Improving integration of LDoms and FMA

Scott Davenport recently posted a blog entry announcing the availability of Solaris 10 Update 7 (aka Solaris 10 5/09 or just s10u7), and touted some of the FMA improvements in the release. Of particular interest for LDoms and its users are improvements in diagnosis of IO faults when one or more IO root complexes are allocated to domains other than the control domain (i.e. so-called root domains). These improvements were designed & developed through a collaborative effort between the LDoms & FMA teams. The collaboration between these teams is nothing new; even before the initial release of Logical Domains technology in April 2007, as well as ever since, there has been tight coordination between LDoms and FMA, both in terms of the technology, and the teams.

The changes needed to resolve the IO diagnosis problems required new interfaces between the FMA and LDoms code, as well as new software on both sides of the interface. As Scott mentioned, the FMA software is now available in the Solaris 10 5/09 release. However, the necessary changes on the LDoms side (in the LDoms Manager) will be available in the upcoming 1.2 release of Logical Domains, currently scheduled for this summer. That's no reason not to install s10u7 in a Logical Domains environment now; all currently supported versions of LDoms will function correctly with s10u7 installed in a control domain, guest domains, or both. And once LDoms 1.2 is released, simply installing the new firmware & LDoms Manager that make up the 1.2 update on a system running s10u7 will automatically enable the improved IO diagnosis features (along with several other new LDoms features, but that's the subject of another post).

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I work on the Oracle VM Server for SPARC (nee LDoms) team.

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