Red Hat Enterprise Linux minor releases are an aggregation of individual enhancement, security and bug fix errata. The Red Hat Enterprise Linux 5.10 Release Notes document the major changes made to the Red Hat Enterprise Linux 5 operating system and its accompanying applications for this minor release. Detailed notes on all changes in this minor release are available in the Technical Notes

The Release Notes provide high level coverage of the improvements and additions that have been implemented in Red Hat Enterprise Linux 5.10. For detailed documentation on all changes to Red Hat Enterprise Linux for the 5.10 update, refer to the Technical Notes

Chapter 1. Kernel

New panic_on_io_nmi Kernel Option

The Red Hat Enterprise Linux 5.10 kernel includes a new panic_on_io_nmi option (configured via the /proc/sys/kernel/panic_on_io_nmi file). This option allows users to press the hardware or virtual Non Maskable Interrupt (NMI) button, which acts as an I/O error and triggers a crash where otherwise no crash would occur. This can be used in cases when the system is unresponsive and does not accept any commands.

Added kABI Symbols

The following kABI symbols have been added to the kernel shipped with Red Hat Enterprise Linux 5.10:

unregister_lro_netdev

register_lro_netdev

libfc

libfcoe

These symbols allow Large Receive Offload to be disabled by the kernel stack.