| config 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.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. |
| |
| config PROC_KCORE |
| bool "/proc/kcore support" if !ARM |
| depends on PROC_FS && MMU |
| select CRASH_CORE |
| 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. |
| |
| config PROC_SYSCTL |
| bool "Sysctl support (/proc/sys)" if EXPERT |
| depends on PROC_FS |
| select SYSCTL |
| 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/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" |
| default n |
| help |
| Provides a fast way to retrieve first level children pids of a task. See |
| <file:Documentation/filesystems/proc.txt> 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_STRIPPED |
| default n |
| depends on EXPERT |
| bool "Strip non-essential /proc functionality to reduce code size" |
| |
| config PROC_UID |
| bool "Include /proc/uid/ files" |
| depends on PROC_FS && RT_MUTEXES |
| help |
| Provides aggregated per-uid information under /proc/uid. |