Article ID: 119034, created on Dec 5, 2013, last review on May 8, 2014

  • Applies to:
  • Virtuozzo containers for Linux 4.7
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Synopsis:          A new Parallels Virtuozzo Containers 4.7 kernel update
                   addressing security, performance, and stability issues.
Product:           Parallels Virtuozzo Containers 4.7
Keywords:          'bugfix' 'stability'

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This document provides information on the new Parallels Virtuozzo Containers 4.7
kernel, version 2.6.32-042stab084.12.

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CONTENTS

1. About This Update
2. Update Description
3. Obtaining the New Kernel
4. References

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1. ABOUT THIS UPDATE

The current update for the Parallels Virtuozzo Containers 4.7 kernel provides a
new kernel based on the Red Hat Enterprise Linux 6.4 kernel
(2.6.32-358.23.2.el6). The updated kernel includes a number of performance and
stability fixes.

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2. UPDATE DESCRIPTION

This update includes the following fixes and improvements:

* iotop utility didn't work inside Containers (OpenVZ #2549)

* Added the ability to see in which Container the process was killed by OOM
  killer (PCLIN-32184)

* Fixed 'WARNING: at kernel/softirq.c:161 local_bh_enable_ip+0x7d/0xb0()'
  (PSBM-23346, OpenVZ #2526)

* A race in ploop_tracker_init() could lead to data corruption on Container's
  live migration (PSBM-22993)

* Kernel could crash on an attempt to access specific device (PSBM-21015)

* Multiple improvements and fixes regarding ploop images stability and
  performance. (PSBM-23452, PSBM-23302, PSBM-22506)

* Other stability fixes: PSBM-23231, PSBM-20168, PSBM-23133, PSBM-22982,
  PSBM-22887, PSBM-22826, PSBM-22229, PSBM-22198, PSBM-21877, PSBM-21076,
  PSBM-20614, PSBM-18642

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3. OBTAINING THE NEW KERNEL

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

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Copyright (c) 1999-2013 Parallels IP Holdings GmbH and its affiliates. All
rights reserved.

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