Abstract: This disclosure is directed to a system for address mapping and translation protection. In one embodiment, processing circuitry may include a virtual machine manager (VMM) to control specific guest linear address (GLA) translations. Control may be implemented in a performance sensitive and secure manner, and may be capable of improving performance for critical linear address page walks over legacy operation by removing some or all of the cost of page walking extended page tables (EPTs) for critical mappings. Alone or in combination with the above, certain portions of a page table structure may be selectively made immutable by a VMM or early boot process using a sub-page policy (SPP). For example, SPP may enable non-volatile kernel and/or user space code and data virtual-to-physical memory mappings to be made immutable (e.g., non-writable) while allowing for modifications to non-protected portions of the OS paging structures and particularly the user space.

Abstract: Apparatus and methods are disclosed including a memory device or a memory controller configured to receive, from a host device over a host interface, a request for a device descriptor of a memory device, and to send to the host, over the host interface, the device descriptor, the device descriptor including voltage supply capability fields that are set to indicate supported voltages of the memory device, the supported voltages selected from a plurality of discrete voltages. The host device can utilize the supported voltages to supply an appropriate voltage to the memory device. Methods of operation are disclosed, as well as machine-readable medium, a host computing device, and other embodiments.

Abstract: A cache coherence technique for operating a multi-processor system including shared memory includes allocating a cache line of a cache memory of a processor to a memory address in the shared memory in response to execution of an instruction of a program executing on the processor. The technique includes encoding a shared information state of the cache line to indicate whether the memory address is a shared memory address shared by the processor and a second processor, or a private memory address private to the processor, in response to whether the instruction is included in a critical section of the program, the critical section being a portion of the program that confines access to shared, writeable data.

Abstract: Provided are a computer program product, system, and method for using a machine learning module to determine when to replace a storage device. Input on attributes of the storage device is provided to a machine learning module to produce an output value. A determination is made whether the output value indicates to replace the storage device. Indication is made to replace the storage device in response to determining that the output value indicates to replace the storage device.

Abstract: Provided are a computer program product, system, and method for using a machine learning module to determine when to replace a storage device. Input on attributes of the storage device is provided to a machine learning module to produce an output value. A determination is made whether the output value indicates to replace the storage device. Indication is made to replace the storage device in response to determining that the output value indicates to replace the storage device.

Abstract: Embodiments of the present disclosure provide a cache management method, storage system and computer program product. The cache management method includes determining an access frequency for each of a plurality of cache pages in a storage system. The method further includes organizing the plurality of cache pages into a plurality of queues based on the access frequency. The method further includes allocating solid-state disks for the plurality of queues based on the access frequency, so that queues where pages with higher access frequency are located have more solid state disks.

Abstract: Techniques that facilitate hybrid memory access frequency are provided. In one example, a system stores access frequency data for storage class memory and volatile memory in a translation lookaside buffer. The access frequency data is indicative of a frequency of access to the storage class memory and the volatile memory. The system also determines whether to store data in the storage class memory or the volatile memory based on the access frequency data stored in the translation lookaside buffer.

Abstract: A memory management unit receives a transaction request to perform an operation with respect to data in memory, the transaction request including control information. The memory management unit identifies, based on the control information, one of a plurality of versions of a given memory data, where the plurality of versions of the given memory data include a first version of the given memory data and a second version of the given memory data that is modified from the first version. The memory management unit accesses the identified version of the given memory data in response to the transaction request.

Abstract: Apparatus, methods, and computer-readable media for programming, reading, and servicing non-volatile storage device to improve data retention time and data density are disclosed. According to one embodiment, a method of managing a non-volatile memory storage device includes generating output values based on an expected pattern of discrete states stored in memory cells of the storage device, comparing output values for the memory cells to expected output values using a pre-selected threshold, and based on the comparing, programming other memory cells of the storage device to refresh the programming of the other memory cells. Methods of performing service and management operations for interrupting a host system coupled a non-volatile memory storage device are also disclosed.

Abstract: Particular embodiments described herein provide for an electronic device that can be configured to receive a request for data, wherein the request is received on a system that regularly stores data in a cache and provide the requested data without causing the data or an address of the data to be cached or for changes to the cache to occur. In an example, the requested data is already in a level 1 cache, level 2 cache, or last level cache and the cache does not change its state. Also, a snoop request can be broadcasted to acquire the requested data and the snoop request is a read request and not a request for ownership of the data. In addition, changes to a translation lookaside buffer when the data was obtained using a linear to physical address translation is prevented.

