[CentOS-virt] new install of Xen 4.6 hangs on Loading initial ramdisk
First post to this list. I would appreciate some help on this issue.
As background, I installed CentOS 7 on a Dell server, and then ran the
following commands:
yum update
http://buildlogs.centos.org/centos/7/virt/x86_64/xen/centos-release-xen-7-11.el7.x86_64.rpm
yum --enablerepo=centos-virt-xen-testing update
yum --enablerepo=centos-virt-xen-testing install xen
Doing that, I was able to successfully install Xen, create a virtual machine
with its own HVM setup, logical volume, etc. and boot it just fine.
I then tried to do the same on an IBM x3550 server I’m trying to install with
CentOS 7. The CentOS 7 install went just fine. I can boot into the standard
kernel and have a working machine. But after running the commands above to
install the Xen hypervisor, the machine hangs on boot for a few moments after
displaying the lines below and then reboots in a loop over and over and over:
Loading Xen 4.6.0-2.el7 …
Loading Linux 3.18.21-16.el7.x86_64 …
Loading initial ramdisk …
It never gets beyond that. If I choose the stock kernel (no Xen) from the Grub
menu, it will continue to boot into that just fine.
My grub.cfg file has these entries of note:
multiboot /xen-4.6.0-2.el7.gz placeholder dom0_mem=1024M,max:1024M
cpuinfo com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all
${xen_rm_opts}
echo'Loading Linux 3.18.21-16.el7.x86_64 ...'
module /vmlinuz-3.18.21-16.el7.x86_64 placeholder
root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde ro crashkernel=auto debug
irqpoll ipv6.disable=1 console=hvc0 earlyprintk=xen nomodeset
echo'Loading initial ramdisk ...'
module --nounzip /initramfs-3.18.21-16.el7.x86_64.img
What I have tried:
1) adding debug into the vmlinuz line
2) disabling ipv6 in that line
3) adding root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde to the last line AFTER
/initramfs ….
Nothing so far has made any difference. Obviously the process works, as it
works for me just fine on the Dell server.
Underlying this machine is a SATA RAID 1 PCI card with two SSD drives attached
in a RAID 1 mirror. Not that that should matter, but I’m including it for
reference. As noted previously, it boots into the stock kernel just fine.
Any help would be appreciated.
--
Craig Thompson, President
Caldwell Global Communications, Inc.
423-559-5465
This message has been scanned by
WingNET for spam & virus content.
If you get spam regularly, contact us at
sa...@wingnet.net for e-mail filtering.
___
CentOS-virt mailing list
CentOS-virt@centos.org
https://lists.centos.org/mailman/listinfo/centos-virt
[CentOS-virt] new install of Xen 4.6 hangs on Loading initial ramdisk
Not sure if this actually made it to the list the first time.
Here is the SERIAL output (bottom of message after your questions). Googling
the error indicates it's something people ran into a few years back but was
supposedly fixed. Any ideas?
I can verify that if I REMOVE the second CPU, it boots into Xen kernel no
problem. The CPU itself doesn't matter, as I can swap either CPU into the
first slot, and it boots. Only if there is a second CPU does it fail.
-Original message-
From: George Dunlap
Sent: Monday 30th November 2015 6:00
To: Discussion about the virtualization on CentOS
Subject: Re: [CentOS-virt] new install of Xen 4.6 hangs on Loading initial
ramdisk
On Fri, Nov 27, 2015 at 11:18 PM, Craig Thompson mailto:presid...@caldwellglobal.com> > wrote:
First post to this list. I would appreciate some help on this issue.
As background, I installed CentOS 7 on a Dell server, and then ran the
following commands:
yum update
http://buildlogs.centos.org/centos/7/virt/x86_64/xen/centos-release-xen-7-11.el7.x86_64.rpm
<http://buildlogs.centos.org/centos/7/virt/x86_64/xen/centos-release-xen-7-11.el7.x86_64.rpm>
yum --enablerepo=centos-virt-xen-testing update
yum --enablerepo=centos-virt-xen-testing install xen
Doing that, I was able to successfully install Xen, create a virtual machine
with its own HVM setup, logical volume, etc. and boot it just fine.
I then tried to do the same on an IBM x3550 server I’m trying to install with
CentOS 7. The CentOS 7 install went just fine. I can boot into the standard
kernel and have a working machine. But after running the commands above to
install the Xen hypervisor, the machine hangs on boot for a few moments after
displaying the lines below and then reboots in a loop over and over and over:
Loading Xen 4.6.0-2.el7 …
Loading Linux 3.18.21-16.el7.x86_64 …
Loading initial ramdisk …
It never gets beyond that. If I choose the stock kernel (no Xen) from the Grub
menu, it will continue to boot into that just fine.
