PCIe Link Reset to Minimize Workload Impact
AssigneeInternational Business Machines Corporation
InventorsCurtis S. Eide, Christopher J. Engel, Aditya Saripalli
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Abstract
An approach is provided in which an information handling system suspends operation of one or more components corresponding to a PCIe link that is operating at a reduced capacity. The information handling system then trains the PCIe link to an increased capacity while the one or more components are suspended in operation. In turn, the information handling system resumes operation of the one or more components and restores the PCIe link to the increased capacity.
Claims19
A method implemented by an information handling system that includes a memory and a processor, the method comprising:
- suspending operation of one or more components corresponding to a PCIe link that is operating at a reduced capacity, wherein the PCIe link interfaces a host system to a PCIe I/O expansion drawer;
- training the PCIe link to an increased capacity while the one or more components are suspended in operation;
- and
- restoring the PCIe link to the increased capacity subsequent to resuming operation of the one or more components.
An information handling system comprising:
- one or more processors;
- a memory coupled to at least one of the processors;
- a set of computer program instructions stored in the memory and executed by at least one of the processors in order to perform actions of:
- suspending operation of one or more components corresponding to a PCIe link that is operating at a reduced capacity, wherein the PCIe link interfaces a host system to a PCIe I/O expansion drawer;
- training the PCIe link to an increased capacity while the one or more components are suspended in operation;
- and
- restoring the PCIe link to the increased capacity subsequent to resuming operation of the one or more components.
A computer program product stored in a computer readable storage medium, comprising computer program code that, when executed by an information handling system, causes the information handling system to perform actions comprising:
- suspending operation of one or more components corresponding to a PCIe link that is operating at a reduced capacity, wherein the PCIe link interfaces a host system to a PCIe I/O expansion drawer;
- training the PCIe link to an increased capacity while the one or more components are suspended in operation;
- and
- restoring the PCIe link to the increased capacity subsequent to resuming operation of the one or more components.
Dependencies are inferred from the claim text.