In part three of an Embedded Linux Journal series of articles by Kevin Dankwardt on Real-time Linux, Dankwardt reviewed the sub-kernel approach as used in RTLinux and RTAI and provided some benchmark numbers. Following publication of Dankwardt's article, MontaVista Software's Kevin Morgan issued a “response” to Dankwardt's article in which he offered “a few clarifications (or points of view)”. Next, Victor Yodaiken and Matt Sherer (of FSMLabs) reacted to Kevin Morgan's response to Dankwardt's article, taking exception to Morgan's assertion that RTLinux is “not appropriate for the placement of comprehensive applications”.

In this latest installment of a continuing discussion on alternative approaches to achieving real-time performance in Linux, Kevin Morgan (of MontaVista) clarifies the status of MontaVista's kernel preemption enhancements and responds to several other issues raised in Yodaiken and Sherer's earlier comments.

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