My grub.cfg file has these entries of note:
multiboot /xen-4.6.0-2.el7.gz placeholder dom0_mem=1024M,max:1024M cpuinfo
com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all ${xen_rm_opts}
echo 'Loading Linux 3.18.21-16.el7.x86_64 ...'
module /vmlinuz-3.18.21-16.el7.x86_64 placeholder
root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde ro crashkernel=auto debug
irqpoll ipv6.disable=1 console=hvc0 earlyprintk=xen nomodeset
echo 'Loading initial ramdisk ...'
module --nounzip /initramfs-3.18.21-16.el7.x86_64.img
What I have tried:
1) adding debug into the vmlinuz line
2) disabling ipv6 in that line
3) adding root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde to the last line AFTER
/initramfs ….
Nothing so far has made any difference. Obviously the process works, as it
works for me just fine on the Dell server.
Underlying this machine is a SATA RAID 1 PCI card with two SSD drives attached
in a RAID 1 mirror. Not that that should matter, but I’m including it for
reference. As noted previously, it boots into the stock kernel just fine.
Any help would be appreciated.
Thanks for the testing and the report.
Have you tried booting the Xen4CentOS kernel (Linux-3.18.21-16) by itself
(i.e., not under Xen)?
Also, is there any chance you could get the output of a serial console? That's
pretty critical for debugging this sort of thing.
CentOS-virt mailing list
### No such file or directory opening port
(XEN) Bad console= option 'tty'
Xen 4.6.0-2.el7
(XEN) Xen version 4.6.0-2.el7 (mockbu...@centos.org) (gcc (GCC) 4.8.3 20140911
(Red Hat 4.8.3-9)) debug=n Tue Nov 3 17:23:39 UTC 2015
(XEN) Latest ChangeSet: Mon Oct 19 12:05:21 2015 +0100 git:36b6fe9-dirty
(XEN) Bootloader: GRUB 2.02~beta2
(XEN) Command line: placeholder dom0_mem=1024M,max:1024M cpuinfo
com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all
(XEN) Video information:
(XEN) VGA is text mode 80x25, font 8x16
(XEN) VBE/DDC methods: V2; EDID transfer time: 2 seconds
(XEN) Disc information:
(XEN) Found 1 MBR signatures
(XEN) Found 1 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN) - 0009c800 (usable)
(XEN) 0009c800 - 000a (reserved)
(XEN) 000e - 0010 (reserved)
(XEN) 0010 - bffcba40 (usable)
(XEN) bffcba40 - bffcee00 (ACPI data)
(XEN) bffcee00 - c000 (reserved)
(XEN) fec0 - 0001 (reserved)
(XEN) 0001 - 0001fee0 (usable)
(XEN) 0001fee0 - 0001fef0 (reserved)
(XEN) 0001fef0 - 0002fee0 (usable)
(XEN) 0002fee0 - 0002fef0 (reserved)
(XEN) 0002fef0 - 0003fee0 (usable)
(XEN) 0003fee0 - 0003fef0 (reserved)
(XEN) 0003fef0 - 00084000 (usable)
(XEN) ACPI: RSDP 000FD
Re: [CentOS-virt] new install of Xen 4.6 hangs on Loading initial ramdisk
On Fri, Nov 27, 2015 at 06:18:05PM -0500, Craig Thompson wrote:
>First post to this list. I would appreciate some help on this issue.
>As background, I installed CentOS 7 on a Dell server, and then ran the
>following commands:
>yum update
>
> [1]http://buildlogs.centos.org/centos/7/virt/x86_64/xen/centos-release-xen-7-11.el7.x86_64.rpm
>yum --enablerepo=centos-virt-xen-testing update
>yum --enablerepo=centos-virt-xen-testing install xen
>Doing that, I was able to successfully install Xen, create a virtual
>machine with its own HVM setup, logical volume, etc. and boot it just
>fine.
>I then tried to do the same on an IBM x3550 server I*m trying to install
>with CentOS 7. The CentOS 7 install went just fine. I can boot into the
>standard kernel and have a working machine. But after running the
>commands above to install the Xen hypervisor, the machine hangs on boot
>for a few moments after displaying the lines below and then reboots in a
>loop over and over and over:
>Loading Xen 4.6.0-2.el7 *
>Loading Linux 3.18.21-16.el7.x86_64 *
>Loading initial ramdisk *
>It never gets beyond that.
>
Weird. So you don't see any output from Xen?
I guess that means GRUB gets stuck somehow, and doesn't even get to actually
starting Xen..
> If I choose the stock kernel (no Xen) from the
>Grub menu, it will continue to boot into that just fine.