Abstract: A method includes monitoring a sequence of transactions in one or more volumes. The transactions are transferred to a primary storage (112) in a given order, and are replicated to a secondary storage (114). The volumes belong to a volume group (204) for which the transactions are guaranteed to be replicated while retaining the given order. Artificial write transactions (228) are periodically issued to a protection application field, which is predefined in a given volume (212) belonging to the volume group. Records indicative of the transactions, including the artificial transactions, are stored in a disaster-proof storage unit (144). Upon verifying that a given artificial transaction has been successfully replicated in the secondary storage, the records corresponding to the given artificial write transaction and the transactions that precede it in the sequence are deleted from the disaster-proof storage unit.

Abstract: A method, computer program product, computing system, and system for recovery of virtual machine files are described. The method may include creating a backup archive file, the backup archive file including a backup of a first virtual disk corresponding to a virtual machine hosted by a virtualization host device. The method may further include storing the backup archive file including the backup. The method may also include creating a second virtual disk that emulates the first virtual disk using data from the backup archive file. The method may additionally include communicatively attaching the second virtual disk to the virtual machine hosted by the virtualization host device. Moreover, the method may include transferring data from the second virtual disk to the first virtual disk corresponding to the virtual machine hosted by the virtualization host device.

Abstract: A solid state drive (SSD) includes dynamic random access memory (DRAM), flash memory, and a solid state drive (SSD) controller. The solid state drive (SSD) also includes a peripheral component interconnect express (PCIe) bus to connect the SSD to a computing device such that a central processing unit (CPU) of the computing device exclusively reads data from, and writes data to, the DRAM. The SSD controller writes data to the flash memory from the DRAM independently of received commands from the computing device.

Abstract: A set of device maintenance related data is received from each of a plurality of non-volatile memory modules. Each of the plurality of non-volatile memory modules comprise a plurality of non-volatile memory devices. Based at least in part on said set of device maintenance related data a maintenance operation to be performed is determined. The determined device maintenance related operation is performed.

Abstract: A storage control system acquires, for each of a plurality of power control groups in which a plurality of storage devices which form the basis of a plurality of redundancy configuration groups are classified, an I/O (Input/Output) amount of the power control group. For each of the plurality of power control groups, the storage control system controls power consumption of each of the storage devices belonging to the power control group in power control group units, based on the acquired I/O amount relating to the power control group. None of the plurality of redundancy configuration groups spans two or more power control groups among the plurality of power control groups, all being contained in any of the plurality of power control groups.

Abstract: An optimized solution for accessing virtual machine state while restoration of a respective virtual machine is underway. Specifically, the optimized solution disclosed herein implements a fetching mechanism for retrieving granular virtual machine state over a network and/or from a remote storage system. The fetching mechanism leverages block allocation information in parallel with disk caching to provide instant (or near instant) access to a virtual machine state while also, concurrently, restoring the respective virtual machine.

Abstract: Embodiments provide for a processor including a cache a caching agent and a processing node to decode an instruction including at least one operand specifying an address range within a distributed shared memory (DSM) and perform a flush to a first of a plurality of memory devices in the DSM at the specified address range.

Abstract: A data processing system includes a plurality of processing units and a system memory coupled to a memory controller. The system memory includes a persistent memory device and a non-persistent cache interposed between the memory controller and the persistent memory device. The memory controller receives a flush request of a particular processing unit among the plurality of processing units, the flush request specifying a target address. The memory controller, responsive to the flush request, ensures flushing of a target cache line of data identified by target address from the non-persistent cache into the persistent memory device.

Abstract: A method, article of manufacture, and apparatus for providing a site cache manager is discussed. Data objects may be read from a site cache rather than an authoritative object store. This provides performance benefits when a client reading the data has a better connection to the site cache than to the authoritative object store. The site cache manager controls the volume of stored data on the site cache to enhance performance by increasing the frequency of data object being read from or written to the site cache rather than the authoritative object store.

Abstract: The present application discloses a cascade cache refreshing method, system, and device. The method in an embodiment of the present specification includes: determining a cache refreshing sequence based on a dependency relationship between caches in a cascade cache; and sequentially determining, based on the cache refreshing sequence, whether the caches in the cascade cache need to be refreshed, and refreshing a cache that needs to be refreshed, where when it is determined that a current cache needs to be refreshed, it is determined whether a cache following the current cache in the cache refreshing sequence needs to be refreshed after the current cache is refreshed.