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Oracle® VM Server for SPARC 3.4 Administration Guide

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Updated: August 2016

Current Direct I/O Feature Limitations

For information about how to work around the limitations, see Planning PCIe Endpoint Device Configuration.

Assignment or removal of a PCIe endpoint device to any non-root domain is permitted only when that domain is either stopped or inactive.

Note - The Fujitsu M10 server supports the dynamic reconfiguration of PCIe endpoint devices. You can assign or remove PCIe endpoint devices without rebooting the root domain or stopping the I/O domain.

For up-to-date information about this feature, see Fujitsu M10/SPARC M10 Systems System Operation and Administration Guide for your model at http://www.fujitsu.com/global/services/computing/server/sparc/downloads/manual/.

Note - The direct I/O feature is not supported on the SPARC M7 series server, SPARC T7 series server, and SPARC S7 series server. Instead, use the PCIe bus assignment feature. See Creating a Root Domain by Assigning PCIe Buses.

SPARC systems, up to and including the SPARC T5 and SPARC M6 platforms, provide a finite number of interrupts, so Oracle Solaris limits the number of interrupts that each device can use. The default limit should match the needs of a typical system configuration but you might need to adjust this value for certain system configurations. For more information, see Adjusting the Interrupt Limit.