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If you have a system with only one CPU, say N. If you have a system with more than one CPU, say Y. If you say N here, the kernel will run on single and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on single-processor machines. On a single-processor machine, the kernel will run faster if you say N here. If you don't know what to do here, say Y. config IRQ_ALL_CPUS bool "Distribute interrupts on all CPUs by default" depends on SMP && PPC_PSERIES help This option gives the kernel permission to distribute IRQs across multiple CPUs. Saying N here will route all IRQs to the first CPU. config NR_CPUS int "Maximum number of CPUs (2-64)" depends on SMP default "32" config HMT bool "Hardware multithreading" depends on SMP && PPC_PSERIES config DISCONTIGMEM bool "Discontiguous Memory Support" depends on SMP && PPC_PSERIES config NUMA bool "NUMA support" depends on DISCONTIGMEM config PREEMPT bool help This option reduces the latency of the kernel when reacting to real-time or interactive events by allowing a low priority process to be preempted even if it is in kernel mode executing a system call. Unfortunately the kernel code has some race conditions if both CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is currently disabled if you are building an SMP kernel. Say Y here if you are building a kernel for a desktop, embedded or real-time system. Say N if you are unsure. config MSCHUNKS bool depends on PPC_ISERIES default y config RTAS_FLASH tristate "Firmware flash interface" depends on !PPC_ISERIES config SCANLOG tristate "Scanlog dump interface" depends on !PPC_ISERIES config PPC_RTAS bool "Proc interface to RTAS" depends on !PPC_ISERIES endmenu menu "General setup" config ISA bool help Find out whether you have ISA slots on your motherboard. ISA is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. If you have an Apple machine, say N here; if you have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If you have an embedded board, consult your board documentation. config SBUS bool config MCA bool config EISA bool config PCI bool default y help Find out whether your system includes a PCI bus. PCI is the name of a bus system, i.e. the way the CPU talks to the other stuff inside your box. If you say Y here, the kernel will include drivers and infrastructure code to support PCI bus devices. # only elf supported, a.out is not -- Cort config KCORE_ELF bool depends on PROC_FS default y help If you enabled support for /proc file system then the file /proc/kcore will contain the kernel core image in ELF format. This can be used in gdb: $ cd /usr/src/linux ; gdb vmlinux /proc/kcore This is especially useful if you have compiled the kernel with the "-g" option to preserve debugging information. It is mainly used for examining kernel data structures on the live kernel. config BINFMT_ELF bool "Kernel support for 64-bit ELF binaries" help ELF (Executable and Linkable Format) is a format for libraries and executables used across different architectures and operating systems. config BINFMT_MISC tristate "Kernel support for MISC binaries" ---help--- If you say Y here, it will be possible to plug wrapper-driven binary formats into the kernel. You will like this especially when you use programs that need an interpreter to run like Java, Python or Emacs-Lisp. It's also useful if you often run DOS executables under the Linux DOS emulator DOSEMU (read the DOSEMU-HOWTO, available from <http://www.linuxdoc.org/docs.html#howto>). Once you have registered such a binary class with the kernel, you can start one of those programs simply by typing in its name at a shell prompt; Linux will automatically feed it to the correct interpreter. You can do other nice things, too. Read the file <file:Documentation/binfmt_misc.txt> to learn how to use this feature, and <file:Documentation/java.txt> for information about how to include Java support. You must say Y to "/proc file system support" (CONFIG_PROC_FS) to use this part of the kernel. You may say M here for module support and later load the module when you have use for it; the module is called binfmt_misc. If you don't know what to answer at this point, say Y. source "drivers/pci/Kconfig" config HOTPLUG bool "Support for hot-pluggable devices" ---help--- Say Y here if you want to plug devices into your computer while the system is running, and be able to use them quickly. In many cases, the devices can likewise be unplugged at any