Red Hat ENTERPRISE 5.3 RELEASE NOTES Guía de instalación descargar pdf (Pagina 25)

including:

Improved Enhanced Error Handling (EEH) for PCI adapters on PowerPC architectures

Increased the number of supported NPIV virtual ports

Improved driver logic to control I/O queue depth

Added support for Fibre Channel over Ethernet (FCoE) adapters

Booting from SAN for new hardware is now supported

the cciss driver for HP Smart Array controllers has been updated to version 3.6.20-RH2.

5. Kernel-Related Notes

5.1. All Architectures

relayfs previously had a buffer size limit of 64MB. In this update, the limitation of the memory

allocated to relayfs for on-memory buffers has been increased to 4095MB. T his allows SystemTap

and other tracing tools that utilize relayfs the ability to trace more events.

The driver for Dell Rem ote Access Controller 4 (DRAC4) was not present. Consequently,

any virtual devices provided by the DRAC4 were not being detected by the kernel. In this update, the

pata_sil680 kernel module that provides the appropriate driver has been added, which resolves this

issue.

The message buffers for the relay interface were only allocated for online CPUs when

relay_open() was called. Consequently, if an off-line CPU was turned on after relay_open()

was called, a kernel panic would occur. In this update, a new message buffer is allocated dynamically

if any new CPUs are added.

The driver for 8250 based serial ports has been updated to add support for DSR/DTR hardware flow

control.

Support for Dell Wireless Wide Area Network (WWAN) cards has been added to the kernel. Devices

that are now supported are:

Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card

Dell Wireless 5500 Mobile Broadband HSDPA Mini-Card

Dell Wireless 5505 Mobile Broadband HSDPA Mini-Card

Dell Wireless 5700 Mobile Broadband CDMA/EVDO ExpressCard

Dell Wireless 5510 Mobile Broadband HSDPA ExpressCard

Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card

Dell Wireless 5720

Dell Wireless HSDPA 5520

Dell Wireless 5520 Voda I Mobile Broadband (3G HSDPA) Mini-Card

the thinkpad_acpi kernel module has been updated to provide enhanced support for newer

Thinkpad models.

The soft lockup detector can now be configured to trigger a kernel panic instead of a warning

message. This makes it possible for users to generate and analyze a crash dump during a soft

lockup for forensic purposes.

To configure the soft lockup detector to generate a panic, set the kernel parameter soft_lockup to

1. This parameter is set to 0 by default.

oprofile did not correctly identify processors based on the Next-Generation Intel

Red Hat Enterprise Linux 5 5.3 Release Notes

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Red Hat ENTERPRISE 5.3 RELEASE NOTES Guía de instalación Pagina 25