Abstract: Techniques are provided for maintaining and recomputing reference counts in a persistent memory file system of a node. Primary reference counts are maintained for pages within persistent memory of the node. In response to receiving a first operation to link a page into a persistent memory file system of the persistent memory, a primary reference count of the page is incremented before linking the page into the persistent memory file system. In response to receiving a second operation to unlink the page from the persistent memory file system, the page is unlinked from the persistent memory file system before the primary reference count is decremented. Upon the node recovering from a crash, the persistent memory file system is traversed in order to update shadow reference counts for the pages with correct reference count values, which are used to overwrite the primary reference counts with the correct reference count values.

Abstract: Techniques are provided for implementing write ordering for persistent memory. A set of actions are identified for commitment to persistent memory of a node for executing an operation upon the persistent memory. An episode is created to comprise a first subset of actions of the set of actions that can be committed to the persistent memory in any order with respect to one another such that a consistent state of the persistent memory can be reconstructed in the event of a crash of the node during execution of the operation. The first subset of actions within the episode are committed to the persistent memory and further execution of the operation is blocked until the episode completes.

Abstract: A device in a wireless device security system may include at least one processor configured to determine a location of the device with respect to a security area. The at least one processor may be further configured to provide an alert output when the determined location of the device is proximate to a boundary of the security area. The at least one processor may be further configured to prevent the device from responding to at least some user input when the determined location of the device is outside of the security area. The at least one processor may be further configured to provide a disturbance output when the determined location of the device is outside of the security area.

Abstract: A device in a wireless device security system may include at least one processor configured to determine a location of the device with respect to a security area. The at least one processor may be further configured to provide an alert output when the determined location of the device is proximate to a boundary of the security area. The at least one processor may be further configured to prevent the device from responding to at least some user input when the determined location of the device is outside of the security area. The at least one processor may be further configured to provide a disturbance output when the determined location of the device is outside of the security area.

Abstract: A device in a wireless device security system may include at least one processor configured to determine a location of the device with respect to a security area. The at least one processor may be further configured to provide an alert output when the determined location of the device is proximate to a boundary of the security area. The at least one processor may be further configured to prevent the device from responding to at least some user input when the determined location of the device is outside of the security area. The at least one processor may be further configured to provide a disturbance output when the determined location of the device is outside of the security area.

Abstract: A device in a wireless device security system may include at least one processor configured to determine a location of the device with respect to a security area. The at least one processor may be further configured to provide an alert output when the determined location of the device is proximate to a boundary of the security area. The at least one processor may be further configured to prevent the device from responding to at least some user input when the determined location of the device is outside of the security area. The at least one processor may be further configured to provide a disturbance output when the determined location of the device is outside of the security area.

Abstract: An information handling system projector cooling fan runs for a variably defined time after its lamp is turned off in order to adequately cool the projector without running the cooling fan for an excessive cool down period. In one embodiment, the cooling fan runs after lamp shut down until one or more thermocouples detects a predetermined temperature associated with the projector. In an alternative embodiment, fan cool down time varies based on the length of time the lamp was on before shutdown. The cool down thermal gradient is selectable between a convenience mode, in which an increased cooling gradient allows quicker cooling fan shut down, and a long-life mode, in which a decreased cooling gradient preserves lamp life.

Abstract: An information handling system projector cooling fan runs for a variably defined time after its lamp is turned off in order to adequately cool the projector without running the cooling fan for an excessive cool down period. In one embodiment, the cooling fan runs after lamp shut down until one or more thermocouples detects a predetermined temperature associated with the projector. In an alternative embodiment, fan cool down time varies based on the length of time the lamp was on before shutdown. The cool down thermal gradient is selectable between a convenience mode, in which an increased cooling gradient allows quicker cooling fan shut down, and a long-life mode, in which a decreased cooling gradient preserves lamp life.