Kernel Compile

Kernel compilation:
-------------------

cd /usr/src

wget ftp://ftp.kernel.org/pub/linux/kernel/v3.x/linux-3.13.6.tar.gz

tar xvf linux-3.13.6.tar.gz

cd linux-3.13.6

make menuconfig
--------------------------------
This for xen virtualiaztion support

Go into Processor type and features

Statically enable all XEN features

Go back to the  main menu and enter Device Drivers menu, then enter block devices menu

Statically enable the 2 XEN options

Go back to the Device Drivers menu and go down to XEN driver suppport

Statically enable all features

Go back to Device Drivers, go into Network device support and statically enable the 2 XEN options at the bottom

Exit out and save.
-----------------------------------

But you run directly " make menuconfig " & save, it creates new .config file.
But if you copied the config-`uname -r` file to /usr/src/linux-3.13.6 and run " make menuconfig ".
Now it included the new entries[e.g xen support] in that old config file.

Note to make sure all options are selected, Run

cat /usr/src/linux-3.13.6/.config | grep XEN

You should see the same as

CONFIG_XEN=y
CONFIG_XEN_DOM0=y
CONFIG_XEN_PRIVILEGED_GUEST=y
CONFIG_XEN_PVHVM=y
CONFIG_XEN_MAX_DOMAIN_MEMORY=500
CONFIG_XEN_SAVE_RESTORE=y
CONFIG_XEN_DEBUG_FS=y
CONFIG_PCI_XEN=y
CONFIG_XEN_PCIDEV_FRONTEND=y
CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_XEN_BLKDEV_BACKEND=y
CONFIG_NETXEN_NIC=m
CONFIG_XEN_NETDEV_FRONTEND=y
CONFIG_XEN_NETDEV_BACKEND=y
CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y
CONFIG_HVC_XEN=y
CONFIG_HVC_XEN_FRONTEND=y
# CONFIG_XEN_WDT is not set
CONFIG_XEN_FBDEV_FRONTEND=y
CONFIG_XEN_BALLOON=y
CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XEN_DEV_EVTCHN=y
CONFIG_XEN_BACKEND=y
CONFIG_XENFS=y
CONFIG_XEN_COMPAT_XENFS=y
CONFIG_XEN_SYS_HYPERVISOR=y
CONFIG_XEN_XENBUS_FRONTEND=y
CONFIG_XEN_GNTDEV=y
CONFIG_XEN_GRANT_DEV_ALLOC=y
CONFIG_SWIOTLB_XEN=y
CONFIG_XEN_PCIDEV_BACKEND=y
CONFIG_XEN_PRIVCMD=y
CONFIG_XEN_ACPI_PROCESSOR=y

If it looks good then continue otherwise please correct before hand.


SECTION 2:
----------------------------------
make bzImage

make modules

make modules_install

cp -a arch/x86/boot/bzImage /boot/vmlinuz-3.13.6

cp -a System.map /boot/System.map-3.13.6

cp -a .config /boot/config-3.13.6

depmod –a

mkinitramfs -o /boot/initrd.img-3.13.6 3.13.6

Modify GRUB to boot in XEN mode

vi /boot/grub/grub.conf

scroll down to the current setting and add the following above your current boot config, you will need to edit the lines to match your root and paths to the files.

title Xen 4.4.0 / Debian GNU/Linux, kernel 3.13.6
root (hd0,0)
kernel /xen.gz
module /vmlinuz-3.13.6 root=root=UUID=03f9e700-ba18-41a1-bbe7-65a372716c73 ro console=tty0
module /initrd.img-3.4.5

---------------------------------------------------

We can also use the below commands instead of section2,

--------------------------------------------------
Compile the main kernel:
# make
Compile the kernel modules:
# make modules
Install the kernel modules:
# make modules_install
At this point, you should see a directory named /lib/modules/3.9.3/ in your system.
 
Install the new kernel on the system:
# make install
The make install command will create the following files in the /boot directory.
  • vmlinuz-3.9.3 – The actual kernel
  • System.map-3.9.3 – The symbols exported by the kernel
  • initrd.img-3.9.3 – initrd image is temporary root file system used during boot process
  • config-3.9.3 – The kernel configuration file
----------------------------------------------

save and reboot.



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