2009-01-22 14:40:58 +07:00
|
|
|
config SYSFS
|
2011-01-21 05:44:16 +07:00
|
|
|
bool "sysfs file system support" if EXPERT
|
2009-01-22 14:40:58 +07:00
|
|
|
default y
|
2014-02-04 02:09:17 +07:00
|
|
|
select KERNFS
|
2009-01-22 14:40:58 +07:00
|
|
|
help
|
|
|
|
|
The sysfs filesystem is a virtual filesystem that the kernel uses to
|
|
|
|
|
export internal kernel objects, their attributes, and their
|
|
|
|
|
relationships to one another.
|
|
|
|
|
|
|
|
|
|
Users can use sysfs to ascertain useful information about the running
|
|
|
|
|
kernel, such as the devices the kernel has discovered on each bus and
|
|
|
|
|
which driver each is bound to. sysfs can also be used to tune devices
|
|
|
|
|
and other kernel subsystems.
|
|
|
|
|
|
|
|
|
|
Some system agents rely on the information in sysfs to operate.
|
|
|
|
|
/sbin/hotplug uses device and object attributes in sysfs to assist in
|
|
|
|
|
delegating policy decisions, like persistently naming devices.
|
|
|
|
|
|
|
|
|
|
sysfs is currently used by the block subsystem to mount the root
|
|
|
|
|
partition. If sysfs is disabled you must specify the boot device on
|
|
|
|
|
the kernel boot command line via its major and minor numbers. For
|
|
|
|
|
example, "root=03:01" for /dev/hda1.
|
|
|
|
|
|
|
|
|
|
Designers of embedded systems may wish to say N here to conserve space.
|
