Linux Plumbers Conf 2009

This talk gives an overview of the new core V4L2 framework that was created in the past year, and the future developments planned for this framework.

This talk will discuss problems faced by designers of multicore systems with multiple kernels, with an emphasis on solutions across developer communities.

It is compelling to integrate complex embedded systems with Linux USB userspace code. However, the complexity of userspace interface adds significant risk to the development cycle. Integrating a USB2.0 Isochronous mode ARM embedded system with Linux host software presents an end to end design challenge requiring not just a view of Linux from the 'inside' but also from the 'outside'. Some of the challenges Linux added to an already complex embedded system development will be presented, with some ideas to reduce the barries to entry and learning curve for embedded systems and host communication.

Requirements and challenges in implementation of Checkpoint/ Restart in Linux mainline.

Session to discuss and debate shared memory IPC in AMP systems. We will discuss the services desired, the implementation options, working with non-Linux OS instances, and whether or not it is even feasible to implement a common set of shared memory IPC tools

The networking world in Linux has undergone some significant changes in the past two years. With the expansion of multiqueue networking, coupled with the growing abundance of multi-core computers with 10 Gigabit ethernet, the concept of efficiently converging different network flows becomes a real possibility.

We take an in-depth look at two kinds of startup procedures: the initramfs system, and the process of loading and executing ELF binaries.

Introduction of a new initramfs generation tool, which creates a general purpose udev event based initramfs.

This talk addresses relationship between embedded developers and the Linux community

e-Paper Development, Progress and Problems

Discussing limitations of current userspace storage APIs for use in QEMU/KVM.

With stabilisation for a 2.0 release almost complete, the FFADO project (www.ffado.org) is looking to solve the timing difficulties it has faced using a new kernel-based helper module.

Discussing present and future git bisect features and how they can help application and kernel users and developers.

Session to discuss the work required to make the Flattened Device Tree method of describing hardware available to all architectures.

This talk is about decoupling package management systems from build environments, making the decisions "what to build" and "how to build" orthogonal.

This talk will detail issues with Linux and large NUMA factor/COMA architectures.

Kernel Development and Testing with Autotest

A description of a KVM port to PowerPC 970 cores, also known as PowerPC64

The moral of the story is, we still load too much stuff, and it takes too long to do it. Users (and developers) want time to go down, while things continue to get more complicated. How can we sort that out?

The Oregon State Wireless Active Learning Device (OSWALD) is an open, fully featured Ultra-Mobile Personal Computer (UMPC) platform designed by and for students. Come learn about the design, the software hacks, and issues in getting Linux to run smoothly on a custom made hand-held platform.

Last years libv4l2 presentation ended with a slide future with bullet points of features to be added, so where we stand today? And what will happen in the coming year?

This presentation aims at sharing lessons learned with the Linux audio stack (gstreamer, PulseAudio, ALSA) on recent consumer and mobile Intel devices.

Data de-duplication is a effective way to reduce large storage needs by eliminating redundant data, a hot demanded feature for virtualization OS image sharing and efficient data storage backups. It's really valuable to add data de-duplication support to Linux filesystem, however the feature is quite challenging too. How to get it right? What's the performance impact? Block level or file level? On the fly data de-duplication in filesystem or background userspace de-duplication?

This presentation addresses ways that developers can overcome development challenges, including using a Linux distribution that is tailored closely to their chosen hardware to help maintain the quality, control and consistency required to deliver commercial-ready devices to market faster.

open discussion on locking issue on clustering file systems, especially associated with fs/dlm code

The network layer can accomplish some amazing feats with the rarely used multicast features in the Linux kernel. Not only is it possible to send a single message to multiple recipients but the network is also dynamically reconfiguring itself to provide for your communication needs using IGMP. Some degree of independence from the IP addresses of the machines in the network can be accomplished. The network state becomes important and one does not communicate with hosts but with communication channels that every host can tie into. The network develops an intelligence in itself. It can discover new services, fall back dynamically and trigger actions on multiple hosts in a single message. All of these feats occur with a much higher speed than TCP.

A discussion on how to manage KVM guests using CIM.

Explain the current state of kgdb, kdb. Discuss the future architectural plans for combining kgdb, kdb and kernel mode settings and proposed advanced single stepping APIs.

