| kblin | hm, durn. it would've been too easy to expect that blog post on building kernels to just work | 14:57 |
|---|---|---|
| hamannp | Build a rootfs from scratch | 18:47 |
| hamannp | ?? | 18:47 |
| Martyn | yep | 18:52 |
| Martyn | you need help? | 18:52 |
| hamannp | Yeah. I get a bunch of nasty errors. I can't get networking. | 18:53 |
| Martyn | Ick | 18:53 |
| Martyn | there are some better ways to get a rootfs now | 18:54 |
| Martyn | you can strip one out of the dove or i.mx51 image | 18:54 |
| hamannp | Ok. Leta dmit something: I don't know what I'm doing. Can I explain what I want to do? | 18:54 |
| hamannp | hello? | 18:57 |
| armin76 | lol | 19:01 |
| armin76 | explain, explain :) | 19:01 |
| hamannp | Ok. | 19:01 |
| hamannp | I have a sheeva plug kit. I put it on my network, and put a full app stack on it. I have the same app arch scaled horizontally on Ubuntu amd64 VMs. I thought to myself, it would be cool to emulate some arm vms, and reproduce the horizontal architecture on Arm. Follow me? | 19:03 |
| armin76 | hrm... | 19:06 |
| armin76 | emulate arm on arm? | 19:06 |
| hamannp | Nope. I'll keep explaining. So I have a home Lan network. It has a bunch of old Pcs, this Sheeva kit, and a bunch of VMs. It's behind a router from my Cable provider. The VMs connect to this lan through a static bridge network on a Host. br0. I want to emulate 6 or 7 arms on qemu so that I can try out a deployment arch that I already have on amd64 vms. Make sense? | 19:08 |
| armin76 | so you want to emulate arm :D | 19:09 |
| hamannp | Yes! And use my existing static br0 with multiple emulated arms with static ips. | 19:10 |
| hamannp | I'm stuck getting even one built cleanly. I also can't get it on my bridge NW, even when I copy over configs from my exisitng amd64 vms. | 19:11 |
| armin76 | can't help on that, sorry | 19:13 |
| hamannp | How bout a tut on getting even one built? I tried the main wiki, and I get nasty errors. I can pro'lly figure out the networking. I think the problem is that I can't build it without errors. | 19:14 |
| hamannp | BTW, the wiki links to an old kernel. The bug report says that some of the errors I got have been fixed. IS there a magic vault of up to date ARM kernels and img's somewhere? | 19:16 |
| armin76 | no clue, you should ask ogra or lool | 19:19 |
| hamannp | ok thanks! | 19:20 |
| Martyn | armin76: To whom should I address the request to have a smooth-stone PPA for karmic? | 19:20 |
| Martyn | I have a working dist now for our in-house work | 19:20 |
| Martyn | it runs on the pbx-a9 | 19:20 |
| armin76 | woot | 19:21 |
| armin76 | Martyn: why you ask me? :P i don't have anything to do with ubuntu :) | 19:22 |
| armin76 | but same answer as hamannp :D | 19:22 |
| Martyn | LOL | 19:22 |
| Martyn | because you hang here, and just might have picked up the info | 19:23 |
| Martyn | <-- not canonical either, right :) | 19:23 |
| Martyn | armin76 : You're an amazing font of information sometimes | 19:23 |
| armin76 | :D | 19:24 |
| NCommander | Martyn, I had talked with lool earlier today on how we could do "universal" armel images for SoCs that used u-boot as a bootloader | 20:26 |
| NCommander | (basically, an extension of the boot.scr functionality I created) | 20:26 |
| NCommander | Martyn, but I need a per-soc identifier to make it work, and the MACH_ID is probably the best way to it (with a way for us to override it if necessary ;-)) | 20:26 |
| Martyn | I think so too | 20:30 |
| NCommander | Martyn, hence why I'm talking to wdenk on this | 20:31 |
| Martyn | yep yep | 20:32 |
| Martyn | I don't know why there is this huge push against non devtree solutions | 20:32 |
| NCommander | Martyn, I'll be first to admit our universal image idea is a hack, but its better than the alternative | 20:33 |
| Martyn | yes | 20:34 |
| Martyn | I really, REALLY want a universal UEFI loader | 20:34 |
| NCommander | Martyn, because most people look at i386, and see how braindead it is | 20:34 |
| NCommander | Martyn, +1. | 20:34 |
| Martyn | for more reasons that one, but I'll -take- a u-boot loaders that works | 20:34 |
| NCommander | Martyn, but even if it exists, there will be a ton of inheta before its standard, and we still have legacy stuff to deal with | 20:34 |
| Martyn | NCommander : New topic for a second | 20:35 |
| Martyn | I have a fullly working image for 9.10 beta on PBX-a9 now | 20:35 |
| NCommander | Martyn, I dunno if I should be happy or scared | 20:35 |
