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109 lines
4.1 KiB
109 lines
4.1 KiB
# SPDX-License-Identifier: GPL-2.0-only |
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config PROC_FS |
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bool "/proc file system support" if EXPERT |
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default y |
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help |
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This is a virtual file system providing information about the status |
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of the system. "Virtual" means that it doesn't take up any space on |
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your hard disk: the files are created on the fly by the kernel when |
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you try to access them. Also, you cannot read the files with older |
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version of the program less: you need to use more or cat. |
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It's totally cool; for example, "cat /proc/interrupts" gives |
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information about what the different IRQs are used for at the moment |
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(there is a small number of Interrupt ReQuest lines in your computer |
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that are used by the attached devices to gain the CPU's attention -- |
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often a source of trouble if two devices are mistakenly configured |
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to use the same IRQ). The program procinfo to display some |
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information about your system gathered from the /proc file system. |
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Before you can use the /proc file system, it has to be mounted, |
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meaning it has to be given a location in the directory hierarchy. |
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That location should be /proc. A command such as "mount -t proc proc |
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/proc" or the equivalent line in /etc/fstab does the job. |
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The /proc file system is explained in the file |
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<file:Documentation/filesystems/proc.rst> and on the proc(5) manpage |
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("man 5 proc"). |
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This option will enlarge your kernel by about 67 KB. Several |
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programs depend on this, so everyone should say Y here. |
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config PROC_KCORE |
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bool "/proc/kcore support" if !ARM |
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depends on PROC_FS && MMU |
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select CRASH_CORE |
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help |
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Provides a virtual ELF core file of the live kernel. This can |
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be read with gdb and other ELF tools. No modifications can be |
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made using this mechanism. |
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config PROC_VMCORE |
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bool "/proc/vmcore support" |
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depends on PROC_FS && CRASH_DUMP |
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default y |
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help |
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Exports the dump image of crashed kernel in ELF format. |
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config PROC_VMCORE_DEVICE_DUMP |
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bool "Device Hardware/Firmware Log Collection" |
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depends on PROC_VMCORE |
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default n |
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help |
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After kernel panic, device drivers can collect the device |
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specific snapshot of their hardware or firmware before the |
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underlying devices are initialized in crash recovery kernel. |
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Note that the device driver must be present in the crash |
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recovery kernel's initramfs to collect its underlying device |
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snapshot. |
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If you say Y here, the collected device dumps will be added |
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as ELF notes to /proc/vmcore. You can still disable device |
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dump using the kernel command line option 'novmcoredd'. |
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config PROC_SYSCTL |
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bool "Sysctl support (/proc/sys)" if EXPERT |
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depends on PROC_FS |
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select SYSCTL |
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default y |
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help |
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The sysctl interface provides a means of dynamically changing |
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certain kernel parameters and variables on the fly without requiring |
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a recompile of the kernel or reboot of the system. The primary |
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interface is through /proc/sys. If you say Y here a tree of |
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modifiable sysctl entries will be generated beneath the |
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/proc/sys directory. They are explained in the files |
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in <file:Documentation/admin-guide/sysctl/>. Note that enabling this |
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option will enlarge the kernel by at least 8 KB. |
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As it is generally a good thing, you should say Y here unless |
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building a kernel for install/rescue disks or your system is very |
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limited in memory. |
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config PROC_PAGE_MONITOR |
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default y |
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depends on PROC_FS && MMU |
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bool "Enable /proc page monitoring" if EXPERT |
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help |
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Various /proc files exist to monitor process memory utilization: |
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/proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap, |
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/proc/kpagecount, and /proc/kpageflags. Disabling these |
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interfaces will reduce the size of the kernel by approximately 4kb. |
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config PROC_CHILDREN |
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bool "Include /proc/<pid>/task/<tid>/children file" |
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default n |
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help |
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Provides a fast way to retrieve first level children pids of a task. See |
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<file:Documentation/filesystems/proc.rst> for more information. |
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Say Y if you are running any user-space software which takes benefit from |
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this interface. For example, rkt is such a piece of software. |
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config PROC_PID_ARCH_STATUS |
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def_bool n |
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depends on PROC_FS |
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config PROC_CPU_RESCTRL |
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def_bool n |
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depends on PROC_FS
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