BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Camel: Paravirtual memory CoW in Xen - Grzegorz Miłoś (Universit
 y of Cambridge)
DTSTART:20071206T163000Z
DTEND:20071206T173000Z
UID:TALK8485@talks.cam.ac.uk
CONTACT:Eiko Yoneki
DESCRIPTION:In this talk I will present a memory Copy-on-Write mechanism d
 eveloped for Xen Virtual Machine Monitor. Memory CoW is widely recognised 
 to be an effective method of reducing memory pressure\, by eliminating dup
 licate memory pages. While CoW is extensively used in general purpose oper
 ating systems\, it's acceptance in virtualisation environments has been hi
 ndered by the semantic gap between hypervisor and the guest OSes. The adve
 nt of paravirtualisation\, however\, allows to exploit extra information d
 irectly available from the guests.\n\nThe discussion of the CoW mechanism 
 will focus on the following challenges:\n\n1. How to detect sharing opport
 unities efficiently?\n\n2. How to reduce the cost of CoW faults?\n\n3. How
  to manage the excess memory obtained when sharing pages\, and how to asyn
 chronously reclaim memory from the guests?\n\nNo detailed knowledge of Xen
 /Xenolinux memory managed is required. The talk will be summarised with a 
 status report.\n
LOCATION:Lecture Theatre 2\, Computer Laboratory\, William Gates Builiding
END:VEVENT
END:VCALENDAR