| --- | Log | opened Mon Apr 04 00:00:23 2005 |
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| 05:00 | lilo | hehe, good one, solarce, mikegrb, no sense of humor about an April Fool's joke? ;) |
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| 05:16 | looksaus | hm, since yesterday, I have 3 umls running on a machine with 1.5Gb ram and 1Gb /tmp |
| 05:18 | looksaus | I overallocated memory to one uml |
| 05:18 | looksaus | resulting in /tmp getting full |
| 05:18 | looksaus | so I shut that one down |
| 05:19 | looksaus | and removed the file in /tmp |
| 05:19 | looksaus | but /tmp still says it's 100% full |
| 05:19 | looksaus | is there any solution or will I have to reboot the machine (and probably resize /tmp...) |
| 05:20 | looksaus | really strange these files in /tmp say they're 0 in size |
| 05:23 | looksaus | (the UML files I mean) |
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| 06:04 | sven | is there any way to specify the virtual machine cpu speed? we'd like to be able to emulate really old and crappy machines to better see the effects of protocol overhead |
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| 08:07 | bodo | hi all |
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| 09:45 | phobosd_ | eyo all. got me a stage3. someone gimme the url to the gentoo docs about building the root_fs? |
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| 10:03 | jdike | hi guys |
| 10:05 | mikegrb | howdy jdike |
| 10:05 | andyp | jdike! sup. |
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| 10:09 | bodo | hi jdike! |
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| 10:10 | sikkh | hi jdike, bodo |
| 10:11 | bodo | hi sikkh |
| 10:11 | jdike | Hi bodo, sikkh |
| 10:12 | | * jdike watches the n^2 greeting algorithm |
| 10:12 | --- | Netsplit uranium.oftc.net <-> kinetic.oftc.net quits: treestone, tchan_, phobosd, Shaun, fo0bar, schweeb, qbot_, desaster, nextime, flatronf700B, (+8 more, use /NETSPLIT to show all of them) |
| 10:12 | sikkh | jdike hehe |
| 10:12 | bodo | meanwhile UML on s390 is up in skas0! |
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| 10:12 | sikkh | bodo congrats :) |
| 10:12 | jdike | bodo: neat! |
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| 10:14 | jdike | bodo: when are you going to post a bootlog somewhere? |
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| 10:14 | sikkh | jdike this new intel virtualization tech which is hyped by arketing droids will be of any use to UML? |
| 10:14 | jdike | sikkh: yeah |
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| 10:14 | sikkh | jdike any speedups or whatnot? |
| 10:14 | jdike | sikkh: there is a project inside Intel to port UML to VT (the Intel version) |
| 10:15 | sikkh | jdike nice |
| 10:15 | jdike | sikkh: which should be immediately useable on pacifica (the AMD version) |
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| 10:15 | jdike | sikkh: speedups, basically |
| 10:15 | sikkh | jdike what can we expect? |
| 10:15 | sikkh | I mean how much |
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| 10:15 | jdike | sikkh: run system calls at hardware speed |
| 10:15 | sikkh | jdike sounds great |
| 10:15 | sikkh | jdike how? |
| 10:16 | sikkh | jdike will that make Xen obsolete? =) |
| 10:16 | jdike | sikkh: the guest is allowed to directly receive its own software interrupts |
| 10:16 | sikkh | hm |
| 10:16 | sikkh | no ptrace overhead? |
| 10:17 | jdike | sikkh: so UML will run in guest ring 0, and receive its process' system calls directly |
| 10:17 | jdike | sikkh: no ptrace overhead |
| 10:17 | jdike | sikkh: there's other overhead - it will be communicating with the host kernel |
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| 10:19 | andyp | phobosd, who are you |
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| 10:21 | bodo | jdike: I'm working on 2.6.11 + incrementals, but not bk8 |
| 10:21 | bodo | jdike: again, I have crashes when changing console screen size |
| 10:21 | jdike | bodo: hmmm |
| 10:21 | bodo | jdike: also, ssl=pts doen't work |
| 10:21 | jdike | bodo: on 390 or x86? |
| 10:21 | bodo | jdike: both |
| 10:22 | jdike | bodo: what happens with ssl=pts? |
| 10:22 | Newsome | Welcome back, jdike! |
| 10:22 | jdike | tx, Newsome |
| 10:22 | jdike | got back last night |
| 10:22 | Newsome | and congrats! |
