Article ID: 115301, created on Dec 14, 2012, last review on Dec 27, 2012

  • Applies to:
  • Virtuozzo containers for Linux 4.7
-----------------------------------------------------------------------
Synopsis:          New Parallels Virtuozzo Containers 4.7 kernel provides an update with performance and stability fixes.
Product:           Parallels Virtuozzo Containers 4.7
Keywords:          "bugfix" "stability" "performance"

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

This document provides information on the new Virtuozzo Containers 4.7 kernel, version 2.6.32-042stab068.8.

--------------------------------------------------------------------------------
TABLE OF CONTENTS

1. About This Release
2. Updates Description
3. Obtaining New Kernel

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

1. ABOUT THIS RELEASE

The current update for the Virtuozzo Containers 4.7 kernel provides a new
kernel based on the Red Hat Enterprise Linux 6.3 kernel (2.6.32-279.14.1.el6).
The updated kernel includes a number of performance and stability fixes.

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

2. UPDATES DESCRIPTION

This update contains the following fixes:

* A lot of improvements in how the kernel manages per-Container caches have been
  introduced. This results in a stronger isolation between Containers
  and in a better performance on typical workloads. (PSBM-15796)

  In particular, IO-active workloads on a Node (e.g., vzbackup, vzcache,
  vzmigrate, etc.) no longer heavily affect the Containers running on this
  Node.

* The virtual Swap functionality no longer requires a real swap on the Node. (PSBM-16764)

* Restoring a Container no longer causes a kernel panic if a dead task gets
  into the checkpointing dump for some reason. (PSBM-17107)

* A long-standing bug in the "pty" layer that could be triggered by
  a too-low "dcache" limit value has been fixed. (OVZ 1758)

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

3. OBTAINING NEW KERNEL

You can download and install this kernel update using the vzup2date utility
included in the Parallels Virtuozzo Containers 4.7 distribution set.

--------------------------------------------------------------------------------
Copyright (c) 1999-2012 Parallels Holdings, Ltd. and its affiliates. All rights
reserved.

0c05f0c76fec3dd785e9feafce1099a9 2897d76d56d2010f4e3a28f864d69223 d02f9caf3e11b191a38179103495106f e8e50b42231236b82df27684e7ec0beb

Email subscription for changes to this article
Save as PDF