Article ID: 8562, created on May 28, 2010, last review on May 2, 2014

  • Applies to:
  • Virtuozzo containers for Linux 4.0

Release notes

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Synopsis:          New Parallels Virtuozzo Containers 4.0 kernel provides a
                            critical performance fix for the IO scheduler.
Issue date:        2010-05-27
Product:             Parallels Virtuozzo Containers 4.0
Keywords:         'IO scheduler' 'performance'

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This document provides information on the new Virtuozzo Containers 4.0 kernel,
version 2.6.18-028stab069.6

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TABLE OF CONTENTS

1. About This Release
2. Bugs Fixed
3. Obtaining New Kernel
4. Installing New Kernel
5. Required RPMs
6. Reference List

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1. ABOUT THIS RELEASE

The current update for the Virtuozzo Containers 4.0 kernel provides a new kernel
that includes a fix for the IO performance degradation introduced in the
previous release.

We highly recommend that all Parallels Virtuozzo Containers 4.0 users update
their kernel to the latest version.

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2. BUGS FIXED

The following bug from the previous release has been fixed in the new
Virtuozzo Containers 4.0 kernel:

- #1530: Disk IO regression is present in kernel 2.6.18-194.3.1.el5.028stab069.5

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3. OBTAINING NEW KERNEL

You can download and install this kernel update using the vzup2date utility
included in the Parallels Virtuozzo Containers 4.0 distribution set.

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4. INSTALLING NEW KERNEL

To install the update, do the following:

I. Use the "rpm -ihv" command to install the new kernel and Virtuozzo modules.

# rpm -ivh vzkernel-2.6.18-028stab069.6.i686.rpm \
vzmodules-2.6.18-028stab069.6.i686.rpm
Preparing...                ################################# [100%]
    1:vzkernel               ################################# [50%]
    2:vzmodules              ################################# [100%]

    Please DO NOT USE the "rpm -Uhv" command to install the kernel. Otherwise,
    all the kernels previously installed on your system may be removed from
    the Hardware Node.

II. You can adjust your boot loader configuration file to have the new kernel
    loaded by default. If you use the LILO bootloader, please do not forget to
    execute the 'lilo' command to write the changes to the boot sector:

     # lilo
     Added Virtuozzo2 *
     Added Virtuozzo1
     Added linux
     Added linux-up

III. Reboot your computer with the "shutdown -r now" command to boot the new
     kernel.

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5. REQUIRED RPMS

Depending on the processor installed on the Hardware Node, the following RPM
packages are included in the kernel update:

x86 kernels:

- SMP:
   vzkernel-2.6.18-028stab069.6.i686.rpm
   vzmodules-2.6.18-028stab069.6.i686.rpm

- Enterprise:
   vzkernel-ent-2.6.18-028stab069.6.i686.rpm
   vzmodules-ent-2.6.18-028stab069.6.i686.rpm

- Enterprise with the 4GB split feature disabled:
   vzkernel-PAE-2.6.18-028stab069.6.i686.rpm
   vzmodules-PAE-2.6.18-028stab069.6.i686.rpm


x86_64 kernels:

- SMP:
   vzkernel-2.6.18-028stab069.6.x86_64.rpm
   vzmodules-2.6.18-028stab069.6.x86_64.rpm

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6. REFERENCE LIST

http://bugzilla.openvz.org/show_bug.cgi?id=1530

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Copyright © 1999-2010 Parallels Holdings, Ltd. and its affiliates. All rights
reserved.

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