| 10:22 | jdike | my body thinks it's 11-12PM right now |
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| 10:24 | sikkh | jdike ah, thx for explanation |
| 10:25 | sikkh | Newsome congrats on what? :) |
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| 10:28 | Newsome | sikkh: - http://marc.theaimsgroup.com/?l=user-mode-linux-devel&m=111135633631837&w=2 |
| 10:32 | sikkh | jdike congrats! |
| 10:33 | jdike | sikkh: tx! |
| 10:33 | sikkh | jdike I hope small jdikes will be as gifted in computers as you :> |
| 10:33 | jdike | and I'll be useful again once I'm not on China time any more |
| 10:33 | sikkh | jdike :) |
| 10:33 | jdike | sikkh: hehe |
| 10:34 | bodo | jdike: congrats from me, too! |
| 10:35 | jdike | bodo: tx, and UML/s390 was a nice present to come back to |
| 10:35 | jdike | anyway, gotta go shopping so I won't starve today |
| 10:36 | jdike | back in a bit |
| 10:36 | bodo | jdike: ssl=pts is working, was my problem! |
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| 10:38 | andyp | anyone got a decent centos fs? |
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| 10:42 | --- | User: *** timster_ is now known as timster |
| 10:42 | --- | Channel: services.oftc.net changed the topic of #uml to: Welcome to #UML - current releases: 2.4.27-um1 | 2.4.24-um1 (rock solid) | 2.6.9-bs5 | http://user-mode-linux.sf.net (Mainpage) | http://www.usermodelinux.org (communitypage) | http://www.user-mode-linux.org/~blaisorblade/ (SKAS/guest -bb and -bs patches) | http://uml.harlowhill.com/ (Wiki page for documentation) |
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| 11:28 | jdike | back |
| 11:31 | bodo | jdike: ok. ssl=pts is working on x86 and s390, but changing size of console crashes both. |
| 11:49 | jdike | bodo: how are you attaching to those serial lines? |
| 11:49 | jdike | bodo: I use screen, but get no SIGWINCH support at all |
| 11:50 | bodo | jdike: I'm using stdio-console |
| 11:51 | | * jdike doesn't understand |
| 11:51 | bodo | jdike: problems with ssl=pts are gone: that was a administrative problem only (shame on me ...) |
| 11:52 | bodo | jdike: changing size of stdio-console now again crashes my systems |
| 11:52 | jdike | bodo: OK |
| 11:52 | jdike | bodo: the main console |
| 11:52 | bodo | jdike: yes. |
| 11:54 | jdike | not reproducable here |
| 11:55 | jdike | except quilt series shows I'm not using any of my incrementals :-) |
| 11:55 | jdike | hold on |
| 11:56 | jdike | bodo: how much of the 390 stuff didn't fit under the existing arch interfaces? |
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| 12:04 | bodo | jdike: I have a bunch of patches that need merging ... |
| 12:05 | --- | ---> the_hydra [~a_mulyadi@202.147.200.25] has joined #uml |
| 12:05 | the_hydra | hello |
| 12:08 | the_hydra | anyone here can briefly explain, how UML manage context switch between processes on guest system? |
| 12:10 | jdike | bodo: I bet :-) |
| 12:11 | the_hydra | helo jeff |
| 12:11 | jdike | the_hydra: tt mode or skas? |
| 12:11 | bodo | jdike: I have one general patch (make clone.c a user-obj) plus 18 further patches for subarch-splitting :-) |
| 12:11 | the_hydra | jdike: SKAS |
| 12:12 | jdike | the_hydra: OK, in two words, setjmp/longjmp |
| 12:12 | the_hydra | jdike: no need to reload "virtual" segment registers? |
| 12:13 | jdike | the_hydra: there's also a magic address space switch on the host, and that's where segments get switched |
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| 12:15 | jdike | bodo: looks like I need to seriously start thinking about getting skas0 into mainline |
| 12:15 | bodo | jdike: should I send the patches? |
| 12:15 | jdike | bodo: yup, cc uml-devel |
| 12:15 | the_hydra | jdike: u mean, SKAS for mainline kernel tree inclusion? |
| 12:16 | bodo | jdike: skas0 works fine for me, currently I'm working on the skas3 patch for my host |
| 12:16 | jdike | the_hydra: skas0 == skas on unmodified hosts |
| 12:17 | bodo | jdike: on s390, skas0 needs an 2.6 host which additionally needs to be modified a very little bit |
| 12:17 | jdike | bodo: with the incrementals, I still can't reproduce a SIGWINCH crash |
| 12:17 | jdike | bodo: how so? |
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| 12:19 | bodo | jdike: I'm still using 2.6.11 + incrementals from march, 7th |
