projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5f3a211a | 1 | config SYSFS |
| 6a108a14 | 2 | bool "sysfs file system support" if EXPERT |
| 5f3a211a | 3 | default y |
| ba341d55 | 4 | select KERNFS |
| 5f3a211a AD |
5 | help |
| 6 | The sysfs filesystem is a virtual filesystem that the kernel uses to | |
| 7 | export internal kernel objects, their attributes, and their | |
| 8 | relationships to one another. | |
| 9 | ||
| 10 | Users can use sysfs to ascertain useful information about the running | |
| 11 | kernel, such as the devices the kernel has discovered on each bus and | |
| 12 | which driver each is bound to. sysfs can also be used to tune devices | |
| 13 | and other kernel subsystems. | |
| 14 | ||
| 15 | Some system agents rely on the information in sysfs to operate. | |
| 16 | /sbin/hotplug uses device and object attributes in sysfs to assist in | |
| 17 | delegating policy decisions, like persistently naming devices. | |
| 18 | ||
| 19 | sysfs is currently used by the block subsystem to mount the root | |
| 20 | partition. If sysfs is disabled you must specify the boot device on | |
| 21 | the kernel boot command line via its major and minor numbers. For | |
| 22 | example, "root=03:01" for /dev/hda1. | |
| 23 | ||
| 24 | Designers of embedded systems may wish to say N here to conserve space. |