time too. One well known example of this is PCMCIA- or PC-cards, credit-card size devices such as network cards, modems or hard drives which are plugged into slots found on all modern laptop computers. Another example, used on modern desktops as well as laptops, is USB. Enable HOTPLUG and KMOD, and build a modular kernel. Get agent software (at <http://linux-hotplug.sourceforge.net/>) and install it. Then your kernel will automatically call out to a user mode "policy agent" (/sbin/hotplug) to load modules and set up software needed to use devices as you hotplug them. source "drivers/pcmcia/Kconfig" source "drivers/hotplug/Kconfig" config PROC_DEVICETREE bool "Support for Open Firmware device tree in /proc" depends on !PPC_ISERIES help This option adds a device-tree directory under /proc which contains an image of the device tree that the kernel copies from Open Firmware. If unsure, say Y here. config CMDLINE_BOOL bool "Default bootloader kernel arguments" depends on !PPC_ISERIES config CMDLINE string "Initial kernel command string" depends on CMDLINE_BOOL default "console=ttyS0,9600 console=tty0 root=/dev/sda2" help On some platforms, there is currently no way for the boot loader to pass arguments to the kernel. For these platforms, you can supply some command-line options at build time by entering them here. In most cases you will need to specify the root device here. endmenu source "drivers/mtd/Kconfig" source "drivers/parport/Kconfig" source "drivers/pnp/Kconfig" source "drivers/block/Kconfig" menu "ATA/ATAPI/MFM/RLL support" config IDE tristate "ATA/ATAPI/MFM/RLL support" ---help--- If you say Y here, your kernel will be able to manage low cost mass storage units such as ATA/(E)IDE and ATAPI units. The most common cases are IDE hard drives and ATAPI CD-ROM drives. If your system is pure SCSI and doesn't use these interfaces, you can say N here. Integrated Disk Electronics (IDE aka ATA-1) is a connecting standard for mass storage units such as hard disks. It was designed by Western Digital and Compaq Computer in 1984. Quite a number of disks use the IDE interface. Fast-IDE is ATA-2 (also named Fast ATA), Enhanced IDE (EIDE) is ATA-3. It provides support for larger disks (up to 8.4GB by means of the LBA standard), more disks (4 instead of 2) and for other mass storage units such as tapes and cdrom. UDMA/33 (aka UltraDMA/33) is ATA-4 and provides faster (and more CPU friendly) transfer modes than previous PIO (Programmed processor Input/Output) from previous ATA/IDE standards by means of fast DMA controllers. ATA Packet Interface (ATAPI) is a protocol used by EIDE tape and CD-ROM drives, similar in many respects to the SCSI protocol. SMART IDE (Self Monitoring, Analysis and Reporting Technology) was designed in order to prevent data corruption and disk crash by detecting pre hardware failure conditions (heat, access time, and the like...). Disks built since June 1995 may follow this standard. The kernel itself don't manage this; however there are quite a number of user programs such as smart that can query the status of SMART parameters disk. If you want to compile this driver as a module ( = code which can be inserted in and removed from the running kernel whenever you want), say M here and read <file:Documentation/modules.txt>. The module will be called ide. For further information, please read <file:Documentation/ide.txt>. If unsure, say Y. source "drivers/ide/Kconfig" endmenu menu "SCSI device support" config SCSI tristate "SCSI device support" ---help--- If you want to use a SCSI hard disk, SCSI tape drive, SCSI CD-ROM or any other SCSI device under Linux, say Y and make sure that you know the name of your SCSI host adapter (the card inside your computer that "speaks" the SCSI protocol, also called SCSI controller), because you will be asked for it. You also need to say Y here if you want support for the parallel port version of the 100 MB IOMEGA ZIP drive. This driver is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module will be called scsi_mod. If you want to compile it as a module, say M here and read <file:Documentation/modules.txt> and <file:Documentation/scsi/scsi.txt>. However, do not compile this as a module if your root file system (the one containing the directory /) is located on a SCSI device. source "drivers/scsi/Kconfig" endmenu source "drivers/md/Kconfig" source "drivers/message/fusion/Kconfig" source "drivers/ieee1394/Kconfig" source "drivers/message/i2o/Kconfig" source "net/Kconfig" source "net/ax25/Kconfig" source "net/irda/Kconfig" source "drivers/isdn/Kconfig" source "drivers/telephony/Kconfig" # # input before char - char/joystick depends on it. As does USB. # source "drivers/input/Kconfig" source "drivers/char/Kconfig" source "drivers/media/Kconfig" source "fs/Kconfig" source "drivers/video/Kconfig" menu "Sound" config SOUND tristate "Sound card support" ---help--- If you have a sound card in your computer, i.e. if it can say more than an occasional beep, say Y. Be sure to have all the information about your sound card and its configuration down (I/O port, interrupt and DMA channel), because you will be asked for it. You want to read the Sound-HOWTO, available from <http://www.linuxdoc.org/docs.html#howto>. General information about the modular sound system is contained in the files <file:Documentation/sound/Introduction>. The file <file:Documentation/sound/README.OSS> contains some slightly outdated but still useful information as well. If you have a PnP sound card and you want to configure it at boot time using the ISA PnP tools (read <http://www.roestock.demon.co.uk/isapnptools/>), then you need to compile the sound card support as a module ( = code which can be inserted in and removed from the running kernel whenever you want) and load that module after the PnP configuration is finished. To do this, say M here and read <file:Documentation/modules.txt> as well as <file:Documentation/sound/README.modules>; the module will be called soundcore. I'm told that even without a sound card, you can make your computer say more than an occasional beep, by programming the PC speaker. Kernel patches and supporting utilities to do that are in the pcsp package, available at <ftp://ftp.infradead.org/pub/pcsp/>. source "sound/Kconfig" endmenu source "drivers/usb/Kconfig" source "net/bluetooth/Kconfig" menu "iSeries device drivers" depends on PPC_ISERIES config VIOCONS tristate "iSeries Virtual Console Support" config VIODASD tristate "iSeries Virtual I/O disk support" help If you are running on an iSeries system and you want to use virtual disks created and managed by OS/400, say Y. config VIODASD_IDE bool "iSeries Virtual disk IDE emulation" depends on VIODASD help This causes the iSeries virtual disks to look like IDE disks. If you have programs or utilities that only support certain kinds of disks, this option will cause iSeries virtual disks to pretend to be IDE disks, which may satisfy the program. config VIOCD tristate "iSeries Virtual I/O CD support" help If you are running Linux on an IBM iSeries system and you want to read a CD drive owned by OS/400, say Y here. config VIOCD_AZTECH bool "iSeries Virtual CD Aztech emulation" depends on VIOCD config VIOTAPE tristate "iSeries Virtual Tape Support" help If you are running Linux on an iSeries system and you want Linux to read and/or write a tape drive owned by OS/400, say Y here. config VETH tristate "iSeries Virtual Ethernet driver support" endmenu config VIOPATH bool depends on PPC_ISERIES default y source "arch/ppc64/oprofile/Kconfig" menu "Kernel hacking" config DEBUG_KERNEL bool "Kernel debugging" help Say Y here if you are developing drivers or trying to debug and identify kernel problems. config DEBUG_SLAB bool "Debug memory allocations" depends on DEBUG_KERNEL help Say Y here to have the kernel do limited verification on memory allocation as well as poisoning memory on free to catch use of freed memory. config MAGIC_SYSRQ bool "Magic SysRq key" depends on DEBUG_KERNEL help If you say Y here, you will have some control over the system even if the system crashes for example during kernel debugging (e.g., you will be able to flush the buffer cache to disk, reboot the system immediately or dump some status information). This is accomplished by pressing various keys while holding SysRq (Alt+PrintScreen). It also works on a serial console (on PC hardware at least), if you send a BREAK and then within 5 seconds a command keypress. The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y unless you really know what this hack does. config XMON bool "Include xmon kernel debugger" depends on DEBUG_KERNEL help Include in-kernel hooks for the xmon kernel monitor/debugger. Unless you are intending to debug the kernel, say N here. config XMON_DEFAULT bool "Enable xmon by default" depends on XMON config PPCDBG bool "Include PPCDBG realtime debugging" depends on DEBUG_KERNEL endmenu source "security/Kconfig" source "crypto/Kconfig" source "lib/Kconfig" |