| 12:19 | jdike | bodo: right, you mentioned that earlier, and I forgot |
| 12:20 | bodo | jdike: if you changed it later, I only have to rebase |
| 12:20 | jdike | bodo: what's the small host change you need? |
| 12:21 | bodo | jdike: s390 normally can't skip syscall-restart-handling in host! |
| 12:21 | bodo | jdike: they hold syscall-number and syscall result in the same register |
| 12:21 | jdike | bodo: oops |
| 12:22 | jdike | bodo: that's not just a skas0 problem, that's rather more basic |
| 12:22 | bodo | jdike: and they have a hidden "trap"-field in pt_regs, that indicates syscall/!syscall |
| 12:22 | bodo | jdike: yeah, but a skas3-patch might change this easily |
| 12:23 | jdike | bodo: hidden means you can't get it with ptrace? |
| 12:23 | bodo | jdike: yes. That's the problem. |
| 12:23 | jdike | bodo: oh well |
| 12:24 | jdike | bodo: send patches to Martin, I guess :-) |
| 12:24 | bodo | jdike: I solve this by setting the trap to "!syscall", if the syscall-number is set to a negative value on the first syscall interception. So, no interface-change is needed! |
| 12:25 | bodo | jdike: yes. I'll send it to Martin. He already got a fix for a bug from me. (found while testing UML!) |
| 12:27 | jdike | bodo: hehe |
| 12:28 | bodo | jdike: they switched to the separate signal-stack, even if it was disabled again ... |
| 12:29 | bodo | jdike: so the stack pointer was (0-sizeof(stack_frame)) |
| 12:30 | jdike | bodo: whoops |
| 12:30 | bodo | jdike: and s390 ignores the highest bit of the address, so no protection-error! |
| 12:32 | bodo | jdike: I have to go home now. |
| 12:32 | jdike | bodo: BTW, you might also send an announcement to LKML |
| 12:32 | bodo | jdike: Announce UML/s390? |
| 12:32 | jdike | bodo: depending on how public you want it to be |
| 12:33 | jdike | bodo: yeah |
| 12:33 | bodo | jdike: I think, that's a good idea. |
| 12:33 | bodo | jdike: but I have to talk about here. |
| 12:34 | jdike | bodo: OK |
| 12:34 | bodo | jdike: I'll write comments for my patches tomorrow, than send a tarball. |
| 12:34 | bodo | jdike: are you interested in the s390-patch? |
| 12:34 | jdike | bodo: I would have thought that the uml-devel announcement would have been public enough to have prompted whatever internal discussion was required |
| 12:34 | jdike | bodo: sure I am |
| 12:35 | bodo | jdike: it's not fully tested, so I'll send this to you only |
| 12:35 | | * Newsome would test out the patch, but doesn't have an S390 :) |
| 12:36 | bodo | Newsome: try hercules? |
| 12:36 | jdike | bodo: do you want me to merge it into the incrementals? |
| 12:36 | Newsome | oh, cool |
| 12:37 | Newsome | looks like a full virtual machine |
| 12:38 | jdike | Newsome: a full 390 instruction emulator |
| 12:38 | bodo | jdike: I'm not sure, what makes sense. If skas3 and tt are running, it should go into the incrementals |
| 12:38 | jdike | bodo: at the least, I think I should look at whatever arch interface changes you made |
| 12:39 | jdike | bodo: and merge them, so the 390 patch can be trimmed down to something which is purely 390-specific |
| 12:40 | bodo | jdike: that's what I have. A tarbal of changes to the current sources |
| 12:40 | bodo | jdike: and a big patch, that adds the s390-files |
| 12:40 | jdike | bodo: good |
| 12:40 | bodo | jdike: the tarball should be quite stable, the s390-patch I guess not |
| 12:40 | jdike | bodo: likely |
| 12:41 | bodo | jdike: so I'll send the tarball to the list, and the s390-patch to you only |
| 12:41 | | * jdike now needs someone to donate a s390 so this can be "properly maintained" :-) |
| 12:41 | jdike | and also a good excuse for why hercules isn't good enough |
| 12:42 | bodo | jdike: I'll ask our managers ;-) |
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| 12:42 | jdike | bodo: hehe |
| 12:43 | bodo | Sorry, I'm in a hurry now. Bye |
| 12:43 | jdike | bye |
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| 13:11 | Blaisorblade_ | | Hi Jeff! |
| 13:11 | --- | User: *** Blaisorblade_away is now known as Blaisorblade |
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| 13:25 | the_hydra | back |
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| 13:42 | the_hydra | gtg |
