Abstract: Managing a virtual computer resource on at least one virtual machine. The managing of the virtual computer resource on the at least one virtual machine is by controlling execution of the virtual computer resource on the at least one virtual machine by a virtual machine instance, such as a firmware facility, of a trusted part of a computer system. The virtual machine instance is unique in the computer system.

Abstract: A computer-implemented method, for booting a computer system, that provides a list with entries of startup processes. Each startup process defines a resource of the computer system. For each startup process a requirement is defined. The method further comprises fetching one of the entries of the list with entries of startup processes; determining whether the requirement is satisfied for the one of the entries of the list with entries of startup processes; fetching, in case the requirement is not fulfilled, a next one of the entries of the list with entries of startup processes; starting, in case the required resource is fulfilled, the startup process; and repeating the fetching a next one of the entries, the determining and the starting until all startup processes of the list of startup processes have been started.

Abstract: A method is provided for suspending and resuming virtual machines in a network in dependence of network activity. The method includes providing a virtual machine manager. The virtual machine manager monitors network traffic of the virtual machines on a network bridge in a network layer using data packet analysis to detect dedicated network protocol traffic. More particularly, the monitoring of network traffic of the virtual machines may include: logging network addresses of the virtual machines of the network; combining logged network addresses with information about suspending or resuming virtual machines based on filtering rules being provided for such combination; and sending information about the network addresses of active and suspended virtual machines for virtual network adapters assigned to the virtual machines to the virtual machine manager.

Abstract: A method for updating software in a computer system, comprising at least a central processor and multiple adapter cards, wherein the adapter cards are attached to a network, the method comprising (i) the central processor generating a distribution map based on configuration data of the network (100); (ii) the central processor sending the software update data and the distribution map to a receiving adapter card of the adapter cards; (iii) in response to receiving the software update data and the distribution map, the receiving adapter card applying the received software update data and creating at least one modified distribution map.

Abstract: Integrating a further communication bridge into a running data processing system. The data processing system includes a communication client running a first operating system having no own communication stack and at least a first communication bridge running a second operating system having an own communication stack. The first communication bridge is configured as a master communication bridge. The further communication bridge announces itself as a slave communication bridge at an announcement time. The master communication bridge executes a quiesce process on the network adapter and on the API of the communication client when there are no data packets in the queue with a sending time earlier than the announcement time. The master communication bridge extracts the state of its communication stack and sends it to the further communication bridge. The master communication bridge resumes the network adapter and the API.

Abstract: Techniques are disclosed for concurrently loading a plurality of new modules while code of a plurality of modules of an original computer program is loaded and executed on a computer system. An associated method may include allocating a module thread local storage (TLS) block for each thread within an initial computer program, wherein the allocated module TLS blocks are large enough to hold all module thread variables that are loaded or to be loaded. The method further may include reserving spare areas between the module TLS blocks for adding new module thread variables and arranging at an end of the module TLS blocks a thread data template section for resetting threads or creating new threads. The method may result in addition of modules to the original computer program and/or application of a concurrent patch through replacement of one or more of the plurality of original computer program modules.

Abstract: A method is provided for suspending and resuming virtual machines in a network in dependence of network activity. The method includes providing a virtual machine manager. The virtual machine manager monitors network traffic of the virtual machines on a network bridge in a network layer using data packet analysis to detect dedicated network protocol traffic. More particularly, the monitoring of network traffic of the virtual machines may include: logging network addresses of the virtual machines of the network; combining logged network addresses with information about suspending or resuming virtual machines based on filtering rules being provided for such combination; and sending information about the network addresses of active and suspended virtual machines for virtual network adapters assigned to the virtual machines to the virtual machine manager.

Abstract: Stateful network connections between a first virtual machine and at least a second virtual machine are preserved during a suspend and resume cycle. The virtual machines are interconnected by a network. A control instance is provided to manage a routing of network traffic of the virtual machines to the network. In case of a suspend operation, the control instance tracks network addresses of each virtual machine, whereas in case of a resume operation, the control instance sets up a router for each virtual machine and requests new network addresses for each router. The control instance configures a network address translation on the router assigned to each virtual machine to map the new network addresses to the network addresses used before suspending the virtual machines.

Abstract: As the file system of an operating system program might be damaged by a crash, the file system is usually used neither for the selection of data to be dumped from a memory nor for the analysis of the dumped data, and all data contained in one or several areas of the memory are dumped. In order to preserve the integrity of the file system and enable its use after the crash, the memory is divided into a primary and a secondary memory section during a memory setup, file system data are transferred from the primary memory section to the secondary memory section widely out of the control of the operating system program, and a read access of a dump program is directed to the secondary memory section in order to select file system data to be dumped after the crash using error data.

