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#uml IRC Logs for 2007-10-03

---Logopened Wed Oct 03 00:00:47 2007
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---Logclosed Wed Oct 03 03:24:46 2007
---Logopened Wed Oct 03 03:24:48 2007
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10:52<newbie-#uml->>Can someone help me with a network configuration question with UML?
10:53<newbie-#uml->>Really maybe just a pointer to detailed enough docs describingthe 3 approaches in full detail. I have had success by using tuntap but want tell it on the command line to use a static ip for the user mode linux machine - this way I hope to be able to do a standard kickstart of a system
10:53<newbie-#uml->>Ie: use kickstart to setup my uml system
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10:57<jdike-#uml->>Hi guys
10:57<peterz-#uml->>jdike: I finally found it!
10:58<jdike-#uml->>what was it?
10:58<dang-#uml->>newbie: I'm not sure there's a simple way to do that... What I do is either mount a uml's configs from outside of it, or use DHCP with fixed MAC addresses...
10:58<peterz-#uml->>jdike: race in process_backlog() details in email
10:58[~]jdike #uml will look#uml-> will look
11:00<Magotari-#uml->>jdike: I just noticed today, you cc'd me in the mesplit patch with a typo in my email. No big deal, thought I should point it out, just in case.
11:00<jdike-#uml->>yeah, I noticed
11:00[~]jdike #uml can't spell gmail#uml-> can't spell gmail
11:01<Magotari-#uml->>No problem, just for future reference and all...
11:01<Magotari-#uml->>I am going to stick around for a while more, and I will look for more bugs. :)
11:03<jdike-#uml->>I'm working on the kmem one
11:03<jdike-#uml->>peterz, interesting
11:03<jdike-#uml->>odd that it didn't show up anywhere else
11:03<peterz-#uml->>jdike: yeah, took me long enough
11:04<Magotari-#uml->>I will be able to test any patches as they come, but for now I need to make food.
11:04<peterz-#uml->>jdike: I guess most my real hardware has NAPI drivers
11:10<newbie-#uml->>dang: I'd use dhcp but need more info on how to get that working - I tried specifiying it on the command line but the dhcp packets don't get forwarded by the host machine so it can't get an address - I think there is some sort of arp cache trick needed on the host somewhere or perhaps a change to a param in /proc/net somewhere - I DO turn on forwarding for IP4 and IP5 but that's tcp only
11:10<newbie-#uml->>and I believe dhcp uses udp
11:13<jdike-#uml->>there is a dhcp forwarder
11:13<jdike-#uml->>IP-level forwarding doesn't work for DHCP, obviously
11:13<jdike-#uml->>DHCP is an ethernet protocol, not IP (TCP or UDP) at all
11:13<dang-#uml->>newbie: All you need to do is tell your DHCP server that it should be running on the tap device.
11:14<dang-#uml->>(assuming it's running on the same box as the UMLs, of course...)
11:16<jdike-#uml->>if not, then bridging the tap device with the host's eth0 will work, as will dhcp-fwd
11:19<newbie-#uml->>is dhcp-fwd part of the uml tools or where would I find it - it sounds like the simplest solution for me since I don't want to setup my own dhcp server on the host machine - the IT group might not like it if I did anyway since there is a risk I could misconfigure it and start serving the rest of the company
11:20<newbie-#uml->>I could also use the bridging approach, if there are some simple setup steps describing it somehwhere
11:23<jdike-#uml->>google for it
11:23<jdike-#uml->>it's a separate tool
11:24<newbie-#uml->>sounds good. I will do that. Thank you jdike and dnag
11:24<newbie-#uml->>err that would be dang (sorry dang)
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13:03<Magotari-#uml->>jdike: Is it a problem if a set of configuration options does not compile? I have such a thing, I believe.
13:10<jdike-#uml->>probably it is
13:12<Magotari-#uml->>Not so sure about that. The option in question is # CONFIG_PRINTK is not set. Only a loonie would set that on in UML.
13:12<Magotari-#uml->>I think that configuration option should be just disabled for UML.
13:15<jdike-#uml->>I should think that it should still build
13:16<Magotari-#uml->>I hope I am not becoming your worst nightmare.
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13:51<Magotari-#uml->>Ok, I am on it.
13:51<jdike-#uml->>the kmem thing is surprisingly subtle
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13:59<Magotari-#uml->>jdike: It built fine. Run testing time. :)
13:59<jdike-#uml->>it's pretty quiet
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14:03<Magotari-#uml->>Yeah, it was quiet. Until my sytem went crazy. I disabled hotplug too, you see.
14:03<Magotari-#uml->>But it seemed to work fine, really.
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14:35<Magotari-#uml->>There is a problem.
14:35<Magotari-#uml->>I cannot get any image going now.
14:36<Magotari-#uml->>This is not a print or hotplug issue, it seems.
14:38<Magotari-#uml->>Yeah, there is a problem, my failsafe kernel works with the same kernel commandline. Investigating...
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15:33<Magotari-#uml->>And now I cannot get it to fail anymore. Ah hell.
15:33<Magotari-#uml->>I do have another build failure to report though.
15:34<Magotari-#uml->>In -mm if you select SMP.
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15:37<jdike-#uml->>that's not supposed to work yet anyway
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16:04<Magotari-#uml->>I have something mildly strange here to report. I booted into the "Kilogram of the Archives.", my debug/benchmark image. Then I used nmap to scan I got a really high uptime, 400+ days.
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16:05<Magotari-#uml->>But now it seems to be reporting fine. I will reboot it again and see.
16:06<Magotari-#uml->>Yeah, nmap reports 497 days just after I boot. But uptime reports just a minute.
16:08<Magotari-#uml->>I would love to test that on a real system, might be an nmap bug, but I just don't have one handy.
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---Logclosed Thu Oct 04 00:00:23 2007