Red Hat ENTERPRISE LINUX 5.3 - RELEASE MANIFEST, Руководство по выпуску, Страница: 27 / 240

ia64 Architecture
27
To resolve this issue, parameters should be enclosed with single quotes inside of double quotes (ie
parameters="vmhalt='LOGOFF'"
)
Note
The syntax structure of single quotes inside of double quotes is the default in Red hat
Enterprise Linux 5.
5.6. ia64 Architecture
• The Dual-Core Intel Itanium 2 processor filled out machine check architecture (MCA) records
differently to previous Intel Itanium processors. The cache check and bus check target identifiers
can now be different in some circumstances. The kernel has been updated to find the correct target
identifier.
•
kprobe-booster
is now supported on the ia64 and x86_64 architectures, allowing users to probe
kernel events much faster. This feature will also decrease the overhead caused by probing tools
(e.g. SystemTap and Kprobes) on servers running on 64-bit architecture.
• In this update, support for
pselect()
and
ppoll()
system calls has been added to the kernel.
6. Virtualization
This section contains information about updates made to Red Hat Enterprise Linux suite of
Virtualization tools.
6.1. Feature Updates
• The blktap (blocktap) userspace toolkit has been updated, providing the functionality to monitor the
transfer statistics of blktap backed virtualized guests.
• Support was added for the Intel Extended Page Table (EPT) feature, improving performance of fully
virtualized guests on hardware that supports EPT.
•
e1000
network device emulation for guests has been added in this update, supporting only
Windows 2003 guests on the ia64 architecture. To use e1000 emulation, the xm command must be
used.
• Drivers for
virtio
, the platform for I/O virtualization in KVM, has been backported to Red Hat
Enterprise Linux 5.3 from Linux Kernel 2.6.27. These drivers will enable KVM guests to achieve
higher levels of I/O performance. Various userspace components such as:
anaconda
,
kudzu
,
lvm
,
selinux
and
mkinitrd
have also been updated to support virtio devices.
• The native Linux kernel supports
vmcoreinfo
automatically, but, to setup kdump on dom0
domains, the
kernel-xen-debuginfo
package was needed. With this release, the kernel and
the hypervisor have been modified and now support vmcoreinfo reading and writing kdump natively.
Users needing to use kdump for de-bugging or other investigations on dom0 domains can now do
so without installing the
debuginfo
or
debuginfo-common
packages.