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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 | |
35 | config 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 | |
42 | config 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 | |
61 | config 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 |
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