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RE: [Xen-users] Xen Documentation

To: "'Stephen Spector'" <stephen.spector@xxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] Xen Documentation
From: "Venefax" <venefax@xxxxxxxxx>
Date: Sat, 22 Nov 2008 00:28:26 -0500
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There is a huge bug in Xen that it is a pain in the neck to solve. In a production scenario, I set all DomUs to avoid using proc 0 (reserved for Dom0 exclusively). This is done, only, by using this trick


Xm list --long NameOfDomU > NameOfDomU.sxp


Edit NameOfDomu.sxp and add (cpus 1-X) after the vcpus line.


Xm del NameOfDomU


Xm new -F NameOfDomU.sxp


The problem is that if you reboot the server, and Xen brings up all the VM's listed in /etc/xen/auto, all this work is lost, it does not get preserved between reboots. If you have a large amount of DomU's, you need to create your own starup script that basically goes over the list of DomU's and does a "xm new -F name.sxp". Xen should preserve those changes automatically between reboots.




From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Stephen Spector
Sent: Friday, November 21, 2008 10:27 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Xen Documentation




I appreciate your comments on the Xen documentation. I have been looking for people in the community to assist with updating or creating new documents. I have some people working on various documents but there is still no formal community effort. I am currently working on the new Xen Roadmap document and plan to start updating other documents once that is complete. If you are interested in working on something for the community please let me know so I can keep track of who is doing what. Thanks.


Stephen Spector

Xen.org Community Manager


(772) 621-5062

BLOG: http://blog.xen.org





Message: 5

Date: Fri, 21 Nov 2008 16:57:21 +0100

From: Denny Schierz <linuxmail@xxxxxxxx>

Subject: [Xen-users] Xen documentation are still too old

To: xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>

Message-ID: <1227283041.27101.30.camel@kusanagi>

Content-Type: text/plain; charset="us-ascii"




i'm a real Xen user since version 2.0.7 and i still believe on the power and charme from Xen. I used Xen for my costumers, for my own and I'm proud to tell everybody about Xen, what they can do with the hypervisor and i've written severals German HOWTOs. But, where the sun is, the shadow isn't far away: Xen lacks absolutely on actual docs. The ManPages are still not updated (many FIXME), not all parameters are listed in (5), for example


cpu_cap and cpu_weight? How can i define it in a DomU config? (i know it, now)


another example:


"dom0-min-mem" is listed, but where is "enable-dom0-ballooning yes" ?

Take a look, what you have with "xm help" and what you get in the manpage.


At this time, i have to read the sourcecode, to know, what this means.

Xen has so many features, but without good manpages, nobody knows about them. Also the ("make -C docs") the documentation in the Xen source code, is more for developers (and still to old too), than for new users.

They better searching with Google for HowTos.


So, why it is so hard to take some time for a good documentation, instead of developing new features, where nobody knows,that they exists, if they don't read the source code or the mailinglists?


cu denny

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