This talk will focus on some of the challenges in migrating data from old, potentially failing hardware to new hardware: dealing quickly with IO errors, how to optimize the list of files to move and suggestions about how to handle failures during migration.

Running KVM in KVM, Xen in KVM, Hyper-V in KVM, ...

Network devices have but a single name, and for systems with > 1 NIC, it's probably wrong. Let's fix that.

oFono telephony stack

We aim to inform you about the archive formats you use every day. We will include an in-depth look at the tar, ar, cpio, gzip, bzip2, and deb formats, as well as the internals of the Git object store. Armed with this information, we will show you a practical application: removing the redundancy between files in version control and distributions of source and binaries.

The Linux audio environment is a mess. Everybody who develops Linux audio software knows this; anybody who uses anything more than basic desktop playback applications (and maybe even just that) knows this too. How did things get to be this way? Can it be solved? What is required to solve it? This talk will be less of a presentation of novel technical material and will instead focus more on the differences (and similarities) between Linux, OS X and Windows and how this has affected the audio environment on each platform.

The Out of Memory (OOM) killer has consistently been a hotly debated topic in Linux. Why does it kill? What is being done to improve it? What do users really need it to do?

Per backing device dirty data writeback replaces pdflush driven writeback in an attempt to speed up this operation.

The perfcounters infrastructures is fast moving into being the unifying channel for hw and software performance analisys

A case study of the Portland Oregon Regional Transportation Archive Listing (PORTAL) database on PostgreSQL and Linux.

Implementing power management is the job of the kernel - however, it's userspace's job to let it know what functionality is needed. What interfaces do we need to expose, and how should userspace be making use of them?

This presentation gives an example how to integrate complex audio enhancement algorithms like acoustic echo canceler to Pulseaudio and how to implement really low audio latency applications as PA modules.

The Proportional IO controller allows to distribute disk time to tasks/cgroups in proportion to their assigned weights. It leverages existing cgroup infrastructure for task grouping and supports specification of weights hierarchically.

A walk through the pieces of a modern Linux desktop, which manage the hardware that is coming and going and failing.

It is a solution to enable remote video acceleration on libVA for X-Window. It adds remote playback feature for libVA but does not require video-decoding capability on the client side.

Aside from the internals of Linux Plumbing, some of the largest and most intricate examples of how Linux is plumbed is the variety of ways in which modern enterprise leverages Linux. One of the major issues affecting System Administrators and CIOs is how to appropriately manage legacy environments. Often systems reach the point where they have increasing TCO as vendors no longer supply security fixes and it becomes increasingly difficult to use current versions of our management tools. A number of the major linux distributions are now starting to twilight early enterprise distributions which still count for many thousands of Linux installs within businesses of every scale.

Routing performance is often used as a gauge of performance when evaluating a system. I will discuss some of the problems and solutions we found when trying to route line rate bi-directional traffic using off the shelf hardware.

I present a new algorithm for scalable concurrent hash tables, performance results for this algorithm (2-10x more scalable than Linux), and potential applications.

Fine grained locking to improve scalability of the Linux VFS

Is it time to update or remove schedstats?

Shatter is a proposed upgrade to EXA that eliminates Virtual screen sizes and scanout/rendering limits.

The objective of this talk is to define common guidelines for security testing on Linux, sharing our concern about software security and the importance of software security testing as part of the development process.

What happened in the last year in Linux audio?

Increasing networking performance by using threaded interrupts for the network devices.

Discusses pro and cons of a unified mechanism to report platform errors.

Co-conspirators Jamey Sharp and Josh Triplett get up to a lot of miscellaneous hacking mischief together. Much of this hacking occurs while staring at the same screen, and tag-teaming the keyboard. Sometimes this happens with the two of them in different places. Learn how we manage this and why it's awesome.

Presenting Upstart 1.0

USB 3.0 promises a faster, more power efficient common device bus. Is Linux ready for it?

What can the Userspace RCU LGPL library do to help your application scale well on large multiprocessor systems ?

Video API Deathmatch: VDPAU vs. VAAPI

Video devices currently can only be open by one process at a time. This makes it impossible to do necessary things like software auto-focus or recording video while using ekiga.