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.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

  1# SPDX-License-Identifier: GPL-2.0-only
  2config PROC_FS
  3	bool "/proc file system support" if EXPERT
  4	default y
  5	help
  6	  This is a virtual file system providing information about the status
  7	  of the system. "Virtual" means that it doesn't take up any space on
  8	  your hard disk: the files are created on the fly by the kernel when
  9	  you try to access them. Also, you cannot read the files with older
 10	  version of the program less: you need to use more or cat.
 11
 12	  It's totally cool; for example, "cat /proc/interrupts" gives
 13	  information about what the different IRQs are used for at the moment
 14	  (there is a small number of Interrupt ReQuest lines in your computer
 15	  that are used by the attached devices to gain the CPU's attention --
 16	  often a source of trouble if two devices are mistakenly configured
 17	  to use the same IRQ). The program procinfo to display some
 18	  information about your system gathered from the /proc file system.
 19
 20	  Before you can use the /proc file system, it has to be mounted,
 21	  meaning it has to be given a location in the directory hierarchy.
 22	  That location should be /proc. A command such as "mount -t proc proc
 23	  /proc" or the equivalent line in /etc/fstab does the job.
 24
 25	  The /proc file system is explained in the file
 26	  <file:Documentation/filesystems/proc.rst> and on the proc(5) manpage
 27	  ("man 5 proc").
 28
 29	  This option will enlarge your kernel by about 67 KB. Several
 30	  programs depend on this, so everyone should say Y here.
 31
 32config PROC_KCORE
 33	bool "/proc/kcore support" if !ARM
 34	depends on PROC_FS && MMU
 35	select CRASH_CORE
 36	help
 37	  Provides a virtual ELF core file of the live kernel.  This can
 38	  be read with gdb and other ELF tools.  No modifications can be
 39	  made using this mechanism.
 40
 41config PROC_VMCORE
 42	bool "/proc/vmcore support"
 43	depends on PROC_FS && CRASH_DUMP
 44	default y
 45	help
 46	  Exports the dump image of crashed kernel in ELF format.
 47
 48config PROC_VMCORE_DEVICE_DUMP
 49	bool "Device Hardware/Firmware Log Collection"
 50	depends on PROC_VMCORE
 51	default n
 52	help
 53	  After kernel panic, device drivers can collect the device
 54	  specific snapshot of their hardware or firmware before the
 55	  underlying devices are initialized in crash recovery kernel.
 56	  Note that the device driver must be present in the crash
 57	  recovery kernel's initramfs to collect its underlying device
 58	  snapshot.
 59
 60	  If you say Y here, the collected device dumps will be added
 61	  as ELF notes to /proc/vmcore. You can still disable device
 62	  dump using the kernel command line option 'novmcoredd'.
 63
 64config PROC_SYSCTL
 65	bool "Sysctl support (/proc/sys)" if EXPERT
 66	depends on PROC_FS
 67	select SYSCTL
 68	default y
 69	help
 70	  The sysctl interface provides a means of dynamically changing
 71	  certain kernel parameters and variables on the fly without requiring
 72	  a recompile of the kernel or reboot of the system.  The primary
 73	  interface is through /proc/sys.  If you say Y here a tree of
 74	  modifiable sysctl entries will be generated beneath the
 75	  /proc/sys directory. They are explained in the files
 76	  in <file:Documentation/admin-guide/sysctl/>.  Note that enabling this
 77	  option will enlarge the kernel by at least 8 KB.
 78
 79	  As it is generally a good thing, you should say Y here unless
 80	  building a kernel for install/rescue disks or your system is very
 81	  limited in memory.
 82
 83config PROC_PAGE_MONITOR
 84 	default y
 85	depends on PROC_FS && MMU
 86	bool "Enable /proc page monitoring" if EXPERT
 87 	help
 88	  Various /proc files exist to monitor process memory utilization:
 89	  /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,
 90	  /proc/kpagecount, and /proc/kpageflags. Disabling these
 91	  interfaces will reduce the size of the kernel by approximately 4kb.
 92
 93config PROC_CHILDREN
 94	bool "Include /proc/<pid>/task/<tid>/children file"
 95	depends on PROC_FS
 96	default n
 97	help
 98	  Provides a fast way to retrieve first level children pids of a task. See
 99	  <file:Documentation/filesystems/proc.rst> for more information.
100
101	  Say Y if you are running any user-space software which takes benefit from
102	  this interface. For example, rkt is such a piece of software.
103
104config PROC_PID_ARCH_STATUS
105	def_bool n
106	depends on PROC_FS
107
108config PROC_CPU_RESCTRL
109	def_bool n
110	depends on PROC_FS