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#uml IRC Logs for 2007-12-10

---Logopened Mon Dec 10 00:00:57 2007
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07:00<cl4sh-#uml->>hi all
07:01<Magotari-#uml->>Hello, cl4sh.
07:01<Magotari-#uml->>Name sounds familiar.
07:01<cl4sh-#uml->>:)
07:01<Magotari-#uml->>Ah, yes, the telecomunication student from Gdansk, right?
07:01<cl4sh-#uml->>yes
07:02<cl4sh-#uml->>im back to vnuml
07:02<Magotari-#uml->>Hey. How goes the asterisk(?) project?
07:02<Magotari-#uml->>Oh. Dear.
07:02<cl4sh-#uml->>i run simple asterisk instance under vmware
07:02<cl4sh-#uml->>but it isnot enough to me
07:02<Magotari-#uml->>Right...
07:03<Magotari-#uml->>So what needs doing?
07:03<cl4sh-#uml->>i must build own root_fs
07:03<cl4sh-#uml->>cuz this from vnuml site
07:04<cl4sh-#uml->>havnt headers added
07:04<cl4sh-#uml->>and i cant compile few things to asterisk
07:04<Magotari-#uml->>Hmm...
07:04<Magotari-#uml->>You can attach a tarball to a uml.
07:04<Magotari-#uml->>ubdb=headers.tar.bz2
07:05<cl4sh-#uml->>yes but it is strange kernel
07:05<Magotari-#uml->>Then just dd if=/dev/ubdb of=tarball.tar.bz2
07:05<cl4sh-#uml->>i know thisk solution
07:05<Magotari-#uml->>But it won't work?
07:05<cl4sh-#uml->> 2.6.18.1-bb2-xt-2m
07:05<Magotari-#uml->>Oh.
07:05<Magotari-#uml->>Why that one?
07:06<cl4sh-#uml->>this is the last root_fs to vnuml
07:06<Magotari-#uml->>I meant the kernel.
07:06<cl4sh-#uml->>i was create net which i nedd to experiments
07:06<cl4sh-#uml->>then i can change root_fs
07:07<Magotari-#uml->>Hmm...
07:07<cl4sh-#uml->>maybe You remember how hard was to this things under vnuml :P
07:07<Magotari-#uml->>Yes, I do. A rather sad state of affairs.
07:07<Magotari-#uml->>So default kernel and rootfs.
07:08<Magotari-#uml->>And you need to have headers on the rootfs, right?
07:08<cl4sh-#uml->>yes
07:08<Magotari-#uml->>Have you thought about loopback mounting the rootfs?
07:08<cl4sh-#uml->>sloopback i dont understand
07:09<Magotari-#uml->>mount -o loop rootfs /mnt/
07:09<Magotari-#uml->>Or something to that tune.
07:09<cl4sh-#uml->>universal language
07:09<Magotari-#uml->>?
07:10<cl4sh-#uml->>i must said that i should change root_fs
07:10<Magotari-#uml->>mount -o loop <file> <mountpoint> Then you can copy files back and forth, modifying the rootfs as you wish.
07:10<Magotari-#uml->>Unless I am missing something.
07:11<cl4sh-#uml->>yes i understand
07:11<cl4sh-#uml->>but
07:11<cl4sh-#uml->>i need headers to specific kernel
07:12<Magotari-#uml->>So the problem lies in getting the headers for that kernel? Or getting them into your rootfs?
07:12<Magotari-#uml->>Or something else?
07:12<cl4sh-#uml->>gettin the headers
07:12<cl4sh-#uml->>but
07:12<cl4sh-#uml->>i think ill not get this headers
07:13<cl4sh-#uml->>and should make footfs
07:13<cl4sh-#uml->>rootfs*
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07:13<Magotari-#uml->>Hmm...
07:13<Magotari-#uml->>Let me do a sanity check.
07:14<Magotari-#uml->>You don't want to get just the headers, you want to build a whole new rootfs?
07:14<cl4sh-#uml->>when i can find the headers to 2.6.18.1-bb2-xt-2m
07:14<cl4sh-#uml->>thsi kernel was build by someone from vnuml team
07:14<Magotari-#uml->>First, don't go looking for all that -bb-xt-2m stuff. Just 2.6.18 should do, I think.
07:14<cl4sh-#uml->>ok
07:14<Magotari-#uml->>The headers don't change that much, I don't think.
07:15<cl4sh-#uml->>but i think it wouldnt work fine
07:15<cl4sh-#uml->>but i can search for thata
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07:16<Magotari-#uml->>Try it. The headers really don't change that much. The kernel here seems to me to be patched with bb's patches and some more stuff, but since the headers are used in userspace... I don't think it will be a problem.
07:18<Magotari-#uml->>http://ftp.debian.org/debian/pool/main/l/linux-kernel-headers/
07:18<cl4sh-#uml->>it could be 2.6.18-4?
07:18<Magotari-#uml->>I think so. Stable versions have minimal changes.
07:21<cl4sh-#uml->>okwe'll see
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10:43<jdike-#uml->>Hi guys
10:46<Magotari-#uml->>Hey, jdike. SKAS3 is pretty good.
10:46<jdike-#uml->>yup
10:47<Magotari-#uml->>There ain't kidding about performance. If only you could make some kind of hypocall too, to not reach the host kernel at all... But anyway..
