kconfig

linux 内核源代码

comment "Kernel preemption"

source "kernel/Kconfig.preempt"

source "mm/Kconfig"

config HOLES_IN_ZONE
	def_bool y

comment "I/O subsystem configuration"

config MACHCHK_WARNING
	bool "Process warning machine checks"
	help
	  Select this option if you want the machine check handler on IBM S/390 or
	  zSeries to process warning machine checks (e.g. on power failures).
	  If unsure, say "Y".

config QDIO
	tristate "QDIO support"
	---help---
	  This driver provides the Queued Direct I/O base support for
	  IBM mainframes.

	  For details please refer to the documentation provided by IBM at
	  <http://www10.software.ibm.com/developerworks/opensource/linux390>

	  To compile this driver as a module, choose M here: the
	  module will be called qdio.

	  If unsure, say Y.

config QDIO_DEBUG
	bool "Extended debugging information"
	depends on QDIO
	help
	  Say Y here to get extended debugging output in
	    /sys/kernel/debug/s390dbf/qdio...
	  Warning: this option reduces the performance of the QDIO module.

	  If unsure, say N.

comment "Misc"

config IPL
	bool "Builtin IPL record support"
	help
	  If you want to use the produced kernel to IPL directly from a
	  device, you have to merge a bootsector specific to the device
	  into the first bytes of the kernel. You will have to select the
	  IPL device.

choice
	prompt "IPL method generated into head.S"
	depends on IPL
	default IPL_TAPE
	help
	  Select "tape" if you want to IPL the image from a Tape.

	  Select "vm_reader" if you are running under VM/ESA and want
	  to IPL the image from the emulated card reader.

config IPL_TAPE
	bool "tape"

config IPL_VM
	bool "vm_reader"

endchoice

source "fs/Kconfig.binfmt"

config PROCESS_DEBUG
	bool "Show crashed user process info"
	help
	  Say Y to print all process fault locations to the console.  This is
	  a debugging option; you probably do not want to set it unless you
	  are an S390 port maintainer.

config PFAULT
	bool "Pseudo page fault support"
	help
	  Select this option, if you want to use PFAULT pseudo page fault
	  handling under VM. If running native or in LPAR, this option
	  has no effect. If your VM does not support PFAULT, PAGEEX
	  pseudo page fault handling will be used.
	  Note that VM 4.2 supports PFAULT but has a bug in its
	  implementation that causes some problems.
	  Everybody who wants to run Linux under VM != VM4.2 should select
	  this option.

config SHARED_KERNEL
	bool "VM shared kernel support"
	help
	  Select this option, if you want to share the text segment of the
	  Linux kernel between different VM guests. This reduces memory
	  usage with lots of guests but greatly increases kernel size.
	  Also if a kernel was IPL'ed from a shared segment the kexec system
	  call will not work.
	  You should only select this option if you know what you are
	  doing and want to exploit this feature.

config CMM
	tristate "Cooperative memory management"
	help
	  Select this option, if you want to enable the kernel interface
	  to reduce the memory size of the system. This is accomplished
	  by allocating pages of memory and put them "on hold". This only
	  makes sense for a system running under VM where the unused pages
	  will be reused by VM for other guest systems. The interface
	  allows an external monitor to balance memory of many systems.
	  Everybody who wants to run Linux under VM should select this
	  option.

config CMM_PROC
	bool "/proc interface to cooperative memory management"
	depends on CMM
	help
	  Select this option to enable the /proc interface to the
	  cooperative memory management.

config CMM_IUCV
	bool "IUCV special message interface to cooperative memory management"
	depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
	help
	  Select this option to enable the special message interface to
	  the cooperative memory management.

config VIRT_TIMER
	bool "Virtual CPU timer support"
	help
	  This provides a kernel interface for virtual CPU timers.
	  Default is disabled.

config VIRT_CPU_ACCOUNTING
	bool "Base user process accounting on virtual cpu timer"
	depends on VIRT_TIMER
	help
	  Select this option to use CPU timer deltas to do user
	  process accounting.

config APPLDATA_BASE
	bool "Linux - VM Monitor Stream, base infrastructure"
	depends on PROC_FS && VIRT_TIMER=y
	help
	  This provides a kernel interface for creating and updating z/VM APPLDATA
	  monitor records. The monitor records are updated at certain time
	  intervals, once the timer is started.
	  Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
	  i.e. enables or disables monitoring on the Linux side.
	  A custom interval value (in seconds) can be written to
	  /proc/appldata/interval.

	  Defaults are 60 seconds interval and timer off.
	  The /proc entries can also be read from, showing the current settings.

config APPLDATA_MEM
	tristate "Monitor memory management statistics"
	depends on APPLDATA_BASE && VM_EVENT_COUNTERS
	help
	  This provides memory management related data to the Linux - VM Monitor
	  Stream, like paging/swapping rate, memory utilisation, etc.
	  Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
	  APPLDATA monitor record, i.e. enables or disables monitoring this record
	  on the z/VM side.

	  Default is disabled.
	  The /proc entry can also be read from, showing the current settings.

	  This can also be compiled as a module, which will be called
	  appldata_mem.o.

config APPLDATA_OS
	tristate "Monitor OS statistics"
	depends on APPLDATA_BASE
	help
	  This provides OS related data to the Linux - VM Monitor Stream, like
	  CPU utilisation, etc.
	  Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
	  APPLDATA monitor record, i.e. enables or disables monitoring this record
	  on the z/VM side.

	  Default is disabled.
	  This can also be compiled as a module, which will be called
	  appldata_os.o.

config APPLDATA_NET_SUM
	tristate "Monitor overall network statistics"
	depends on APPLDATA_BASE
	help
	  This provides network related data to the Linux - VM Monitor Stream,
	  currently there is only a total sum of network I/O statistics, no
	  per-interface data.
	  Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
	  APPLDATA monitor record, i.e. enables or disables monitoring this record
	  on the z/VM side.

	  Default is disabled.
	  This can also be compiled as a module, which will be called
	  appldata_net_sum.o.

source kernel/Kconfig.hz

config NO_IDLE_HZ
	bool "No HZ timer ticks in idle"
	help
	  Switches the regular HZ timer off when the system is going idle.
	  This helps z/VM to detect that the Linux system is idle. VM can
	  then "swap-out" this guest which reduces memory usage. It also
	  reduces the overhead of idle systems.

	  The HZ timer can be switched on/off via /proc/sys/kernel/hz_timer.
	  hz_timer=0 means HZ timer is disabled. hz_timer=1 means HZ
	  timer is active.

config NO_IDLE_HZ_INIT
	bool "HZ timer in idle off by default"
	depends on NO_IDLE_HZ
	help
	  The HZ timer is switched off in idle by default. That means the
	  HZ timer is already disabled at boot time.

config S390_HYPFS_FS
	bool "s390 hypervisor file system support"
	select SYS_HYPERVISOR
	default y
	help
	  This is a virtual file system intended to provide accounting
	  information in an s390 hypervisor environment.

config KEXEC
	bool "kexec system call"
	help
	  kexec is a system call that implements the ability to shutdown your
	  current kernel, and to start another kernel.  It is like a reboot
	  but is independent of hardware/microcode support.

config ZFCPDUMP
	tristate "zfcpdump support"
	select SMP
	default n
	help
	  Select this option if you want to build an zfcpdump enabled kernel.
	  Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.

endmenu

source "net/Kconfig"

config PCMCIA
	def_bool n

config CCW
	def_bool y

source "drivers/Kconfig"

source "fs/Kconfig"

source "kernel/Kconfig.instrumentation"

source "arch/s390/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"