Initial commit

Add FreeBSD slides.

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+\documentclass[handout]{beamer}
+\usepackage[utf8]{inputenc}
+\usepackage[english]{babel}
+\usepackage{graphicx}
+\usepackage{caption}
+\usepackage{textpos}
+%\usepackage{booktabs}% http://ctan.org/pkg/booktabs
+\usepackage{xparse}% http://ctan.org/pkg/xparse
+\usepackage{array}
+\usepackage{tabu}
+\usepackage{color,colortbl}
+\usepackage{hhline}
+\usepackage{hyperref}
+%\usepackage{color}
+%\usepackage[table]{xcolor}
+
+% Rotation: \rot[<angle>][<width>]{<stuff>}
+\NewDocumentCommand{\rot}{O{45} O{1em} m}{\makebox[#2][l]{\rotatebox{#1}{#3}}}
+\newcommand{\specialcell}[2][c]{%
+  \begin{tabular}[#1]{@{}c@{}}#2\end{tabular}}
+
+\newcommand{\brev}[1]{\href{https://svnweb.freebsd.org/changeset/base/#1}{r#1}}
+\newcommand{\prev}[1]{\href{https://svnweb.freebsd.org/changeset/ports/#1}{r#1}}
+
+\let\Tiny=\tiny
+\usepackage{theme/xentalk}
+
+\setbeameroption{hide notes}
+%\setbeameroption{show notes}
+\setbeamerfont{note page}{size=\scriptsize}
+% Class options include: notes, notesonly, handout, trans,
+%                        hidesubsections, shadesubsections,
+%                        inrow, blue, red, grey, brown
+\author[Wei Liu and Roger Pau]{Wei Liu {\small wei.liu2@citrix.com}\\Roger Pau Monné {\small roger.pau@citrix.com}}
+\title{FreeBSD/Xen update}
+\date{Brussels -- 31st of January, 2016}
+
+\begin{document} {
+\setbeamertemplate{footline}{}
+\setbeamertemplate{headline}{}
+
+% Title Frame
+\begin{frame}
+    \begin{textblock*}{100mm}(.92\textwidth,8cm)
+        \includegraphics[height=0.6cm]{theme/xen_project_logo.png}
+    \end{textblock*}
+    %\begin{textblock*}{100mm}(0.73\textwidth,3.4cm)
+    %    \includegraphics[height=4.5cm]{daemon_hammer.jpg}
+    %\end{textblock*}
+    \titlepage
+\end{frame}
+\note{Welcome}}
+
+\section{Xen Architecture}
+
+\subsection{arch}
+
+\begin{frame}
+    \frametitle{Xen Architecture (type-1 hypervisor)}
+    \begin{center}
+        \includegraphics[width=0.66\textwidth]{xen_arch.pdf}
+    \end{center}
+\end{frame}
+\note{
+    \begin{itemize}
+        \item Type 1 Hypervisor with a twist
+        \item Xen run on bare metal, and only has the MMU, IOMMU and scheduler
+        \item Device drivers are provided by the control domain
+        \item Allows to reuse device drivers already present in OSes
+        \item Control domain can only be Linux or NetBSD (requires PV guest)
+        \item PV guests also can only be NetBSD, or Linux
+        \item HVM guests can be any OS (Windows, OpenBSD...)
+        \item Now we are going to see all this kinds of guests in more detail
+    \end{itemize}
+}
+
+\begin{frame}
+    \frametitle{Type-2 hypervisor architecture}
+    \begin{center}
+        \includegraphics[width=0.77\textwidth]{kvm_arch.pdf}
+    \end{center}
+\end{frame}
+\note{
+    \begin{itemize}
+        \item none
+    \end{itemize}
+}
+
+\begin{frame}
+    \frametitle{Xen architecture in detail}
+    \begin{center}
+        \includegraphics[width=0.87\textwidth]{xen_arch_ex.pdf}
+    \end{center}
+\end{frame}
+\note{
+    \begin{itemize}
+        \item none
+    \end{itemize}
+}
+
+\section{News from FreeBSD}
+
+\subsection{fbsd_up}
+
+\begin{frame}
+    \frametitle{xen-block related improvements}
+    \begin{itemize}
+        \item Remove broken block protocol extensions (\brev{284296}).
+        \item Unmapped IO support for blkfront (\brev{290611}).
+        \item Indirect descriptors support, by Colin Percival (\brev{286062}).
+    \end{itemize}
+\end{frame}
+\note{
+    \begin{itemize}
+        % broken block-extension.
+        \item Prevented FreeBSD 32bit guests from working on a FreeBSD 64bit Dom0.
+        \item Allows cleanup of public block headers which had pollution from this FreeBSD specific extension.
+        % Unammped IO.
+        \item Unmapped IO support for blkfront required changes to busdma, that's why it was not done earlier.
+        \item With unmapped IO we should prevent TLB flushes, which cause delays on big systems since each vCPU needs to be woken up in order to perform the flush.
+        % Indirect descriptors
+        \item Allow increasing the request size from 44KB to 2MB.
+        \item From FreeBSD's point of view, it allows increasing the request size to 128KB (MAXPHYS).
+    \end{itemize}
+}
+
+\begin{frame}
+    \frametitle{Dom0 improvements}
+    \begin{itemize}
+        \item Multiple fixes for the multiboot support in the loader (\brev{277291}, \brev{277418}, \brev{280953}, \brev{280954}).
+        \item Improved PIRQ handling (\brev{278854}, \brev{278855}).
+        \item Indirect descriptors support, by Colin Percival (\brev{286062}).
