CONFIG_PROC_FS: /proc file system support

General informations

The Linux kernel configuration item CONFIG_PROC_FS has multiple definitions:

/proc file system support found in fs/proc/Kconfig

The configuration item CONFIG_PROC_FS:

• prompt: /proc file system support
• type: bool
• depends on: CONFIG_EXPERT
• defined in fs/proc/Kconfig
• found in Linux kernels: 2.6.27–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD

Help text

This is a virtual file system providing information about the status of the system. "Virtual" means that it doesn't take up any space on your hard disk: the files are created on the fly by the kernel when you try to access them. Also, you cannot read the files with older version of the program less: you need to use more or cat.

It's totally cool; for example, "cat /proc/interrupts" gives information about what the different IRQs are used for at the moment (there is a small number of Interrupt ReQuest lines in your computer that are used by the attached devices to gain the CPU's attention -- often a source of trouble if two devices are mistakenly configured to use the same IRQ). The program procinfo to display some information about your system gathered from the /proc file system.

Before you can use the /proc file system, it has to be mounted, meaning it has to be given a location in the directory hierarchy. That location should be /proc. A command such as "mount -t proc proc /proc" or the equivalent line in /etc/fstab does the job.

The /proc file system is explained in the file Documentation/filesystems/proc.rst and on the proc(5) manpage ("man 5 proc").

This option will enlarge your kernel by about 67 KB. Several programs depend on this, so everyone should say Y here.

/proc file system support found in fs/Kconfig

The configuration item CONFIG_PROC_FS:

• prompt: /proc file system support
• type: bool
• depends on: CONFIG_EMBEDDED
• defined in fs/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.26

Help text

This is a virtual file system providing information about the status of the system. "Virtual" means that it doesn't take up any space on your hard disk: the files are created on the fly by the kernel when you try to access them. Also, you cannot read the files with older version of the program less: you need to use more or cat.

It's totally cool; for example, "cat /proc/interrupts" gives information about what the different IRQs are used for at the moment (there is a small number of Interrupt ReQuest lines in your computer that are used by the attached devices to gain the CPU's attention -- often a source of trouble if two devices are mistakenly configured to use the same IRQ). The program procinfo to display some information about your system gathered from the /proc file system.

Before you can use the /proc file system, it has to be mounted, meaning it has to be given a location in the directory hierarchy. That location should be /proc. A command such as "mount -t proc proc /proc" or the equivalent line in /etc/fstab does the job.

The /proc file system is explained in the file Documentation/filesystems/proc.txt and on the proc(5) manpage ("man 5 proc").

This option will enlarge your kernel by about 67 KB. Several programs depend on this, so everyone should say Y here.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb fs "proc" : CONFIG_PROC_FS : fs/proc/root.c # in 2.5.45–2.5.75, 2.6.0–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.12, 6.13-rc+HEAD

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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