The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
The sysfs virtual file system presents a
user-spec view of the devices in the system, which changes
dynamically whenever a device is inserted or removed. The
directory hierarchy under /sys represents the
global, bus, and device discovery layers. The files in the global
layer report the power state of the device, which can also be set.
The files in the bus layer report information such as the IRQ
number and resources for each device. A device driver can also
expose data or tunable interfaces via files in the file system.