| Martyn | what and to whom do I need to propose something to in order to get an install img for the platform? | 20:35 |
| Martyn | like the dove, and the i.mx51 have now | 20:36 |
| NCommander | Martyn, what bootloader? | 20:36 |
| Martyn | u-boot | 20:36 |
| Martyn | + ARM monitor | 20:36 |
| Martyn | well, other way around | 20:36 |
| Martyn | ARM monitor + u-boot | 20:36 |
| lool | NCommander: To be fair the boot.scr concept comes from beagleboard | 21:43 |
| lool | That's where I got the idea and told you about it | 21:43 |
| NCommander | lool, true, although boot.scr is quite a bit more advanced than the beagle boot system | 21:45 |
| lool | It uses loops but it's the same concept | 21:45 |
| lool | anyway | 21:45 |
| kblin | crap | 22:18 |
| kblin | I think my sheevaplug just died | 22:18 |
| kblin | so much for that piece of hardware | 22:19 |
| hamannp | Ok. I've been trying for days to get a working ARM image with networking based on the tutorial. My last idea is to burn it to cd and boot from that. Anyone know where I can get an .iso version? | 23:03 |
| ali1234 | hamannp: what tutorial? what hardware are you using? | 23:16 |
| hamannp | I've got an amd64 desktop with 4GB of RAM. I want to emulate a couple of ARM machines on my desktop. Here's the basic tut https://wiki.ubuntu.com/ARM/RootfsFromScratch | 23:17 |
| ali1234 | so qemu then... | 23:19 |
| hamannp | Yes, sorry. | 23:19 |
| ali1234 | ok, so at what point does it deviate from what you expect? | 23:20 |
| hamannp | When I boot up, I get at least 4 errors. I about "file system Fusectl not supported" and another about /lib/modules not existing. I get another about this bug : https://bugs.launchpad.net/ubuntu/+source/linux/+bug/346378 | 23:21 |
| ubot4 | Launchpad bug 346378 in linux "net.ipv4.tcp_syncookies is a unknown key (CONFIG_SYN_COOKIES=y missing in ARMEL build config)" [Low,Fix released] | 23:21 |
| ali1234 | ok, well those shouldn't be fatal | 23:22 |
| hamannp | That's good to know. I'm trying to add them to my existing bridge network. br0. When I copy the settings from my amd64 VMs that use that network, I still don't get networking. I thought may be I should fix the boot erros first. | 23:23 |
| ali1234 | well you can fix those by recompiling the kernel with support for those things it is complaining about | 23:23 |
| hamannp | I have been able to log in. May be the machines are working, and the networking problem is something else. | 23:23 |
| ali1234 | i had some problems with networking btw | 23:24 |
| ali1234 | something to do with dns - it just wouldn't work. but specifying ips did | 23:24 |
| hamannp | I'm using ips | 23:24 |
| hamannp | Would any of those problems effect networking? | 23:24 |
| ali1234 | i don't think so | 23:25 |
| ali1234 | they didn't for me, but i'm using real hardware | 23:25 |
| hamannp | Ok. Then I wonder to what to check next. Like I said, I copied over settings from other VMs that use the network fine. | 23:25 |
| ali1234 | qemu VMs? | 23:26 |
| hamannp | I built them using the python.vmbuilder | 23:26 |
| hamannp | FWIW, I have on Sheeva dev kit on my network with the same settings as my other VMs | 23:27 |
| ali1234 | i don't really know what you mean by that | 23:27 |
| hamannp | Sorry kvm. | 23:27 |
| ali1234 | i think you have to configure the bridge on the host machine too | 23:28 |
| ali1234 | the vmbuilder probably does that for you | 23:28 |
| ali1234 | but i don't know because i don't use qemu/kvm | 23:29 |
| hamannp | I've had the host bridge working for 6 months. I have it setup for kvm to automatically add a static ip and configuration for the host bridge network. The hoist side is good. | 23:30 |
| ali1234 | kvm isn't the same thing as qemu-arm | 23:31 |
| ali1234 | so do you see the interfaces on the brctl? | 23:32 |
| hamannp | Yes. Shouldn't it use the same unix networking? Is there something different? | 23:32 |
| hamannp | I don't fully follow you. I setup br0 for static ips in my /etc/network/interfaces file and bring it up automatically. If I do an ifconfig on the host, it shows up. | 23:33 |
| ali1234 | brctl show | 23:34 |
| ali1234 | that will list the interfaces that are part of the bridge | 23:34 |
| hamannp | yes, it shows eth0, which is right. | 23:34 |
| hamannp | it also shows vnet0, not sure what that is. May be default network for kvm???? | 23:35 |
| ali1234 | probably | 23:35 |
| hamannp | Huh. I'm stumped. | 23:35 |