>My grub.cfg file has these entries of note:
> multiboot /xen-4.6.0-2.el7.gz placeholder
>dom0_mem=1024M,max:1024M cpuinfo com1=115200,8n1 console=com1,tty
>loglvl=all guest_loglvl=all ${xen_rm_opts}
>echo'Loading Linux 3.18.21-16.el7.x86_64 ...'
>module /vmlinuz-3.18.21-16.el7.x86_64 placeholder
>root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde ro crashkernel=auto debug
>irqpoll ipv6.disable=1 console=hvc0 earlyprintk=xen nomodeset
>echo'Loading initial ramdisk ...'
>module --nounzip /initramfs-3.18.21-16.el7.x86_64.img
>What I have tried:
>1) adding debug into the vmlinuz line
>2) disabling ipv6 in that line
>3) adding root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde to the last line
>AFTER /initramfs *.
>Nothing so far has made any difference. Obviously the process works, as
>it works for me just fine on the Dell server.
>Underlying this machine is a SATA RAID 1 PCI card with two SSD drives
>attached in a RAID 1 mirror. Not that that should matter, but I*m
>including it for reference. As noted previously, it boots into the stock
>kernel just fine.
>Any help would be appreciated.
>
Yeah it's not about options to Xen and/or Linux when GRUB fails to boot the
entry in the first place..
Is this UEFI setup? Or legacy-BIOS? Did you try playing with the BIOS options?
-- Pasi
>--
>Craig Thompson, President
>Caldwell Global Communications, Inc.
>423-559-5465
>
___
CentOS-virt mailing list
CentOS-virt@centos.org
https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] new install of Xen 4.6 hangs on Loading initial ramdisk
On Fri, Nov 27, 2015 at 11:18 PM, Craig Thompson <
presid...@caldwellglobal.com> wrote:
> First post to this list. I would appreciate some help on this issue.
>
> As background, I installed CentOS 7 on a Dell server, and then ran the
> following commands:
>
> yum update
> http://buildlogs.centos.org/centos/7/virt/x86_64/xen/centos-release-xen-7-11.el7.x86_64.rpm
> yum --enablerepo=centos-virt-xen-testing update
> yum --enablerepo=centos-virt-xen-testing install xen
>
> Doing that, I was able to successfully install Xen, create a virtual
> machine with its own HVM setup, logical volume, etc. and boot it just fine.
>
> I then tried to do the same on an IBM x3550 server I’m trying to install
> with CentOS 7. The CentOS 7 install went just fine. I can boot into the
> standard kernel and have a working machine. But after running the commands
> above to install the Xen hypervisor, the machine hangs on boot for a few
> moments after displaying the lines below and then reboots in a loop over
> and over and over:
>
> Loading Xen 4.6.0-2.el7 …
> Loading Linux 3.18.21-16.el7.x86_64 …
> Loading initial ramdisk …
>
> It never gets beyond that. If I choose the stock kernel (no Xen) from the
> Grub menu, it will continue to boot into that just fine.
>
> My grub.cfg file has these entries of note:
>
> multiboot /xen-4.6.0-2.el7.gz placeholder dom0_mem=1024M,max:1024M
> cpuinfo com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all
> ${xen_rm_opts}
> echo'Loading Linux 3.18.21-16.el7.x86_64 ...'
> module /vmlinuz-3.18.21-16.el7.x86_64 placeholder
> root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde ro crashkernel=auto debug
> irqpoll ipv6.disable=1 console=hvc0 earlyprintk=xen nomodeset
> echo'Loading initial ramdisk ...'
> module --nounzip /initramfs-3.18.21-16.el7.x86_64.img
>
>
> What I have tried:
>
> 1) adding debug into the vmlinuz line
> 2) disabling ipv6 in that line
> 3) adding root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde to the last line
> AFTER /initramfs ….
>
> Nothing so far has made any difference. Obviously the process works, as
> it works for me just fine on the Dell server.
>
> Underlying this machine is a SATA RAID 1 PCI card with two SSD drives
> attached in a RAID 1 mirror. Not that that should matter, but I’m
> including it for reference. As noted previously, it boots into the stock
> kernel just fine.
>
> Any help would be appreciated.
>
Thanks for the testing and the report.
Have you tried booting the Xen4CentOS kernel (Linux-3.18.21-16) by itself
(i.e., not under Xen)?
Also, is there any chance you could get the output of a serial console?
That's pretty critical for debugging this sort of thing.
-George
___
CentOS-virt mailing list
CentOS-virt@centos.org
https://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] new install of Xen 4.6 hangs on Loading initial ramdisk
On Tue, Dec 8, 2015 at 4:17 PM, President wrote:
> Not sure if this actually made it to the list the first time.
>
>
> Here is the SERIAL output (bottom of message after your questions).
