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Information Update 15
Linux Operating System Information
Booting Red Hat Enterprise Linux AS (Version 4) for Intel x86 With More than Eight Logical
Processors
A system running the Red Hat Enterprise Linux AS (version 4) for Intel x86 operating system will fail
to boot if it is configured with more than eight logical processors. To work around this issue, pass the
parameter apic=bigsmp to the kernel command line at system boot. A correction for this issue will
be available in a future Red Hat Enterprise Linux Version 4 Update.
Using More than Eight Logical Processors With Red Hat Enterprise Linux (Version 4)
for Intel EM64T
A limitation in the Red Hat Enterprise Linux (version 4) for Intel EM64T operating system will cause the
operating system to use no more than eight logical processors even if more processors are present in your
system. On systems with more than eight logical processors, the Linux operating system will recognize and
report only eight processors. For more information about this limitation, see the
Red Hat Enterprise Linux 4
Update 3 Release Notes
on the Red Hat web site at
http://www.redhat.com/docs/manuals/enterprise/
.
Rebooting Red Hat Enterprise Linux AS (Version 4) for Intel EM64T
The system may hang when the message Restarting System appears while rebooting a system
running the Red Hat Enterprise Linux AS (version 4) for Intel EM64T operating system. If this occurs,
use the power button to power off the system. A correction for this issue will be available in a future
Red Hat Enterprise Linux Version 4 Update.
NIC Device Names
In a system using the Linux operating system without an optional PCI-X NIC card installed, the integrated
NICs are assigned device names
eth0
and
eth1
. However, if you install a PCI-X NIC card, the card’s NIC port
is assigned device name
eth0
(a dual-port card will be assigned device names
eth0
and
eth1)
and the
integrated NICs will be assigned subsequent numbers. The designations are assigned in the order of the PCI
bus scan.
Microsoft Windows Server 2003 Installation With More
than Eight Logical Processors
A system configured with more than eight logical processors may hang during installation of versions
of Microsoft Windows Server 2003 Standard or Enterprise Edition earlier than SP1. To avoid this issue,
temporarily disable Logical Processor in the System Setup program.
(See your
User’s Guide
for
information on the System Setup program.)