain_resume: Domain
>> 2:xc_domain_resume failed: Invalid argument
>> -----------------------------------------------
>> windows.cfg
>>
>> builder='hvm'
>> memory='4000'
>> shadow_memory=8
>> disk=['file:/Xxxxxxxxxxxxxxx/windows-disk.raw,ioemu:hda,w']
>> name='windows'
>> vif=['type=ioemu,bridge=mybridge,mac=0e:00:00:00:01:1e']
>> vfb=['type=vnc,vnclisten=localhost,vncdisplay=1']
>> boot='c'
>> vcpus=4
>> ne2000=1
>> apic=1
>> acpi=1
>> sdl=0
>> vnc=1
>> pae=1
>> stdvga=0
>> vncconsole=1
>> vncviewer=1
>> vncserver=1
>> nographic=0
>> usbdevice='tablet'
>> serial='pty'
>> #soundhw='sb16'
>> on_poweroff='destroy'
>> on_reboot='restart'
>> on_crash='restart'
>> cpuid = [
>>   "0x00000001:ecx=x000xx000x00xx0xxxxxxxxx00xxxx0x",
>>   "0x00000007,0x00:ebx=xxxxxxxxxxxxxxxxxxxxxx0x0xxxxxx0"
>> ]
>> -----------------------------------------------
> 
> Hans
> 


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