+        \item Improvements to foreign memory mapping (\brev{282634}).
+        \item Added save, restore and live migration support to the Xen package (\prev{398918}).
+    \end{itemize}
+\end{frame}
+\note{
+    \begin{itemize}
+        % multiboot.
+        \item Should make the multiboot-loader much resistant to errors and should run on all hardware.
+        % PIRQ.
+        \item Differentiate between edge and level PIRQS.
+        \item Pre-register legacy IRQs (<16).
+        % Foreign memory
+        \item Make sure that where foreign memory is mapped doesn't clash with a MMIO region.
+    \end{itemize}
+}
+
+\begin{frame}
+    \frametitle{EC2 specific improvements}
+    \begin{itemize}
+        \item Allow creating EC2 AMIs from the FreeBSD build system (\brev{280928}) by Colin Percival.
+        \item Support for SR-IOV (A.K.A EC2 Enhanced Networking) for FreeBSD guests.
+    \end{itemize}
+\end{frame}
+\note{
+    \begin{itemize}
+        % EC2 images.
+        \item Provides and easy way to build images and customize them.
+        % SR-IOV.
+        \item Allow pci passthrough of virtual functions of a PCIe card. From a guest PoV it's like a physical network adaptor, although the underlying hw is shared with other guests. Should provide the fastest networking possible.
+    \end{itemize}
+}
+
+\begin{frame}
+    \frametitle{Generic fixes and improvements}
+    \begin{itemize}
+        \item Xenstore device fixes (\brev{278844}).
+        \item Add a handler for the debug interrupt (\brev{280838}).
+        \item Update Xen headers to 4.6, previous version was 4.2 (\brev{288917}) by Julien Grall.
+        \item Cleanup and unification of Xen files (\brev{289685}, \brev{289686}) by Julien Grall.
+        \item New PV console driver (\brev{289033}) by Julien Grall.
+        \item Add run-time options to disable PV devices (\brev{286999}).
+        \item Removal of the i386 UP PV port (\brev{282274}) by John Baldwin.
+    \end{itemize}
+\end{frame}
+\note{
+    \begin{itemize}
+        % Xenstore.
+        \item Allow multiple concurrent clients.
+        \item Free client data on close.
+        % Debug interrupt.
+        \item Xen can send a debug signal to a guest, which should trigger a stack-trce print on the Xen console. This is useful for developers as well a troubleshooting user issues.
+        % Headers
+        \item New headers are required in order to use new features found on newer Xen versions.
+        \item The cleanup allowed to unify a lot of the i386/amd64 headers, and to remove some leftovers from the i386 PV port.
+        % Console
+        \item Complete re-write of the Xen console driver, previous code was very buggy and tended to write past the end of the shared ring, causing memory corruption and page faults.
+        % Disable PV drivers
+        \item Under some circumstances certain PV drivers didn't work as expected (PV nic + pf), so an option has been provided in order to switch back to FreeBSD using the emulated devices. This is a run-time option that can be changed from loader.conf.
+        % PV port
+        \item The i386 Xen PV port was limited to a single vCPU, had bugs and was unmaintained.
+        \item The removal allows to cleanup both the i386 generic code and the Xen code and drivers, by completely removing any PV leftovers from FreeBSD source code.
+    \end{itemize}
+}
+
+\begin{frame}
+    \frametitle{xen-net related improvements}
+    \begin{itemize}
+        \item Fix initial ARP sending on restore from migration (\brev{282908}).
+        \item Preserve configured options across migrations (\brev{285098}).
+    \end{itemize}
+\end{frame}
+\note{
+    \begin{itemize}
+        % ARP.
+        \item It is important to send an ARP on restore from migration so the bridge can notice that a new MAC has been added.
+        \item FreeBSD used to send the ARP before waiting for the nic to become connected.
+        % Options.
+        \item Preserve user-selected nic options (TSO, LRO...) when possible across migrations.
+    \end{itemize}
+}
+
+\section{Live demo}
+
+\subsection{live}
+
+\begin{frame}
+    \frametitle{Live demo}
+    \begin{itemize}
+        \item Live demo of save/restore/live migration of a FreeBSD guest on a FreeBSD Dom0.
+    \end{itemize}
+\end{frame}
+\note{
+    \begin{itemize}
+        \item Should we do it? Is there anything else that we can demo?
+    \end{itemize}
+}
+
+\section{Q\&A}
+
+\subsection{QA}
+
+\begin{frame}
+    \frametitle{Q\&A}
+
+    \centering
+    {\huge
+    Thanks\\
+    \vspace{1em}
+    Questions?}\\
+    \vspace{2em}
+
+\end{frame}
+\note{
+
+}
+
+\end{document}

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