<item source="bsdcan" added="20120530">

	    <title>BSDCan-2012 - Michael Dexter - An applied survey of BSD multiplicity and virtualization strategies from chroot to BHyVe</title>

		<desc>

		Ever since the University of California, Berkeley CSRG

		implemented the chroot(8) command and system call in its

		BSD operating system in 1982, the community-developed 

		BSD Unix derivatives have set the standard for

		the introduction of plurality to the conventionally-singular

		Unix computing model. Today's system operators and developers

		have an array of BSD-licensed multiplicity strategies at their

		disposal that offer various degrees of both isolation and 

		virtualization when introducing plurality. This paper will

		survey current and experimental BSD multiplicity strategies

		including chroot, FreeBSD jail, NetBSD/Xen, Amazon EC2,

		compatlinux, GXemul and SIMH, plus experimental strategies

		such as FreeBSD BHyVe, compatmach, Usermode NetBSD,

		Dragonfly BSD vkernel, OpenBSD sysjail and NetBSD mult.

		As an applied survey, this paper will both categorize each

		multiplicity strategy by the Unix environment to which

		it introduces plurality and demonstrate the usage

		of the utilities relating to each solution.

		</desc>

	    <overview>http://www.bsdcan.org/2012/schedule/events/291en.html</overview>

	    <tags>2012,bsdcan,bsdcan2012,papers,michael dexter</tags>

	    <files>

		<file>

		    <url>http://www.bsdcan.org/2011/schedule/events/291en.html</url>

		    <desc>html</desc>

		    <tags>html</tags>

		</file>

	    </files>

	</item>

	<item source="bsdcan" added="20120530">

	    <title>BSDCan-2012 - Kirk McKusick - An Overview of Locking in the FreeBSD Kernel</title>

		<desc>

		The FreeBSD kernel uses seven different types of locks

		to ensure proper access to the resources that it manages.

		This talk describes the hierarchy of these locks from

		the low-level and simple to the high-level and full-featured.

		The functionality of each type of lock is described along

		with the problem domain for which it is intended. 

		The talk concludes by describing the witness system

		within the FreeBSD kernel that tracks the usage of all

		the locks in the system and reports any possible deadlocks

		that might occur because of improper acquisition ordering

		of locks.

		</desc>

	    <overview>http://www.bsdcan.org/2012/schedule/events/306en.html</overview>

	    <tags>2012,bsdcan,bsdcan2012,papers,kirk mckusick</tags>

	    <files>

		<file>

		    <url>http://www.bsdcan.org/2012/schedule/attachments/195_locking.pdf</url>

		    <size>27 Kb</size>

		    <desc>Slides</desc>

		    <tags>pdf</tags>

		</file>

	    </files>

	</item>

	<item source="bsdcan" added="20100520">

	    <title>BSDCan-2010 - Kris Moore - The PBI format re-implemented for FreeBSD and PC-BSD</title>

		<desc>

		The PBI format (Push Button Installer) has been the default

		package management system for PC-BSD going on 5+ years now.

		However as we looked to the future it became apparent that it

		was greatly needing an overhaul to both improve its

		functionality, and expand its usage outside the scope of

		just PC-BSD. Among the areas needing improvement were how

		it dealt with identical libraries between applications,

		the heavy requirements from being implemented in QT/KDE,

		and lack of a digital verification mechanism.

		</desc>

	    <overview>http://www.bsdcan.org/2011/schedule/events/215en.html</overview>

	    <tags>2010,bsdcan,bsdcan2010,papers,kris moore</tags>

	    <files>

		<file>

		    <url>http://www.bsdcan.org/2011/schedule/events/215en.html</url>

		    <desc>html</desc>

		    <tags>html</tags>

		</file>

	    </files>

	</item>