Hi,
First sorry for the double posting...
I just built a 2.6.32.10 kernel with Andrew Lyon patches (so it is a
"xenlinux" kernel, not a "pvops" kernel).
Live migration and restore operations are between 4 and 10 times faster
with this kernel . Furthermore, during live migration, hangs time in
domu are shorter (1-2 seconds versus 1 to 15 seconds for a domu with
256M RAM).
Error messages "Error when reading batch size" / "error when buffering
batch, finishing" are still in my logs.
Regarding times, all is now similar to what I had with Xen 3.x on top of
xenlinux kernels.
Regards,
Pierre
Hi all,
I am using Xen 4.0.0 on top of Ubuntu Lucid (amd64), with the Jeremy
kernel taken from git (xen/stable-2.6.32.x branch, 2.6.32.12 when I am
writing this email). This kernel is also used in my domu.
I can save a domu without any problem, but restoring it may need from
2 to 5 minutes, from a 1G checkpoint file (domu has 1GB RAM). There
also errors in /var/log/xen/xend.log, "Error when reading batch size"
and "Error when reading batch size":
[2010-05-08 04:23:16 9497] DEBUG (XendDomainInfo:1804) Storing domain
details: {'image/entry': '18446744071587529216', 'console/port': '2',
'image/loader': 'generic', 'vm':
'/vm/156ea44d-6707-cbe6-2d58-7bea4792dff4',
'control/platform-feature-multiprocessor-suspend': '1',
'image/hv-start-low': '18446603336221196288', 'image/guest-os':
'linux', 'image/virt-base': '18446744071562067968', 'memory/target':
'1048576', 'image/guest-version': '2.6', 'image/pae-mode': 'yes',
'description': '', 'console/limit': '1048576', 'image/paddr-offset':
'0', 'image/hypercall-page': '18446744071578882048',
'image/suspend-cancel': '1', 'cpu/0/availability': 'online',
'image/features/pae-pgdir-above-4gb': '1',
'image/features/writable-page-tables': '0', 'console/type':
'xenconsoled', 'name': 'domusample', 'domid': '10',
'image/xen-version': 'xen-3.0', 'store/port': '1'}
[2010-05-08 04:23:16 9497] DEBUG (XendCheckpoint:286)
restore:shadow=0x0, _static_max=0x40000000, _static_min=0x0,
[2010-05-08 04:23:16 9497] DEBUG (XendCheckpoint:305) [xc_restore]:
/usr/lib/xen/bin/xc_restore 22 10 1 2 0 0 0 0
[2010-05-08 04:23:16 9497] INFO (XendCheckpoint:423) xc_domain_restore
start: p2m_size = 40000
[2010-05-08 04:23:16 9497] INFO (XendCheckpoint:423) Reloading memory
pages: 0%
[2010-05-08 04:25:53 9497] INFO (XendCheckpoint:423) ERROR Internal
error: Error when reading batch size
[2010-05-08 04:25:53 9497] INFO (XendCheckpoint:423) ERROR Internal
error: error when buffering batch, finishing
[2010-05-08 04:25:53 9497] INFO (XendCheckpoint:423)
[2010-05-08 04:25:53 9497] INFO (XendCheckpoint:423) ^H^H^H^H100%
[2010-05-08 04:25:53 9497] INFO (XendCheckpoint:423) Memory reloaded
(0 pages)
[2010-05-08 04:25:53 9497] INFO (XendCheckpoint:423) read VCPU 0
Live migration has the same problem, it may need several minutes to
complete. Please note that restore and migration do not fail, but
there are very long.
My domu is on top of DRBD, and the config file is:
-------------
kernel = '/boot/vmlinuz-2.6.32.12-it-xen'
ramdisk = '/boot/initrd.img-2.6.32.12-it-xen'
memory = '1024'
#
# Disk device(s).
#
root = '/dev/xvda2 ro'
disk = [
'drbd:domusampleswap,xvda1,w',
'drbd:domusampleslash,xvda2,w',
]
#
# Hostname
#
name = 'domusample'
#
# Networking
#
vif = [ 'mac=00:16:3E:58:FC:F9' ]
#
# Behaviour
#
on_poweroff = 'destroy'
on_reboot = 'restart'
on_crash = 'restart'
extra = '2 console=hvc0'
----------
I do not have any idea here.
Did somebody already have (and solve ?) this issue ?
Thanks.
Pierre
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