> Googling the error indicates it's something people ran into a few years back
> but was supposedly fixed. Any ideas?
>
>
> I can verify that if I REMOVE the second CPU, it boots into Xen kernel no
> problem. The CPU itself doesn't matter, as I can swap either CPU into the
> first slot, and it boots. Only if there is a second CPU does it fail.
Great, thanks for the report. This looks like a bug in upstream Xen
-- would you mind re-posting this (with the serial output) on the
xen-users mailing list? That will get more eyeballs on the problem.
-George
>
>
> -Original message-
> From: George Dunlap
> Sent: Monday 30th November 2015 6:00
> To: Discussion about the virtualization on CentOS
> Subject: Re: [CentOS-virt] new install of Xen 4.6 hangs on Loading initial
> ramdisk
>
>
>
> On Fri, Nov 27, 2015 at 11:18 PM, Craig Thompson
> wrote:
>>
>> First post to this list. I would appreciate some help on this issue.
>>
>> As background, I installed CentOS 7 on a Dell server, and then ran the
>> following commands:
>>
>> yum update
>> http://buildlogs.centos.org/centos/7/virt/x86_64/xen/centos-release-xen-7-11.el7.x86_64.rpm
>> yum --enablerepo=centos-virt-xen-testing update
>> yum --enablerepo=centos-virt-xen-testing install xen
>>
>> Doing that, I was able to successfully install Xen, create a virtual
>> machine with its own HVM setup, logical volume, etc. and boot it just fine.
>>
>> I then tried to do the same on an IBM x3550 server I’m trying to install
>> with CentOS 7. The CentOS 7 install went just fine. I can boot into the
>> standard kernel and have a working machine. But after running the commands
>> above to install the Xen hypervisor, the machine hangs on boot for a few
>> moments after displaying the lines below and then reboots in a loop over and
>> over and over:
>>
>> Loading Xen 4.6.0-2.el7 …
>> Loading Linux 3.18.21-16.el7.x86_64 …
>> Loading initial ramdisk …
>>
>> It never gets beyond that. If I choose the stock kernel (no Xen) from the
>> Grub menu, it will continue to boot into that just fine.
>>
>> My grub.cfg file has these entries of note:
>>
>> multiboot /xen-4.6.0-2.el7.gz placeholder dom0_mem=1024M,max:1024M
>> cpuinfo com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all
>> ${xen_rm_opts}
>> echo'Loading Linux 3.18.21-16.el7.x86_64 ...'
>> module /vmlinuz-3.18.21-16.el7.x86_64 placeholder
>> root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde ro crashkernel=auto debug
>> irqpoll ipv6.disable=1 console=hvc0 earlyprintk=xen nomodeset
>> echo'Loading initial ramdisk ...'
>> module --nounzip /initramfs-3.18.21-16.el7.x86_64.img
>>
>>
>> What I have tried:
>>
>> 1) adding debug into the vmlinuz line
>> 2) disabling ipv6 in that line
>> 3) adding root=UUID=9dc18146-f9b3-41cc-ba9c-7314689abcde to the last line
>> AFTER /initramfs ….
>>
>> Nothing so far has made any difference. Obviously the process works, as
>> it works for me just fine on the Dell server.
>>
>> Underlying this machine is a SATA RAID 1 PCI card with two SSD drives
>> attached in a RAID 1 mirror. Not that that should matter, but I’m including
>> it for reference. As noted previously, it boots into the stock kernel just
>> fine.
>>
>> Any help would be appreciated.
>
>
> Thanks for the testing and the report.
>
> Have you tried booting the Xen4CentOS kernel (Linux-3.18.21-16) by itself
> (i.e., not under Xen)?
>
> Also, is there any chance you could get the output of a serial console?
> That's pretty critical for debugging this sort of thing.
> CentOS-virt mailing list
>
>
>
> ### No such file or directory opening port
> (XEN) Bad console= option 'tty'
> Xen 4.6.0-2.el7
> (XEN) Xen version 4.6.0-2.el7 (mockbu...@centos.org) (gcc (GCC) 4.8.3
> 20140911 (Red Hat 4.8.3-9)) debug=n Tue Nov 3 17:23:39 UTC 2015
> (XEN) Latest ChangeSet: Mon Oct 19 12:05:21 2015 +0100 git:36b6fe9-dirty
> (XEN) Bootloader: GRUB 2.02~beta2
> (XEN) Command line: placeholder dom0_mem=1024M,max:1024M cpuinfo
> com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all
> (XEN) Video information:
> (XEN) VGA is text mode 80x25, font 8x16
> (XEN) VBE/DDC methods: V2; EDID transfer time: 2 seconds
> (XEN) Disc information:
> (XEN) Found 1 MBR signature
