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MontaVista Refreshes Carrier-Grade Linux


Update includes SELinux security, new monitoring and debug features

By P. J. Connolly
December 15, 2007 — 
To those who remember when Linux was strictly a hobbyist operating system, it’s nothing short of incredible that in less than a dozen years, it’s found not only in consumer devices such as TiVO, but at the most demanding levels of reliability in so-called “carrier grade” telecom equipment.

MontaVista Software refreshed its entry in the market, announcing MontaVista Linux Carrier Grade Edition (CGE) 5.0 on Nov. 14. The new release is scheduled for availability on Dec. 17 for Intel and PowerPC platforms, with MIPS support due in the first months of 2008. It can be used with network equipment from a list of providers, including Alcatel-Lucent, Iskratel, Motorola and NEC.

CGE 5.0 is built around the Linux 2.6.21 kernel and the Carrier Grade Linux 4.0 specification, and features a unique runtime patching technology that the company claims allows field engineers to apply binary patches to an active system, without requiring reboots or other downtime.

This release is the first carrier-grade operating system to include the NSA’s Security-Enhanced Linux (SELinux), according to MontaVista. SELinux focuses on role-based access control and works on an allow-deny basis with any component or object within a system. CGE 5.0 also includes the SLIDE integrated security policy development and deployment system, which plugs into MontaVista’s DevRocket IDE and allows graphical security policy configuration.

As well as the security plug-in, the DevRocket IDE receives new development and debugging components as part of the CGE 5.0 release, covering memory leak detection and usage analysis, performance profiling and system tracing. Also presented in the IDE is a live RSS feed from the company with product updates and defect resolutions.

New in this release too is the Flight Recorder, which acts like an airplane’s “black box” to track and log system history and behavior. Flight Recorder maintains a scheduler history that the company says provides more information than a simple crash dump, and can be extended for customized tracking and diagnostics.

The CGE update includes a refreshed MontaVista Field-Safe Application Debugger, designed to make it easier to use with live systems, without halting execution or taking the system offline. Live core dumps are also possible with CGE 5.0, halting an application for a small fraction of a second to snapshot memory. MontaVista claims this can be done with pauses of hundreds or even tens of milliseconds.

High-resolution process accounting is also available in CGE 5.0, allowing engineers to monitor and predict CPU loads, according to the company. So-called “microstate” accounting can improve network performance by allowing the design of effective load balancing and graceful protocol degradation schemes.


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