Xen; Rhba-2009:1092: Bug Fix Update; Rhba-2009:0401: Bug Fix Update - Red Hat ENTERPRISE LINUX 5.4 - TECHNICAL NOTES Manual

1.242. xen

1.242.1. RHBA-2009:1092: bug fix update

Note
This update has already been released (prior to the GA of this release) as errata
RHBA-2009:1092
Updated xen packages that resolve an issue are now available.
Xen is a high performance and secure open source virtualization framework. Virtualization allows
users to run guest operating systems in virtual machines on top of a host operating system.
These updated xen packages fix the following bug:
• the Linux bonding driver aggregates multiple network interfaces into a single, local "bonded"
interface. The 802.1Q specification (also known as VLAN tagging) allows multiple bridged networks
to transparently share a single physical network link. When attempting to use a bonded interface
and 802.1Q VLAN tagging together, the "network-bridge-bonding" networking script incorrectly
called the ifdown command on interfaces other than "bond0", with the result that only the bond0
bridge became active (and not, for example, the "bond0.5" bridge). With these updated packages,
using interface bonding together with 802.1Q VLAN tagging works as expected and all interfaces
that are expected to become active do so, thus resolving the issue.
All users of the xen packages are advised to upgrade to these updated packages, which resolve this
issue.

1.242.2. RHBA-2009:0401: bug fix update

Note
This update has already been released (prior to the GA of this release) as errata
RHBA-2009:0401
Updated Xen packages that fix various bugs are now available.
Xen is a high performance and secure open source virtualization framework. Virtualization allows
users to run guest operating systems in virtual machines on top of a host operating system.
Bugs fixed in these updated packages include:
• Data corruption occurred on guests with virtual SCSI disks larger than 1TB. This update adds
support for virtual disks larger than 1TB.
• Various SCSI device data corruption issues occurred on fully virtualized guests with over 4GB of
RAM. This update resolves the data corruption issues on fully virtualized guests with over 4GB of
RAM.
• The Xen SCSI driver scsi_write_data() system call did not verify data if was written before returning.
The SCSI driver now flushes the buffer before it returns which ensures data is written to the disk.
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