ICALEPCS2011 - List of Authors (Cota, E.G.)

Paper

Title

Page

Free and Open Source Software at CERN: Integration of Drivers in the Linux Kernel

1248

J.D. González Cobas, S. Iglesias Gonsálvez, J.H. Lewis, J. Serrano, M. Vanga
CERN, Geneva, Switzerland
E.G. Cota
Columbia University, NY, USA
A. Rubini, F. Vaga
University of Pavia, Pavia, Italy

We describe the experience acquired during the integration of the tsi148 driver into the main Linux kernel tree. The benefits (and some of the drawbacks) for long-term software maintenance are analysed, the most immediate one being the support and quality review added by an enormous community of skilled developers. Indirect consequences are also analysed, and these are no less important: a serious impact in the style of the development process, the use of cutting edge tools and technologies supporting development, the adoption of the very strict standards enforced by the Linux kernel community, etc. These elements were also exported to the hardware development process in our section and we will explain how they were used with a particular example in mind: the development of the FMC family of boards following the Open Hardware philosophy, and how its architecture must fit the Linux model. This delicate interplay of hardware and software architectures is a perfect showcase of the benefits we get from the strategic decision of having our drivers integrated in the kernel. Finally, the case for a whole family of CERN-developed drivers for data acquisition models, the prospects for its integration in the kernel, and the adoption of a model parallel to Comedi, is also taken as an example of how this model will perform in the future.

Slides THCHMUST04 [0.777 MB]

Paper	Title	Page
THCHMUST04	Free and Open Source Software at CERN: Integration of Drivers in the Linux Kernel	1248
	J.D. González Cobas, S. Iglesias Gonsálvez, J.H. Lewis, J. Serrano, M. Vanga CERN, Geneva, Switzerland E.G. Cota Columbia University, NY, USA A. Rubini, F. Vaga University of Pavia, Pavia, Italy
	We describe the experience acquired during the integration of the tsi148 driver into the main Linux kernel tree. The benefits (and some of the drawbacks) for long-term software maintenance are analysed, the most immediate one being the support and quality review added by an enormous community of skilled developers. Indirect consequences are also analysed, and these are no less important: a serious impact in the style of the development process, the use of cutting edge tools and technologies supporting development, the adoption of the very strict standards enforced by the Linux kernel community, etc. These elements were also exported to the hardware development process in our section and we will explain how they were used with a particular example in mind: the development of the FMC family of boards following the Open Hardware philosophy, and how its architecture must fit the Linux model. This delicate interplay of hardware and software architectures is a perfect showcase of the benefits we get from the strategic decision of having our drivers integrated in the kernel. Finally, the case for a whole family of CERN-developed drivers for data acquisition models, the prospects for its integration in the kernel, and the adoption of a model parallel to Comedi, is also taken as an example of how this model will perform in the future.
	Slides THCHMUST04 [0.777 MB]