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