Linux Plumbers Conf 2011

Identifying and eliminating the effects of bufferbloat

Can TCP Congestion control help with fairness and latency (bufferbloat)?

Byte queue limits are a mechanism to limit NIC HW queues by number of bytes as opposed to number of packets, thus reducing buffer bloat problem caused by these queues.

Advancements in NIC hardware and functionality, as well as things like increasing core counts on systems present new opportunities for taking networking performance to next level.

Data exchange during TCP handshake

A smooth and robust loss recovery for TCP

Status update on Beating the (buffer) bloat.

A look at scaling issues found and addressed in the igb and ixgbe drivers, and steps we are exploring to further improve performance.

How should thermal management for ARM devices be done within existing thermal constructs (hwmon and thermal framework)

Learn how QML make developings and deploying mobile appliances easy (and fun) on Symbian and MeeGo.

Adapting and extending the kernel dmaengine API for high-end dma controllers like EDMA found on Texas Instruments DaVinci devices and SDMA found on OMAP devices.

An overview of what is involved in making video calls and the issues typically encountered on mobile platforms.

The Cloud Track focuses on the underlying design methodologies, development tools, and emerging best practices around Linux and Open Source in Public and Private Clouds

cloud-init

In this presentation, we discuss the set of design and implementation
details that play into developing a Linux-based, open-source, large scale,
infrastructure level distributed system that implements a private cloud
computing platform.

A look at the problems related to latency in server workloads and solutions we are exploring to improve average and tail latencies.

Ensemble is a new opensource configuration management and tool for deploying services into a cloud and data center environments

Remus is a HA system for Xen VMs that preserves complete
Guest OS runtime state (including network connections) upon failover.

Finding and burying Configuration Defects in Linux with the undertaker

Tools to aid in the development of Linux code

A characteristic study on ad hoc synchronization in software systems and a tool called SyncFinder to automatically identify and annotate them.

Discussion on how to automatically diagnose firmware issue that can affect Linux.

An introduction to the Smatch static checker and a look at the future.

An overview and update on the Patchwork patch-tracking system.

Codemap is a semantic source code visualizer helping to navigate, visualize and search a large codebase using ideas similar to google maps.

Improving reliability of Linux device drivers against hardware failures and hardware specification bugs

You already use version control for your software, but what about your build dependencies and your system infrastructures? Come hear about Apters, our solution for reproducible builds and infrastructures.

A check-point of the Linaro-driven approach to addressing the memory management issues encountered by the ARM ecosystem.

The Unified Buffer Management microconference will use a free-form agenda, with time blocked out as shown below

Session lead for Virtualization micro conf

How can we reintroduce the zero-copy behaviour that was removed as
part of the process of upstreaming Xen’s netback driver

How does Virtio compare with traditional Xen PV drivers?

Yabusame is yet another live migration mechanism for Qemu/KVM, which implements the migration technique known as “postcopy” or “lazy” migration.

VFIO allows exporting PCI devices to userspace drivers. Discussion of using this interface for assigning physical devices to virtual machines and obstacles remaining for integration.

Folproof filesystem freeze API for user space daemons and guest agents.

Kernel cgroups are not sufficient for our containment needs.

Using hierarchical cgroups to manage shared resources.

Efficient utilization by overcommitment.

Add dcache accounting/limiting to the kernel

Proposed improvements to cgroups memory controller

Checkpoint/restart in the userspace

Container in a file (loopback-like block device)

An in-container view of /proc fs

Container enter functionality

Alternative LXC user-space implementation

Extending CPU accounting stats

How the kernel can help user space make best use of hardware for multimedia acceleration.

Building an efficient and maintenable API for allowing userspace to program GPU is one of the most important piece of the graphic stacks

This presentation will introduce multi-plane HW solution and provide one software solution to make good use of multi-plane and enable translucency.

OpenGL (and friends) in the Future: A notional view of what may happen in the land of graphics APIs.

Discussion of Linux idle power management vs other OSes

PM Development in The Linux Kernel Since August 2010

How can we optimise the power management of an entire system?

Scaling Linux, both up and down

Presentation of the Userspace RCU library features.

Scalability problems in/caused by fork

Greatly simplifying, securing, improving our traditional filesystem layout without causing major breakage

systemd was first announced a year ago and has since become an integral part of various Linux distributions, including Fedora 15.

A proposal for an EFI like boot mechanism with a dracut initramfs and the linux kernel using kexec to boot other linux kernels.

lightning fast booting on x86 / x64 platforms

Linker, compiler, runtime linker and the kernel can be improved to start applications significantly faster

Tracing

Can the “trace” utility merge perf and ftrace.

Presentation of the new LTTng 2.0 kernel and userspace tracer.

Tracing the Guest from the Host, a discussion

This is a talk about the various changes we made to PulseAudio and GStreamer to support passthrough output for compressed audio formats and how applications can make use of this.

This talk will present the features Linux is missing to comply with the current AVRCP spec, and a proposal of how to achieve fully compliance.

Status update and discussion on future directions for the control of DSP features on

The new streaming interface proposal provides a framework in sound subsystem to support offloaded decoders and encoders

The session will detail a design and progress towards getting a unified way to manage common features like snapshots, growth, shrinking for file systems and files.

Linux FedFS implementation needs help defining its user interfaces

The verity target provides transparent integrity checking of block devices using a cryptographic digest.

This presentation will propose interfaces to expose DCB attributes to MPIO, virtualization, and other applications consistently regardless of underlying device type.