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| 13:48 | gnufan | bah networking - now have a bridge set up and UML boxes work okay and then die mysteriously (urm the shell just hangs unresponsively and the networking dies, so screen "^ak" does the job :( ) when doing name resolution type stuff (host, dig) etc. Clues? |
| 13:50 | gnufan | I think maybe the bridge is forgetting something like where these addresses are.. |
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| 14:51 | jdike | Blaisorblade: hi! |
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| 15:15 | gnufan | Argh - what does "dig" do that is so awful that my IP networking hangs? |
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| 15:25 | gnufan | it is worse than hangs IP - it seems to hang the whole UML... oh dear back to the manual. |
| 15:28 | jdike | gnufan: can you get a stack trace from the hang? |
| 15:29 | gnufan | jdike, of dig or linux? |
| 15:30 | gnufan | I think it is a general networking problem --- I had some weird errors earlier about resources full in the network stack, but that might just be because packets were queuing up for a dead interface? |
| 15:31 | jdike | gnufan: can the network be revived by typing at the UML? |
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| 15:32 | gnufan | jdike, sorry lost me there? This time I got a prompt back, but networking has dropped again. I have a bridge interface as per one of the howto's, the other UML and host are working but tap0 has stopped working. |
| 15:32 | --- | User: *** timster_ is now known as timster |
| 15:33 | gnufan | jdike, seems to happen most with "dig" or other name lookup tools, perhaps they are the only stuff talking to the local ethernet rather than through the router?? |
| 15:34 | jdike | gnufan: does the UML hang or not? and what version of UML? |
| 15:35 | gnufan | sometimes hangs?! Still figuring it out.. Linux version 2.4.26-3um from Debian debs |
| 15:36 | jdike | gnufan: can you see if 2.6.11 has the problem? |
| 15:36 | gnufan | jdike, that is the UML kernel not the host kernel right? |
| 15:37 | jdike | timster: Intel's VT virtualization extensions |
| 15:37 | timster | nice |
| 15:37 | timster | thats going into uml? |
| 15:38 | jdike | timster: support for it, yet |
| 15:38 | timster | :} |
| 15:38 | jdike | s/yet/yes |
| 15:38 | timster | cool |
| 15:39 | jdike | timster: that's what all the OS abstraction patches in my incrementals are about |
| 15:39 | timster | nice |
| 15:39 | timster | those are going in now? |
| 15:40 | jdike | timster: not into mainline as yet |
| 15:40 | timster | :} |
| 15:40 | jdike | timster: since the OS interface is a major one, we're going to see how we can clean it up before sending it on |
| 15:41 | jdike | Plus there's the actual VT support, which is sekrit rght now |
| 15:41 | timster | :} |
| 15:42 | jdike | not to mention that we're only now starting to write it |
| 15:42 | gnufan | jdike, sorry to be dense but can you clarify the kernel you think I should try. |
| 15:42 | timster | fun |
| 15:42 | jdike | gnufan: stock 2.6.11 |
| 15:42 | timster | thanks jdike |
| 15:42 | | * timster -were not worthy- |
| 15:43 | jdike | timster: np |
| 15:44 | gnufan | jdike, presumably with uml patches? As the sourceforge page mentions, or do you mean for the host? |
| 15:44 | jdike | gnufan: 2.6.11 as the UML, no patches needed |
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| 15:55 | schmil | need help with running uml for the first time this is the error i get INIT: Id "0" respawning too fast: disabled for 5 minutes |
| 15:58 | alejandro_f | HI, I'm doing my tesis about UML,Please, help about sites with information |
| 15:59 | alejandro_f | I'm starting........With documentation |
| 16:01 | Newsome | alejandro_f: Documentation isn't great. You might check out the sites in the channel topic |
| 16:01 | Newsome | schmil: likely a problem with the tty in /etc/inittab |
| 16:02 | schmil | Newsome :I read about the problem but I'm new to kernel programming and don't know what to tod |
| 16:03 | Newsome | schmil: Start your UML with a command line like this: "./linux con0=fd:0,fd:1 con=null" and make sure the first console in /etc/inittab is for tty0 |
| 16:04 | gnufan | jdike, when you say stock I assume you mean I should download source and build for uml, rather than a Debian prepackaged 2.6.11 kernel? packages.debian.org is dead tonight... |
| 16:05 | Newsome | gnufan: Yes, that's what he means :) |
