[Xen-bugs] [Bug 1064] New: HVM guest fails to save

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1064

           Summary: HVM guest fails to save
           Product: Xen
           Version: 3.0.3
          Platform: x86-64
        OS/Version: Linux
            Status: NEW
          Severity: critical
          Priority: P2
         Component: HVM
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: jens@xxxxxxxxxxx


I have a HVM guest domain on a x86-64 platform, which also runs a 64-bit
installation, and it consistently fails to save. I get into the same problem
when trying to save a 32-bit HVM machine (a legacy Centos 4.1 server).
Installation is a CentOS 5.0 (package xen-3.0.3-25.0.3.el5).

Another guest running para-virtualized CentOS 5.0 on the same machine saves and
restores perfectly.

The log file indicates:
====================================================================
[2007-09-13 11:03:36 xend 2906] DEBUG (XendCheckpoint:83) [xc_save]:
/usr/lib64/xen/bin/xc_save 17 11 0 0 0
[2007-09-13 11:03:36 xend 2906] INFO (XendCheckpoint:239) Couldn't map
p2m_frame_list_list (errno 14): 14
[2007-09-13 11:03:36 xend 2906] INFO (XendCheckpoint:239) Save exit rc=1
[2007-09-13 11:03:36 xend 2906] ERROR (XendCheckpoint:106) Save failed on
domain hvm64bit (11).
Traceback (most recent call last):
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py", line
100, in save
    forkHelper(cmd, fd, saveInputHandler, False)
  File "/usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py", line
227, in forkHelper
    raise XendError("%s failed" % string.join(cmd))
====================================================================

My config file:
====================================================================
# Automatically generated xen config file
name = "hvm64bit"
builder = "hvm"
memory = "500"
disk = [ 'file:/home/ekeko/disk-1,hda,w', ]
vif = [ 'type=ioemu, mac=00:16:3e:69:21:f5, bridge=xenbr0', ]
uuid = "f2d3b57b-83a9-8266-52da-2e16f8e34030"
device_model = "/usr/lib64/xen/bin/qemu-dm"
kernel = "/usr/lib/xen/boot/hvmloader"
vnc=1
vncunused=1
apic=1
acpi=1
pae=1

vcpus=1
serial = "pty" # enable serial console
on_reboot   = 'restart'
on_crash    = 'restart'
====================================================================

The saved state file content after the crash contains (with no end of line at
the end):
====================================================================
LinuxGuestRecord^@^@^C<BD>(domain (domid 11) (uuid
f2d3b57b-83a9-8266-52da-2e16f
8e34030) (vcpus 1) (vcpu_avail 1) (cpu_weight 1.0) (memory 500) (shadow_memory
3
) (maxmem 500) (features ) (name hvm64bit) (on_poweroff destroy) (on_reboot
rest
art) (on_crash restart) (image (hvm (kernel /usr/lib/xen/boot/hvmloader)
(device
_model /usr/lib64/xen/bin/qemu-dm) (pae 1) (vcpus 1) (boot c) (serial pty) (vnc 
1) (vncunused 1) (display localhost:10.0) (xauthority /root/.Xauthority) (acpi
1
) (apic 1) (vncpasswd 'None'))) (device (vif (backend 0) (script vif-bridge)
(br
idge xenbr0) (mac 00:16:3e:69:21:f5) (type ioemu))) (device (vbd (backend 0)
(de
v hda:disk) (uname file:/home/ekeko/disk-1) (mode w))) (device (vkbd (backend
0)
)) (device (vfb (backend 0) (type vnc) (vncunused 1) (display localhost:10.0)
(x
authority /root/.Xauthority))) (state -b----) (shutdown_reason poweroff)
(cpu_ti
me 51.185280191) (online_vcpus 1) (up_time 115.631419182) (start_time
1189695701
.3) (store_mfn 238998))
====================================================================


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