Xen DomU booting process [PV on HVM].


Centos:
-------------

-Kernel loaded with parameter ide0=noprobe[it will prevent disk & NIC emulation, use xen pv drivers].

Linux version 2.6.32-431.el6.x86_64 (mockbuild@c6b8.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-4) (GCC) ) #1 SMP Fri Nov 22 03:15:09 UTC 2013
Command line: ro root=UUID=07a30ea1-f06a-44e5-a85a-6e346bb9e3af rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quieti console=ttyS0 ide0=noprobe

E.g.

Netfront and the Xen platform PCI driver have been compiled for this kernel: unplug emulated NICs.
Blkfront and the Xen platform PCI driver have been compiled for this kernel: unplug emulated disks.

Booting paravirtualized kernel on Xen
NR_CPUS:4096 nr_cpumask_bits:15 nr_cpu_ids:15 nr_node_ids:1

 Xen HVM callback vector for event delivery is enabled

Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)

pci_hotplug: PCI Hot Plug PCI Core version: 0.5
pciehp: PCI Express Hot Plug Controller Driver version: 0.4
acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5


input: Macintosh mouse button emulation as /devices/virtual/input/input2
xvda: xvda1 xvda2 xvda3

 xvda: xvda1 xvda2 xvda3

EXT4-fs (xvda2): INFO: recovery required on readonly filesystem
EXT4-fs (xvda2): write access will be enabled during recovery
EXT4-fs (xvda2): recovery complete
EXT4-fs (xvda2): mounted filesystem with ordered data mode. Opts:
dracut: Mounted root filesystem /dev/xvda2


Welcome to CentOS[screen]

Starting udev: udev: starting version 147

Initialising Xen virtual ethernet driver.

All services are  started.

That's all.










Comments

Post a Comment

Popular posts from this blog

KVM & Qemu

QEMU is a powerful emulator, which means that it can emulate a variety of processor types. Xen uses QEMU for HVM guests, more specifically for the HVM guest's device model. The Xen-specific QEMU is called qemu-dm (short for QEMU device model) QEMU uses emulation; KVM uses processor extensions (intel-VT) for virtualization. Both Xen and KVM merge their various functionality to upstream QEMU, that way upstream QEMU can be used directly to accomplish Xen device model emulation, etc. Xen is unique in that it has paravirtualized guests that don't require hardware virtualization. Both Xen and KVM have paravirtualized device drivers that can run on top of the HVM guests. The QEMU hypervisor is very similar to the KVM hypervisor. Both are controlled through libvirt, both support the same feature set, and all virtual machine images that are compatible with KVM are also compatible with QEMU. The main difference is that QEMU does not support native virtualization. Consequently, QEMU has
Read more

PHP Fatal error: Class 'JFactory' not found

I have faced this issue in Joomla site and searched the forums but none of the forums including joomla did not give solution for me. They simply suggest to check joomla version, php version compatibility and php extensions. Finally I have fixed the issue. Issue:- ---------  [26-Sep-2014 18:11:29 Europe/Berlin] PHP Fatal error: Class 'JFactory' not found in /home/test/public_html/index.php on line 31 Cause & Solution:- ----------------------- In my case, it seems file which gives the class JFactory was missed. /home/test/public_html/libraries/joomla/factory.php --->Core file for Joomla. Simply restore that file under proper path to fix the issue.
Read more

docker.errors.APIError: 400 Client Error client is newer than server

You can face this issue when you are trying to use docker python library. Error: docker.errors.APIError: 400 Client Error: Bad Request for url: http+docker://localunixsocket/v1.26/images/json?only_ids=0&all=0 ("client is newer than server (client API version: 1.26, server API version: 1.24)") Solution: client= docker.from_env(version='auto') Use parameter "version" when instantiating a client.
Read more