Red Hat APPLICATION STACK 1.1 RELEASE Manuale Utente Scaricare il pdf (Pagina 17)

Feature Overview

Patches, Conﬁguration Options, Commands, and Libraries

The following list describes patches implemented and enhancements to conﬁguration

options, commands, and libraries:

•Newlibrl library. This new library supplies command line editing and command

history functionality. See the cmd/lcrash/lib/librl/README ﬁle for information on

how to use this library. The lcrash command uses this library.

• Remote debugging over a serial line. There is a new conﬁguration option,

CONFIG_GDB, which is used to enable gdb debugging. To force a kernel that has

been compiled withCONFIG_GDB to pauseduring theboot process and waitfor a

connection from gdb, the parameter gdb should be passed to the kernel. This can be

done by typing gdb after the name of the kernel on the LILO command line. The

patch defaults touse ttyS1 at abaud rate of38400. Theseparameters can bechanged

by using gdbttyS=port number and gdbbaud=baud rate on the command line.

• rlimits patch. In the Linux 2.2.10 kernel, faulty rlimit checking will not allow a

process to have more than 2 GB total address space, stack size or locked memory.

This release has ﬁxed the rlimit checking, so (subject to other accounting

limitations), the kernel honors RLIM_INFINITY settings on these resources.

• SMP PTE patch. In stock Linux, the page stealing code that is used under high

memory load has a bug that might cause it to steal a page from a process without

writing out the contents to swap if the page has been modiﬁed by the process. This

bug is only present in a multiprocessor machine. The 1.1 release provides a ﬁx for

this bug.

Qualiﬁed Drivers

QLogic 1080/1280 and 2100 drivers have been supplied by QLogic Corporation, and

includeupdatedﬁrmwareandbettererrorhandling. TheAlteonGigabit Ethernet driver

has been modiﬁed to recognize and drive the SGI Gigabit Ethernet card.

The following drivers are qualiﬁed for the Silicon Graphics 1400L Server:

• NCR 53c8xx SCSI

• Intel Ethernet Express Pro 10/100 mb Ethernet

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Red Hat APPLICATION STACK 1.1 RELEASE Manuale Utente Pagina 17