TheGrebs.com:IRC Logs:#uml:2007:04:08

---	Log	opened Sun Apr 08 00:00:38 2007
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01:57	<filip>	g'day. im looking for something like the umld that's described at http://user-mode-linux.sourceforge.net/contrib.html - but that site seems down and looks like it's not coming back. any suggestions?
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14:13	<aroscha>	hi!
14:15	<aroscha>	stupid question probably - I guess I just need a pointer to some docu / FAQ. But: when I start zethix@sandwich:~/uml$ ./kernel32-2.6.20.4 ubd0=./Debian-3.1-x86-root_fs
14:15	<aroscha>	then i get the first few lines of UML output and then it stops. Exit code =1
14:15	<aroscha>	Checking that ptrace can change system call numbers...OKChecking syscall emulation patch for ptrace...OKChecking advanced syscall emulation patch for ptrace...OKChecking for tmpfs mount on /dev/shm...OKChecking PROT_EXEC mmap in /dev/shm/...OKChecking for the skas3 patch in the host: - /proc/mm...not found - PTRACE_FAULTINFO...not found - PTRACE_LDT...not foundUML running in SKAS0 modezethix@sandwich:~/uml$ echo $?1
14:16	<aroscha>	oops
14:16	<the_hydra>	oops what?
14:16	<aroscha>	sorry, I guess that copy&paste was not readable for some people
14:16	<the_hydra>	ok, it ends running in SKAS0...
14:16	<aroscha>	yes
14:16	<aroscha>	and then nothing
14:16	<aroscha>	exit code == 1
14:17	<aroscha>	I guess I just made a stupid mistake
14:17	<aroscha>	I got the kernel from http://uml.nagafix.co.uk/
14:17	<aroscha>	x86. No AMD64 or so
14:18	<aroscha>	anybody any idea what could be going wrong?
14:18	<the_hydra>	oh, so your machine is AMD64?
14:18	<aroscha>	no
14:18	<HuK0B>	aroscha get vanila kernel and patch it with skas3 pre9
14:19	<HuK0B>	get patch from http://www.user-mode-linux.org/~blaisorblade/
14:19	<aroscha>	ok....
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14:19	<HuK0B>	this is host kernel I mean
14:19	<the_hydra>	HuK0B: is there a bug in SKAS0?
14:20	<aroscha>	but what is the reason that it will not run?
14:20	<HuK0B>	don't know but I had same problem on amd64 I downloaded 2.6.20 I think and patched it and everything was fine for me
14:20	<aroscha>	BTW: I trueid die blaisorblade stuff on an AMD64 and it also did not work
14:20	<aroscha>	I see
14:24	<aroscha>	well, thanks for the answers! Going to try that now
14:33	<the_hydra>	good luck aroscha
14:33	<aroscha>	thanks, I will report
14:34	<aroscha>	I was even stracing the stuff but found no reasonable errors before
14:39	<the_hydra>	usually, that means "silent" corruption
14:46	<the_hydra>	gtg
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14:50	<aroscha>	hmm... one more question. Do I need to recompile the host kernel with blaisorblade's patches or is it enough to compile a UML (make ARCH=um) kernel like that (and leave the host kernel on 2.6.15 level for example)
14:50	<aroscha>	?
14:53	<baroni>	aroscha: blaisorblade adds extra improvments
14:54	<baroni>	as far as i know
14:54	<baroni>	:P
14:54	<aroscha>	but for the host OS or for the UML kernel (thge "client")?
14:54	<aroscha>	s/thge/the
14:55	<baroni>	the kernel of the main system should be a 'normal' one
14:55	<aroscha>	ok.. fine
14:55	<aroscha>	thanks!
14:55	<aroscha>	then I am on the right way :)
14:55	<baroni>	i'll take a better check now just to be sure ...
14:56	<baroni>	http://www.user-mode-linux.org/~blaisorblade/
15:05	<baroni>	actually, it's better you ask about skas patchs for someone else hehe
15:05	<baroni>	seems that i was wrong as i am taking a better look now
15:08	<HuK0B>	download skas3 patch for main kernel
15:09	<HuK0B>	http://www.user-mode-linux.org/~blaisorblade/patches/skas3-2.6/skas-2.6.20-v9-pre9/skas-2.6.20-v9-pre9.patch.bz2
15:11	<baroni>	thanks HuK0B !
15:12	<baroni>	hehe
15:31	<aroscha>	ok did that. runs (on a x86 )
15:31	<aroscha>	thanks!
15:31	<aroscha>	and the busybox image was up and running really fast!
15:46	<aroscha>	another question to the highly respected readers of this educated channel (;-) )_: If I want to start 2000 UML instances... will 8 GB be enough ?
15:52	<aroscha>	or in other terms: what will the UML overhead be?
15:53	<aroscha>	let's say I have 2000 root fs images, each 16MB big (like the sample busybox image)
15:53	<aroscha>	does each root fs image + UML kernel have it's own memory ? or is there potential for sharing common code segments?
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16:04	<mcr>	hi.... did bb every do a git tree?
16:14	<aroscha>	oh my I am a goat :) It is all described http://user-mode-linux.sourceforge.net/skas.html here anyway
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16:19	<mcr>	hi.
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20:52	<HD>	Hello, I need information about UML in real time?
20:53	<HD>	or information about uml and model for C ansi
20:55	<HD>	anybody home
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21:17	<mcr>	silly.
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22:29	<Internat>	does the linux-source-vserver part.. is that for the host kernel or the guest kernel?
22:32	<mcr>	vserver isn't a host/guest thing.
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23:08	<Internat>	oh my bad
23:09	<Internat>	i was under teh impression it was todo with uml
23:28	<mcr>	no, vserver is a kernel-based system, where is the one kernel, and many userlands.
23:28	<mcr>	it's closer to a very extensive chroot(2)/jail(2), than a virtualization system.
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23:41	<Internat>	ah :) yeah one o the guys in linode just explained that to me :)
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---	Log	closed Mon Apr 09 00:00:27 2007