| 16:05 | schmil | Newsome, I also get this error while booting /etc/rc.d/rc.sysinit: line 57: /dev/tty0: Permission denied could that be the reason |
| 16:06 | Newsome | "Permission denied"? Haven't seen that, but yes, it's likely to be a problem. Check ownership and permisisons of /dev/tty0 in the UML filesystem. |
| 16:07 | schmil | what should it be |
| 16:07 | gnufan | Newsome, ta - my networking problems turn out to have more than one cause I think... |
| 16:08 | Newsome | schmil: Whatever it is on the host system. Here's what mine looks like: ll /dev/tty? |
| 16:08 | Newsome | crw-rw---- 1 root root 4, 0 Jan 6 05:14 /dev/tty0 |
| 16:09 | gnufan | http://www.user-mode-linux.org/ --> Apache test page?!? |
| 16:09 | jdike | gnufan: user-mode-linux.sf.net |
| 16:09 | schmil | crw-rw-rw- 1 root root 5, 0 Feb 23 2004 mnt/dev/tty |
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| 16:10 | schmil | crw--w---- 1 root tty 4, 0 Feb 23 2004 mnt/dev/tty0 |
| 16:11 | schmil | what should i change just the permission or the group too |
| 16:19 | Newsome | no idea. Haven't seen problems with that. What version is the UML kernel, and are you using a static /dev, devfs, or udev? |
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| 16:23 | schmil | the host is running FC3 and the uml kernel is 2.6.11 about the question sorry i need more explanation I'm quite new |
| 16:24 | schmil | byt he way the root_fs i've dowloaded is baseed on fc2 |
| 16:32 | schmil | i did change in inittab ttys/0 to tty0 but that didn't help |
| 16:34 | gnufan | Newsome, how should the 2.6.11 kernel try to talk to me? I just see "tracing thread pid = NNNNN" then a couple of numbers (hex?) and then a load of ]0... |
| 16:34 | gnufan | Then control returns to the shell |
| 16:38 | Newsome | schmil: might want to try with "devfs=nomount" option |
| 16:38 | Newsome | gnufan: Shouldn't return to the shell like that. It should just start booting up. |
| 16:40 | gnufan | Newsome, well that is what the other kernels did.... |
| 16:41 | gnufan | Anyone have a stock 2.6.11 kernel that works I can try... or swap... to compare? |
| 16:42 | Newsome | gnufan: You can try this one - http://uml.tuxrocks.com/tmp/linux-2.6.11 |
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| 16:44 | gnufan | Newsome, that one segfaults -- which at least is more obvious |
| 16:45 | Newsome | odd |
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| 16:51 | gnufan | Newsome, hmm segfaults and leaves some tasks? |
| 16:52 | Newsome | really? What's the host kernel? |
| 16:53 | gnufan | Linux version 2.4.27-2-686 (horms@charles.lab.ultramonkey.org) |
| 16:53 | Newsome | hmm, odd |
| 16:53 | gnufan | Argh I'm inundated with uml processes.... killall let me down... |
| 16:54 | Newsome | You ought to be able to kill the processes, but if they don't seem to be dying, try sending them SIGCONT |
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| 17:02 | gnufan | When it says I need a current uml_utilities in the documentation... are any of these invoked directly by the kernel... I assume running the kernel should just work? |
| 17:05 | Newsome | the uml_utilities is needed on the host for a couple things, such as tunctl (needed to create and destroy tuntap devices for networking) and the port-helper (used for opening terminals) |
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| 17:13 | gnufan | Newsome, this is getting old very quickly here.... is are there any documented configurations on UML that actually work in a stable fashion? |
| 17:18 | Newsome | I don't know of any documentation. However, I'm currently running stock 2.6.11 UMLs on a 2.6.12 host with the SKAS patch, and I find it quite stable. |
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| 17:19 | gnufan | Newsome, how do you start the instances? |
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| 17:21 | Newsome | Here is one script I've used to start UMLs in a chroot. Not necessarily the easiest way to do it, but it has worked in the past - http://uml.tuxrocks.com/tmp/start_uml |
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| 19:57 | piem | hi |
| 19:58 | piem | i am trying to reach a uml from screen, but all i get is a syslog tail. how do i get to a prompt again ? |
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| --- | Log | closed Tue Apr 05 00:00:56 2005 |