| ali1234 | each virtual machine has it's virtual nic, which has endpoints on both the guest and the host | 23:36 |
| hamannp | Yes. | 23:36 |
| ali1234 | on the host you have to bridge them all together, and with the real eth0 | 23:36 |
| ali1234 | you say you have kvm doing this for you | 23:36 |
| ali1234 | but qemu-arm does not use kvm | 23:36 |
| hamannp | I edited each guest /etc/network/interfaces. Although I've now got it setup so that when I run the build script, it edits them automagically. | 23:37 |
| ali1234 | sure. you you have to configure it in the host too | 23:37 |
| hamannp | I edited the qemu /etc/network/interfaces file manually to have the same settings as the kvm VMs that use the bridge. | 23:37 |
| ali1234 | great | 23:38 |
| ali1234 | that's correct | 23:38 |
| ali1234 | so, which vms are currently running right now on your host? | 23:38 |
| hamannp | I've got a couple of kvm vms running using br0 just fine. I've got a qemu ARM with the same settings, which isn't able to reach the network | 23:39 |
| ali1234 | and all are up and running? | 23:40 |
| ali1234 | what interfaces do you see on ifconfig -a | 23:40 |
| hamannp | Hold on. I'll check. | 23:40 |
| ali1234 | look for tun0 or tap0 or similar | 23:40 |
| hamannp | I don't see tun0 tap0. | 23:41 |
| hamannp | I just see see eth0, vnet0, and br0 on the host | 23:41 |
| ali1234 | how did you launch qemu? | 23:43 |
| hamannp | Hold on. I'll paste the command line. | 23:43 |
| hamannp | qemu-system-arm -M versatilepb -kernel ./vmlinuz-2.6.28-11-versatile -hda qemu-armel-200910011752.img -m 256 -append "root=/dev/sda mem=256M ro" -net nic,macaddr=00:16:3e:00:00:01 -net tap | 23:44 |
| hamannp | May be I see the problem | 23:44 |
| hamannp | Should I have ended it with -net br0? | 23:44 |
| ali1234 | hmm i don't think so | 23:45 |
| hamannp | Ok. stumped again ;) | 23:45 |
| ali1234 | hmm try modprobe tun | 23:45 |
| ali1234 | and then relaunch qemu | 23:45 |
| hamannp | ok | 23:45 |
| ali1234 | this time you should get a tap0 or tun0 to add to br0, and then it should work i think | 23:46 |
| hamannp | ok. It's booting the machine. | 23:47 |
| hamannp | I get a tap0 | 23:47 |
| ali1234 | the if should be up already | 23:47 |
| hamannp | sorry? | 23:48 |
| ali1234 | the interface should get created as soon as qemu starts, i mean | 23:48 |
| ali1234 | the tap0 that is | 23:48 |
| hamannp | ok | 23:48 |
| hamannp | It's there | 23:48 |
| ali1234 | so, now brctl addif br0 tap0 | 23:48 |
| hamannp | ok | 23:48 |
| ali1234 | now it should work :) | 23:49 |
| hamannp | Ok. I'll test here in just a second. | 23:49 |
| hamannp | Btw, qemu boots sloooooooooow | 23:50 |
| ali1234 | well yeah, it's basically an emulator | 23:50 |
| ali1234 | unlike kvm which uses virtualization | 23:50 |
| hamannp | Gotcha. | 23:50 |
| hamannp | I might need to head to my local electronics store (Fry's) and pick up a dozen dev kits. | 23:50 |
| ali1234 | meh. cross compilers and what not... | 23:51 |
| ali1234 | qemu can still be faster than the real hardware sometimes | 23:51 |
| hamannp | I've got the one Sheeva plug dev kit. A little flakey, but fun to play with. | 23:51 |
| ali1234 | no such luck here, i'm hacking on my mobile phone :) | 23:52 |
| hamannp | Have you seen the dual-core Marvell 1.2ghz? | 23:52 |
| ali1234 | i've heard about that stuff but never seen it | 23:52 |
| hamannp | They can take 1GB ram/core | 23:52 |
| hamannp | It works! You're the man! How do I get it to work next time? | 23:54 |
| ali1234 | um..... hang on | 23:54 |
| ali1234 | edit /etc/modules | 23:54 |
| hamannp | host machine? | 23:55 |
| ali1234 | add a line with just tun on it, as per the instructions in the comments | 23:55 |
| ali1234 | yeah, on the host. assuming you use ubuntu | 23:55 |
| hamannp | Of course I use Ubuntu!!!!!!!!!!!!!! All the time ;) | 23:55 |
| ali1234 | and you need to make a script to add the interface to the bridge like it shows on the tutorial | 23:55 |
| hamannp | I think I can do that. | 23:56 |
| hamannp | I should have it from this chat log. | 23:56 |
| hamannp | Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! | 23:56 |
| ali1234 | the /etc/qemu-ifup thing | 23:56 |
| ali1234 | not sure how that works though | 23:56 |
| hamannp | I can do it manually until I figure it our. | 23:57 |
| hamannp | Thanks alot! I'm gonna grab a beer and jump in the hot tub. Literally. You've made my day! | 23:59 |
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