Re: [Libvir] Error when paravirtualization domain starts with virsh.
Hi,
I confirm it's a Xen bug. I can reproduce the problem with a regular Xen
config file.
The file is as follow:
[root@diane-int6 xen]# cat xen1
kernel = "/boot/efi/efi/redhat/vmlinuz-2.6.18-8.el5xen"
ramdisk = "/boot/efi/efi/redhat/initrd-2.6.18-8.el5xenU.img"
maxmem = 512
memory = 431
name = "xen1"
cpus = "0-2,4,^1"
vcpus = 2
vif = [ '' ]
disk = [ 'phy:/dev/sda4,hda1,w' ]
root = "/dev/hda1 ro"
extra = "console=tty0 nomca 3 ide0=noprobe ide1=noprobe ide2=noprobe
ide3=noprobe"
[root@diane-int6 xen]# xm create xen1
Using config file "./xen1".
Xend has probably crashed! Invalid or missing HTTP status code.
[root@diane-int6 xen]# xm list
Name ID Mem(MiB) VCPUs State Time(s)
Domain-0 0 1008 1 r----- 123.5
Domain-2 2 431 1 --p--- 0.0
[root@diane-int6 xen]#
A domain named Domain-2 is created instead of xen1.
The Xend log shows that Xend died due to signal 11 and then is restarted.
Regards.
----- Original Message -----
From: "Daniel P. Berrange" <berrange(a)redhat.com>
To: "Michel Gauthier" <Michel.Gauthier(a)bull.net>
Cc: <libvir-list(a)redhat.com>
Sent: Monday, March 05, 2007 5:56 PM
Subject: Re: [Libvir] Error when paravirtualization domain starts with
virsh.
On Mon, Mar 05, 2007 at 11:19:03AM +0100, Michel Gauthier wrote:
> With the RHEL5 RC distribution on our IA64 platform (4 CPUs), when we
> use
> virsh to start a paravirtuailzation domain, we've got the following:
>
> virsh # list
> Id Name State
> ----------------------------------
> 0 Domain-0 running
>
> virsh # create hndom2
> Failed to get devices for domain hndom2
> error: Failed to create domain from hndom2
>
> virsh # list
> Id Name State
> ----------------------------------
> 0 Domain-0 running
> 24 Domain-24 paused
>
> In spite of an error message, a domain named Domain-Id is created instead
> of the hndom2 domain.
Yeah, that's a bug in libvirt - we failed to tear down the 'still born'
domain when something goes wrong during creation.
> If the <currentMemory> tag is suppressed from the XML configuration file,
> all is OK.
Sounds like a bug in Xen ia64 to me - the <currentMemory> is used to set
the initial boot RAM, while the <memory> tag is used to set the maximum
reservation. If you omit <currentMemory> then both will be set to the same
value. It sounds like Xen ia64 is not able to cope with the memory <
maxmem
situation.
memory=200
maxmem=500
> This behaviour appears with the libvirt version 0.1.8 released with the
> RHEL5 RC, and also with the libvirt version 0.1.10.
> Are you aware of this problem?
No - we don't do much (any) testing on ia64 due to lack of any suitable
hardware for testing, so we pretty much rely on community/vendors to
identify ia64 problems.
> If you want some complementary infos (xend log), we can send it to you.
See if you can reproduce it with a regular Xen config file using config
options like
memory=200
maxmem=500
Which should simlute presece of '<currentMemory>' element. If you can
reproduce it there, its a Xen bug.
Regards,
Dan.
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