TheGrebs.com:IRC Logs:#xen:2007:01:15

---	Log	opened Mon Jan 15 00:00:58 2007
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10:01	<Stp1800>	Hi guys.
10:02	<Stp1800>	I've installed a machine with the virt-install program on Fedora and after the install process I'm not sure how to start the machine again so I can customize it.
10:02	<danp1>	once you've got a machine successfully installed with virt-install
10:02	<danp1>	then it will have a config defined in /etc/xen
10:03	<danp1>	so you can simply do 'xm create <name of guest>'
10:03	<danp1>	or if you're feeling lucky 'virsh start <name of guest>'
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10:12	<Stp1800>	Once the machine is crated will it boot when the xend process is started?
10:12	<Stp1800>	the next time?
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10:17	<danp1>	you need to manually configure that by creating a symbolic link from the config file in /etc/xen into /etc/xen/auto
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10:41	<Stp1800>	Ok, after I patch the machine with all updates and such can I use the normal shutdown command in Fedora to reboot or should I use the Xen shutdown command?
10:41	<Stp1800>	Also when I use the shutdown command for Xen will all data be saved that I'm working on in the guest?
10:42	<aliguori>	Stp1800: xm shutdown is more or less equivalent do doing a shutdown -h now in the guest
10:42	<aliguori>	in fact, xm shutdown triggers an exec of shutdown -h now (or something similar) IIRC
10:42	<murb>	aliguori: how does that work for not linux?
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10:42	<murb>	guests
10:43	<aliguori>	murb: it's a notification.. the os is free to do whatever it wants with it
10:43	<aliguori>	murb: so with linux, it does an exec. dunno how it's handled elsewhere
10:43	[~]	aliguori thinks it's a stupid command :-)
10:43	<murb>	can you update the command in /proc or /sys?
10:44	<aliguori>	murb: nope
10:44	<aliguori>	IIRC, it's hardcoded to try a few different commands
10:44	<murb>	a pity they didn't send something that init would notice.
10:44	<murb>	like powerfail.
10:45	<aliguori>	murb: i think triggering that sort of event would largely depend on what you have running in userspace
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11:41	<msinhore>	hello all. I'm writing a article and I have a question: why using HVM the performance has more overhead that if I will use PVM? Exist a paper or article about this?
11:42	<hollisb>	msinhore: http://virt.kernelnewbies.org/
11:42	<danp1>	msinhore: not directly answering your question, but there are a couple of online pages which may be of interest to you :
11:42	<danp1>	http://virt.kernelnewbies.org/TechOverview
11:43	<danp1>	and
11:43	<danp1>	http://www-128.ibm.com/developerworks/linux/library/l-linuxvirt/?ca=dgr-lnxw01Virtual-Linux
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11:43	<msinhore>	danp1: ok, thanks for your help :)
11:46	<riel>	msinhore: the performance overhead of full virtualization is largely in the device emulation btw, not in the HVM capabilities itself
11:47	<riel>	msinhore: coopvirt could bring the performance and other benefits of paravirtualization with less code, but a reliance on HVM capable hardware
11:47	<ns>	msinhore: this is equally unhelpful, but http://en.wikipedia.org/wiki/Native_virtualization
11:47	<riel>	msinhore: see http://virt.kernelnewbies.org/ParavirtBenefits
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11:51	<aliguori>	riel: shadow paging also plays a significant role
11:51	<aliguori>	ns: "native virtualization" is a virtual iron marketing term
11:51	<riel>	aliguori: good point, but with hardware nested pagetables that overhead should be mostly gone
11:51	[~]	aliguori likes cooperative virtualization or hybrid virtualization better
11:51	<aliguori>	riel: yup
11:52	<msinhore>	riel, ns: right! thanks! it's very impórtant information for me!
11:52	<ns>	yup, i'm guessing that's something they wrote
11:52	<riel>	msinhore: feel free to use any of the info on virt.kernelnewbies.org, it's creative commons by licensed
11:54	<msinhore>	riel: it's wonderful ;-)
11:55	<riel>	the only requirement is that you mention that you used some material from the site and link to it (cc-by)
11:55	<riel>	that is done because most derivative articles are only written once, while the wiki is getting regular updates
11:56	<riel>	the attribution allows people to find the updated information
11:56	<msinhore>	riel: it's perfect and just
11:57	<msinhore>	riel: one more time, thanks.
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14:28	<tweakism>	I'm running Ubuntu Edgy w/ xen from apt, amd64, m2n4-sli nforce4 mobo, AM2 socket. I have issues with
14:28	<tweakism>	xen freezing on boot, happens at the moment initramfs init runs the real init.
14:29	<tweakism>	I sometimes see kernel panics for Invalid opcode 0000 [1] SMP
14:29	<tweakism>	linux won't boot period w/o enable_8254_timer
14:29	<tweakism>	mobo bios is newest version.
14:29	<tweakism>	how can I diagnose xen freeze-on-boot issues?
14:29	<tweakism>	have tried every possibly-relevent xen and kernel command line arg.
14:29	<brendan>	first thing to do is probably to try a newer xen
14:30	<tweakism>	yeah.
14:30	<tweakism>	there's only a point release newer, but I'm compiling it now.
14:32	<brendan>	there are more than 1300 changesets in the tree between 3.0.3 and 3.0.4
14:32	<tweakism>	well, cross your fingers for me then
14:32	<brendan>	ok
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16:50	[~]	msinhore is away:
16:52	<brendan>	/ignore msinhore
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20:47	<icblenke>	anyone play with virtualbox?
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---	Log	closed Tue Jan 16 00:00:42 2007