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Xen on ARM interrupt latency | Xen Project Blog
Xen on ARM meets these requirements in a few different ways. Firstly, Xen comes with a flexible scheduler architecture. Xen includes a set of virtual machine schedulers, including RTDS, a soft real-time scheduler, and ARINC653, a hard real-time scheduler. Users can pick the ones that perform best for their use-cases. However, if they really care about latency, the best option is to have no schedulers at all and use a static assignment for virtual cpus to physical cpus instead. There are no automatic ways to do that today, but it is quite easy to achieve with the vcpu-pin command:
xen  arm  latency  embedded  virtualization 
2 days ago by vielmetti
An Introduction to Qubes OS | Qubes OS
Qubes takes an approach called security by compartmentalization, which allows you to compartmentalize the various parts of your digital life into securely isolated compartments called qubes.

This approach allows you to keep the different things you do on your computer securely separated from each other in isolated qubes so that one qube getting compromised won’t affect the others. For example, you might have one qube for visiting untrusted websites and a different qube for doing online banking. This way, if your untrusted browsing qube gets compromised by a malware-laden website, your online banking activities won’t be at risk. Similarly, if you’re concerned about malicious email attachments, Qubes can make it so that every attachment gets opened in its own single-use disposable qube. In this way, Qubes allows you to do everything on the same physical computer without having to worry about a single successful cyberattack taking down your entire digital life in one fell swoop.

Moreover, all of these isolated qubes are integrated into a single, usable system. Programs are isolated in their own separate qubes, but all windows are displayed in a single, unified desktop environment with unforgeable colored window borders so that you can easily identify windows from different security levels. Common attack vectors like network cards and USB controllers are isolated in their own hardware qubes while their functionality is preserved through secure networking, firewalls, and USB device management. Integrated file and clipboard copy and paste operations make it easy to work across various qubes without compromising security. The innovative Template system separates software installation from software use, allowing qubes to share a root filesystem without sacrificing security (and saving disk space, to boot). Qubes even allows you to sanitize PDFs and images in a few clicks. Users concerned about privacy will appreciate the integration of Whonix with Qubes, which makes it easy to use Tor securely, while those concerned about physical hardware attacks will benefit from Anti Evil Maid.
security  privacy  linux  security_architecture  xen  virtualization  tool 
25 days ago by cdzombak
[Xen-devel] Critique of the Xen Security Process
Recently Xen has released the XSA-148 advisory addressing a fatal bug in the hypervisor. The bug has been lurking there for the last 7 years! We, the Qubes OS Project, have commented on this in our Security Bulletin #22. And far from enthusiastic commentary that was (FWIW, it was me who wrote this QSB, as evidenced in the commits log, in case some from the Xen community would like to direct their rage towards a particular human being ;) Ian Jackson then wrote a response on the Xen blog. I was then asked to share some more thoughts about how I thought Xen could actually improve its security process. So, I share some these below.
xen  security 
4 weeks ago by lehmannro
How to Add A USB Drive to Citrix XenServer as a Local SR (Storage Repository) | Citrix Blogs
xe sr-create host-uuid=" UUID OF YOUR SERVER" content-type=user name-label=" USB Drive" shared=false device-config:device=/dev/sdc type=lvm
xen  add  usb  drive  sr  storage  repository  citrix  xenserver 
5 weeks ago by Naelus
Citrix : XenServer Distributed Virtual Switch Controller - YouTube
More videos like this online at http://www.theurbanpenguin.com
In this video we configure the citrix distributed virtual switch controller on XenServer 6. We import version 6 of the switch and then upgrade to 6.02 with the nsf file.Once up and running we connect to the resource pool and then see the cross-server network operational.
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Johnny English
Johnny Englishvor 1 Jahr
Is there an easy way to get the vSwitch Controller?
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Eugene
Eugenevor 1 Jahr
Thanks! Very useful information.
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TheMeddevor 3 Jahren
What is the Xen Server Distributed Switch used for?
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XenServer 6 - Creating Virtual Networks with XenServer
Pluralsight IT - Training Archive
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10:34
XenServer distributed virtual switch-controller
Chaitanya Kumar Gutala
5.999 Aufrufe
XEN 
8 weeks ago by silvioberlin
XenServer | Open Source Server Virtualization
XenServer is the leading open source virtualization platform, powered by the Xen hypervisor. It is used in the world's largest clouds and enterprises.
by:argonaut  virtualization  linux  full  openxenserver  proxmox  vm  windows  XEN  xenserver 
december 2016 by otlib
Re: bpfjit and npf on Xen
Why so hard?

../../../../net/bpfjit.c:72:22: fatal error: sljitLir.h: No such file or directory
#include <sljitLir.h>
^
compilation terminated.
mkdep: compile failed.
*** Error code 1

Still can't even compile a kernel out of the box with NetBSD 7.0.2. Friggin pain in the arse.

---

pull up request here: https://mail-index.netbsd.org/tech-net/2016/09/15/msg006105.html

Merged in:

http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/xen/conf/files.xen?only_with_tag=MAIN

here:

http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/arch/xen/conf/files.xen?rev=1.135&content-type=text/x-cvsweb-markup&only_with_tag=MAIN

I think I'll just wait out 7.1 until I used npf on XEN.
netbsd  xen  npf 
december 2016 by atomicules
Open vSwitch
Open vSwitch is a production quality, multilayer virtual switch licensed under the open source Apache 2.0 license. 
vswitch  networking  virtualization  network  linux  switch  xen  opensource  cloud  kvm  openvswitch 
december 2016 by msurbey

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