fs/proc/Kconfig

   1 config PROC_FS
   2         bool "/proc file system support" if EXPERT
   3         default y
   4         help
   5           This is a virtual file system providing information about the status
   6           of the system. "Virtual" means that it doesn't take up any space on
   7           your hard disk: the files are created on the fly by the kernel when
   8           you try to access them. Also, you cannot read the files with older
   9           version of the program less: you need to use more or cat.
  10
  11           It's totally cool; for example, "cat /proc/interrupts" gives
  12           information about what the different IRQs are used for at the moment
  13           (there is a small number of Interrupt ReQuest lines in your computer
  14           that are used by the attached devices to gain the CPU's attention --
  15           often a source of trouble if two devices are mistakenly configured
  16           to use the same IRQ). The program procinfo to display some
  17           information about your system gathered from the /proc file system.
  18
  19           Before you can use the /proc file system, it has to be mounted,
  20           meaning it has to be given a location in the directory hierarchy.
  21           That location should be /proc. A command such as "mount -t proc proc
  22           /proc" or the equivalent line in /etc/fstab does the job.
  23
  24           The /proc file system is explained in the file
  25           <file:Documentation/filesystems/proc.txt> and on the proc(5) manpage
  26           ("man 5 proc").
  27
  28           This option will enlarge your kernel by about 67 KB. Several
  29           programs depend on this, so everyone should say Y here.
  30
  31 config PROC_KCORE
  32         bool "/proc/kcore support" if !ARM
  33         depends on PROC_FS && MMU
  34         help
  35           Provides a virtual ELF core file of the live kernel.  This can
  36           be read with gdb and other ELF tools.  No modifications can be
  37           made using this mechanism.
  38
  39 config PROC_VMCORE
  40         bool "/proc/vmcore support"
  41         depends on PROC_FS && CRASH_DUMP
  42         default y
  43         help
  44         Exports the dump image of crashed kernel in ELF format.
  45
  46 config PROC_SYSCTL
  47         bool "Sysctl support (/proc/sys)" if EXPERT
  48         depends on PROC_FS
  49         select SYSCTL
  50         default y
  51         ---help---
  52           The sysctl interface provides a means of dynamically changing
  53           certain kernel parameters and variables on the fly without requiring
  54           a recompile of the kernel or reboot of the system.  The primary
  55           interface is through /proc/sys.  If you say Y here a tree of
  56           modifiable sysctl entries will be generated beneath the
  57           /proc/sys directory. They are explained in the files
  58           in <file:Documentation/sysctl/>.  Note that enabling this
  59           option will enlarge the kernel by at least 8 KB.
  60
  61           As it is generally a good thing, you should say Y here unless
  62           building a kernel for install/rescue disks or your system is very
  63           limited in memory.
  64
  65 config PROC_PAGE_MONITOR
  66         default y
  67         depends on PROC_FS && MMU
  68         bool "Enable /proc page monitoring" if EXPERT
  69         help
  70           Various /proc files exist to monitor process memory utilization:
  71           /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,
  72           /proc/kpagecount, and /proc/kpageflags. Disabling these
  73           interfaces will reduce the size of the kernel by approximately 4kb.
  74
  75 config PROC_CHILDREN
  76         bool "Include /proc/<pid>/task/<tid>/children file"
  77         default n
  78         help
  79           Provides a fast way to retrieve first level children pids of a task. See
  80           <file:Documentation/filesystems/proc.txt> for more information.
  81
  82           Say Y if you are running any user-space software which takes benefit from
  83           this interface. For example, rkt is such a piece of software.