Abstract: Securely removing system capabilities, being available to at least one logical partition, from that partition, the partition being hosted by a computer system running an operating system. The system capabilities are available to a boot loader of the computer system, wherein the boot loader is started in the logical partition. The logical partition remains activated while removing the system capabilities. A removal request is initiated by the boot loader; and a deconfigure command is performed by the boot loader.

Abstract: Methods and systems for executing dumping of main memory content and CPU states and for an adaptive boot. The methods and the systems provide a configuration list of the computer system comprising a pre-defined set of dedicated resources for the dumping, provide threshold values for a pre-defined set of minimum resources for executing a reboot of the computer system, assign the pre-defined set of the dedicated resources for executing the dumping, start the dumping, release ones of the dedicated resources after content of the ones of the dedicated resources has been dumped, start a reboot process of the computer system in response to determining that the ones of the dedicated resources exceeds the threshold values for the pre-defined set of the minimum resources for executing the reboot process, and continue to release others of the dedicated resources to the reboot process until the dumping is completed.

Abstract: Methods and systems for executing dumping of main memory content and CPU states and for an adaptive boot. The methods and the systems provide a configuration list of the computer system comprising a pre-defined set of dedicated resources for the dumping, provide threshold values for a pre-defined set of minimum resources for executing a reboot of the computer system, assign the pre-defined set of the dedicated resources for executing the dumping, start the dumping, release ones of the dedicated resources after content of the ones of the dedicated resources has been dumped, start a reboot process of the computer system in response to determining that the ones of the dedicated resources exceeds the threshold values for the pre-defined set of the minimum resources for executing the reboot process, and continue to release others of the dedicated resources to the reboot process until the dumping is completed.

Abstract: Technology for decrypting and using a security module in a processor cache in a secure mode such that dynamic address translation prevents access to portions of the volatile memory outside of a secret store in a volatile memory.

Abstract: Technology for decrypting and using a security module in a processor cache in a secure mode such that dynamic address translation prevents access to portions of the volatile memory outside of a secret store in a volatile memory.

Abstract: A computer-implemented method, for booting a computer system, that provides a list with entries of startup processes. Each startup process defines a resource of the computer system. For each startup process a requirement is defined. The method further comprises fetching one of the entries of the list with entries of startup processes; determining whether the requirement is satisfied for the one of the entries of the list with entries of startup processes; fetching, in case the requirement is not fulfilled, a next one of the entries of the list with entries of startup processes; starting, in case the required resource is fulfilled, the startup process; and repeating the fetching a next one of the entries, the determining and the starting until all startup processes of the list of startup processes have been started.

Abstract: A computer-implemented method, for booting a computer system, that provides a list with entries of startup processes. Each startup process defines a resource of the computer system. For each startup process a requirement is defined. The method further comprises fetching one of the entries of the list with entries of startup processes; determining whether the requirement is satisfied for the one of the entries of the list with entries of startup processes; fetching, in case the requirement is not fulfilled, a next one of the entries of the list with entries of startup processes; starting, in case the required resource is fulfilled, the startup process; and repeating the fetching a next one of the entries, the determining and the starting until all startup processes of the list of startup processes have been started.

Abstract: Generating a pool of random numbers for use by computer applications. Vibration sensors are placed throughout a machine and collects information theoretic entropy data from the measurement of the vibration sensors. The data is then filtered and added to an entropy pool. Applications needing a random number may acquire a number from the pool. A method, computer program product and system to generate the pool are provided.

Abstract: Integrating a further communication bridge into a running data processing system. The data processing system includes a communication client running a first operating system having no own communication stack and at least a first communication bridge running a second operating system having an own communication stack. The first communication bridge is configured as a master communication bridge. The further communication bridge announces itself as a slave communication bridge at an announcement time. The master communication bridge executes a quiesce process on the network adapter and on the API of the communication client when there are no data packets in the queue with a sending time earlier than the announcement time. The master communication bridge extracts the state of its communication stack and sends it to the further communication bridge. The master communication bridge resumes the network adapter and the API.

Abstract: An approach for simultaneous multithreading in a processor. The approach comprises measuring SMT-performance value of a software code and measuring non-SMT-performance value the software code, comparing the SMT-performance value with the non-SMT performance value and dispatching the software code for execution mode by the processor based on the comparison, wherein the execution mode comprises SMT-mode and non-SMT-mode of the processor.

Abstract: An approach for simultaneous multithreading in a processor. The approach comprises measuring SMT-performance value of a software code and measuring non-SMT-performance value the software code, comparing the SMT-performance value with the non-SMT performance value and dispatching the software code for execution mode by the processor based on the comparison, wherein the execution mode comprises SMT-mode and non-SMT-mode of the processor.