# SPDX-License-Identifier: GPL-2.0-onlyconfig PROC_FS	bool "/proc file system support" if EXPERT	default y	help	  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	  <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. config PROC_KCORE	bool "/proc/kcore support" if !ARM	depends on PROC_FS && MMU	select VMCORE_INFO	help	  Provides a virtual ELF core file of the live kernel.  This can	  be read with gdb and other ELF tools.  No modifications can be	  made using this mechanism. config PROC_VMCORE	bool "/proc/vmcore support"	depends on PROC_FS && CRASH_DUMP	default y	help	  Exports the dump image of crashed kernel in ELF format. config PROC_VMCORE_DEVICE_DUMP	bool "Device Hardware/Firmware Log Collection"	depends on PROC_VMCORE	default n	help	  After kernel panic, device drivers can collect the device	  specific snapshot of their hardware or firmware before the	  underlying devices are initialized in crash recovery kernel.	  Note that the device driver must be present in the crash	  recovery kernel's initramfs to collect its underlying device	  snapshot. 	  If you say Y here, the collected device dumps will be added	  as ELF notes to /proc/vmcore. You can still disable device	  dump using the kernel command line option 'novmcoredd'. config NEED_PROC_VMCORE_DEVICE_RAM	bool config PROC_VMCORE_DEVICE_RAM	def_bool y	depends on PROC_VMCORE && NEED_PROC_VMCORE_DEVICE_RAM	depends on VIRTIO_MEM	help	  If the elfcore hdr is allocated and prepared by the dump kernel	  ("2nd kernel") instead of the crashed kernel, RAM provided by memory	  devices such as virtio-mem will not be included in the dump	  image, because only the device driver can properly detect them. 	  With this config enabled, these RAM ranges will be queried from the	  device drivers once the device gets probed, so they can be included	  in the crash dump. 	  Relevant architectures should select NEED_PROC_VMCORE_DEVICE_RAM. config SYSCTL	bool "Sysctl support (/proc/sys)" if EXPERT	depends on PROC_FS	default y	help	  The sysctl interface provides a means of dynamically changing	  certain kernel parameters and variables on the fly without requiring	  a recompile of the kernel or reboot of the system.  The primary	  interface is through /proc/sys.  If you say Y here a tree of	  modifiable sysctl entries will be generated beneath the	  /proc/sys directory. They are explained in the files	  in <file:Documentation/admin-guide/sysctl/>.  Note that enabling this	  option will enlarge the kernel by at least 8 KB. 	  As it is generally a good thing, you should say Y here unless	  building a kernel for install/rescue disks or your system is very	  limited in memory. config PROC_PAGE_MONITOR 	default y	depends on PROC_FS && MMU	bool "Enable /proc page monitoring" if EXPERT 	help	  Various /proc files exist to monitor process memory utilization:	  /proc/pid/smaps, /proc/pid/clear_refs, /proc/pid/pagemap,	  /proc/kpagecount, and /proc/kpageflags. Disabling these	  interfaces will reduce the size of the kernel by approximately 4kb. config PROC_CHILDREN	bool "Include /proc/<pid>/task/<tid>/children file"	depends on PROC_FS	default n	help	  Provides a fast way to retrieve first level children pids of a task. See	  <file:Documentation/filesystems/proc.rst> for more information. 	  Say Y if you are running any user-space software which takes benefit from	  this interface. For example, rkt is such a piece of software. config PROC_PID_ARCH_STATUS	def_bool n	depends on PROC_FS config PROC_CPU_RESCTRL	def_bool n	depends on PROC_FS