Language Selection

English French German Italian Portuguese Spanish

Live Patching on Linux

Filed under
Linux

To satisfy high-availability requirements, special-purpose operating systems, sometimes proprietary or self-developed operating system, were used in telecom systems. As the telecommunication world is now moving towards using the Linux operating system on mission-critical systems, new high requirements are imposed on the operating systems. However, Linux is designed to work best on desktop and enterprise systems, and it doesn't have the mechanisms and capabilities needed for mission-critical system with an intense and complex workload that must also handle very confidential information. The OSDL Carrier-Grade Linux (CGL) working group is looking at filling these gaps by creating the CGL requirement definition documents and supporting the creation of Open Source projects to fill these gaps.

Live patching is one of the capabilities in version 3.1 of the CGL requirement definition document released in June 2005. This feature enables a process to modify its functions without restarting, a very needed capability for telecommunication systems that are expected be continuously in service.

One approach to achieving live patching is overwriting the "jmp" assembly code to the entry point of function, which is the method applied by the PANNUS project. PANNUS enables the replacement of a function without restarting a process. This approach is very practical because many software programs are usually implemented with various functions.

Full Story.

More in Tux Machines

4MLinux 20.1 released.

This is a minor maintenance release in the 4MLinux STABLE channel. The release ships with the Linux kernel 4.4.34, which restores PAE support that "magically" disappeared in 4MLinux 20.0 (sorry :-). Additionally, some popular programs (Double Commander, Dropbox, Firefox, Java RE, Opera, PeaZip, Thunderbird, Wine) have been updated, too. Read more

Refracta 8.0 Is a Pint-Sized Powerhouse

Refracta is a somewhat obscure Linux distribution that offers exceptional functionality and stability. Obscurity is not always a bad thing when it comes to Linux distros. You can find some very worthwhile alternatives to your current operating system. Refracta is a big surprise in a small package. Many look-alike desktop distros are difficult to distinguish from run-of-the-mill garden varieties. Others offer new adopters something unique that makes using them fun and productive. Refracta is one of the few full-service Linux distros that makes an easy and more convenient replacement for pocket Linux options such as Puppy Linux. Not all Linux distros that install to a USB drive -- and have the ability to save files and system settings in a persistent mode -- work equally well. Read more

Clear Linux With Mesa 13 Is A Strong Match For Intel Linux Performance

When benchmarking Intel's Clear Linux distribution earlier this year we found its Intel graphics performance to be quite good and slightly faster than other Linux distributions even when Clear was using an older version of Mesa. Now with Clear Linux having switched to Mesa 13, I decided to run some fresh Intel OpenGL benchmarks on it compared to other distributions. Read more

PTS: PHP 7.1 vs. PHP 7.0 vs. HHVM Benchmarks

With today's PHP 7.1 release, performance isn't highlighted as much as language improvements to this first major update to PHP7, but I decided to run some PHP 7.1, PHP 7.0, PHP 5.6, PHP 5.5, and HHVM benchmarks of our open-source Phoronix Test Suite code-base. These self-tests of the Phoronix Test Suite aren't the conventional PHP workload of just a CMS, blog, or other web application that can be cached, etc, but effectively of a PHP CLI application. So keep this in mind when looking at the results and that your mileage may vary depending upon use-case. Read more