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[Xen-devel] BUG - 'xl restore' does not overwrite HVM


  • To: "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
  • From: Peter McLaren <petermclaren_aus@xxxxxxxxxxx>
  • Date: Tue, 10 Apr 2018 06:07:12 +0000
  • Accept-language: en-AU, en-US
  • Delivery-date: Tue, 10 Apr 2018 06:32:49 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Thread-index: AQHT0JBtqSLCGOHO0E6nIc/TGo22Fw==
  • Thread-topic: BUG - 'xl restore' does not overwrite HVM

Hi
with at least 1 version of Windows 10 (build 16299), the 'xl restore' command does not overwrite the previously running HVM. The symptoms are:
1) the restore appears to rapidly complete after approx 50% of the time
2)  files created after the save in the running HVM are present after the restore
3) the Windows system tries to recover. 

I have tried restoring both with a shutdown of the Windows system or a destroy. In both cases the results are the same.

I have listed some relevant info below. Any help would be appreciated.

Thanks

Peter


My xen config is immediately below and the HVM config below that:
root@debian:~# xl info
host                   : debian
release                : 3.16.0-4-amd64
version                : #1 SMP Debian 3.16.51-3 (2017-12-13)
machine                : x86_64
nr_cpus                : 2
max_cpu_id             : 3
nr_nodes               : 1
cores_per_socket       : 2
threads_per_core       : 1
cpu_mhz                : 2926
hw_caps                : bfebfbff:20100800:00000000:00000900:0408e3bd:00000000:00000001:00000000
virt_caps              : hvm
total_memory           : 4060
free_memory            : 2248
sharing_freed_memory   : 0
sharing_used_memory    : 0
outstanding_claims     : 0
free_cpus              : 0
xen_major              : 4
xen_minor              : 4
xen_extra              : .1
xen_version            : 4.4.1
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
cc_compiler            : gcc (Debian 4.9.2-10) 4.9.2
cc_compile_by          : ian.jackson
cc_compile_domain      : eu.citrix.com
cc_compile_date        : Thu Sep  7 18:01:06 UTC 2017
xend_config_format     : 4

Config:
#kernel=@/usr/lib/xen-4.0/boot/hvmloader@
builder = 'hvm'
memory = 2048
vcpus = 1
name="W10N"
vif = ['bridge=xenbr0']
#disk = ['phy:/dev/vg0/W10N,xvda,w','file:/media/usb/isos/windows10_16299.iso,hdc:cdrom,r']
disk = ['phy:/dev/vg0/W10N,xvda,w','file:/root/windows10_16299.iso,hdc:cdrom,r']
acpi = 1
boot = "cdn"
sdl = 0
serial = 'pty'
usb = 1
keymap="en-gb"
vnc = 1
vnclisten = ''
vncpasswd = ""
root@debian:~#

Peter McLaren

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