LXR linux/fs/proc/Kconfig

   1config 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
  31config PROC_KCORE
  32        bool "/proc/kcore support" if !ARM
  33        depends on PROC_FS && MMU
  34
  35config PROC_VMCORE
  36        bool "/proc/vmcore support"
  37        depends on PROC_FS && CRASH_DUMP
  38        default y
  39        help
  40        Exports the dump image of crashed kernel in ELF format.
  41
  42config PROC_SYSCTL
  43        bool "Sysctl support (/proc/sys)" if EXPERT
  44        depends on PROC_FS
  45        select SYSCTL
  46        default y
  47        ---help---
  48          The sysctl interface provides a means of dynamically changing
  49          certain kernel parameters and variables on the fly without requiring
  50          a recompile of the kernel or reboot of the system.  The primary
  51          interface is through /proc/sys.  If you say Y here a tree of
  52          modifiable sysctl entries will be generated beneath the
  53          /proc/sys directory. They are explained in the files
  54          in <file:Documentation/sysctl/>.  Note that enabling this
  55          option will enlarge the kernel by at least 8 KB.
  56
  57          As it is generally a good thing, you should say Y here unless
  58          building a kernel for install/rescue disks or your system is very
  59          limited in memory.
  60
  61config PROC_PAGE_MONITOR
  62        default y
  63        depends on PROC_FS && MMU
  64        bool "Enable /proc page monitoring" if EXPERT
  65        help
  66          Various /proc files exist to monitor process memory utilization:
  67          /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,
  68          /proc/kpagecount, and /proc/kpageflags. Disabling these
  69          interfaces will reduce the size of the kernel by approximately 4kb.
  70