10:48<Magotari-#uml->>I think I took care of one of the FIXMEs, which indeed needed fixing. A buffer of about eight characters and a copy of up to sixteen. But I need to test it, make sure it is ok, and quadruple check my logic...
11:10<jdike-#uml->>hmm
11:10<jdike-#uml->>new_mm just causes crashes
11:10<Magotari-#uml->>Three lines worth of change. One new include for the definition of IFNAMSIZ, one to use IFNAMSIZ instead of whatever it was using before, and one to remove the fixme in a different file. All this assuming I did read things right. I checked three times by now, but I'm just not sure
11:14<jdike-#uml->>whoops
11:14<jdike-#uml->>got the arguments to dup_mmap backwards
11:20<dgraves-#uml->>jdike, that's a feature, right? :)
11:20<jdike-#uml->>no, it's not
11:24<dgraves-#uml->>sure it is.
11:24<dgraves-#uml->>"Correctly identifies mismatched function call arguments and alerts the user in a verbose manner."
11:25<jdike-#uml->>the verbose part is correct
11:25<jdike-#uml->>I don't remember anything being correctly identified, though
11:25<jdike-#uml->>all I remember is my address space vanishing as the empty one was copied into it
11:27<dang-#uml->>jdike: Is it intended that a SKAS3 patched kernel can build as a guest?
11:27<jdike-#uml->>just saw your mail
11:27<jdike-#uml->>UML should still build from a skas-patched tree
11:28<jdike-#uml->>but I don't know how useful it is to want UML to support skas itself
11:28<dang-#uml->>It fails for lack of asm/proc_mm.h...
11:28<jdike-#uml->>at least until UML can nest again
11:28<dang-#uml->>Sure.
11:28<dang-#uml->>I was going to put out a new usermode-sources for gentoo using SKAS3, but I can't unless it can be used as a guest.
11:29<jdike-#uml->>OK, that's just a matter of making an asm-um/proc_mm.h I think
11:29<jdike-#uml->>all it needs to do is include "asm/arch/proc_mm.h"
11:29<dang-#uml->>It should just include asm/arch/proc_mm.h?
11:29<dang-#uml->>'k, I'll try, thanks.
11:29<jdike-#uml->>send me a patch, and I'll drop it into my sources
11:30<dang-#uml->>Needs compat.h too... I'll keep diggin.
11:30<dang-#uml->>er diggin.
11:30<dang-#uml->><sigh> digging
11:33<dang-#uml->>This is a never-ending cycle...
11:40<dang-#uml->>jdike: Not sure it's possible without some refactoring...
11:43<dang-#uml->>proc_mm.h wants compat.h, compat.h wants processor.h, but asm-um/processor.h conflicts with asm-um/arch/processor.h
11:49<Magotari-#uml->>I really could use suspend-to-disk for my UML. I have a long compile going, don't want to axe it and I need the ram for other testing...
11:50<jdike-#uml->>SIGSTOP it and let it be swapped out
11:50<jdike-#uml->>not that STD wouldn't be nice...
11:57<Magotari-#uml->>I'm thinking about it. Seems pretty simple, really. Of course it isn't, the problem lies in me not seeing the problems.
11:58<Magotari-#uml->>Go to a function, writing down the instruction pointer for the place you called the function from. The function copies all ram, the ip and the commandline into a file.
11:58<Magotari-#uml->>Upon restart you read the memory back up, if the commandlines match you put control at the ip.
11:58<Magotari-#uml->>All the while you would need to take care of signals and other stuff during the (un)freezing.
11:58<Magotari-#uml->>I mean, does not sound too hard.
11:59<jdike-#uml->>and open files and subprocesses
11:59<jdike-#uml->>but it's not that hard
11:59<Magotari-#uml->>I guess not. See, I would love to do it myself, but as far as *EVERYTHING IT* goes, I am self-taught.
12:00<Magotari-#uml->>Including programming, algorithms...
12:00<Magotari-#uml->>Everything.
12:00<Magotari-#uml->>So I really suck.
12:06<Magotari-#uml->>I guess I can make a simple prototype outside of UML...
12:32<Magotari-#uml->>jdike: I was just able to bring a stopped uml up with this: sudo uml_mconsole stoptest I_command_you_to_rise
12:32<Magotari-#uml->>Bad commands cause a stopped uml to restatr.
12:32<Magotari-#uml->>Is this by design?
12:32<jdike-#uml->>no
12:32<Magotari-#uml->>(sudo is because I am running it on a real partition)
12:32<Magotari-#uml->>Ok, Gonna fix then.
12:42<Magotari-#uml->>The cause is pretty much same as before. The while loop blocks this time, waits for a command. When the command is not valid or the function does not block... We get a 0 in the loop.
12:42<Magotari-#uml->>Thus the loop is exited.
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12:47<dgraves-#uml->>jdike, it appears to be a skas issue.
12:47<dgraves-#uml->>when i boot the kernel on an EL5 non-skas machine, it hangs at mounting VFS.
12:48<dgraves-#uml->>when i boot it on EL4 skas machine, same FS, it works.
12:48<jdike-#uml->>hmm
12:48<jdike-#uml->>I would have expected it to be the other way around
12:49<dgraves-#uml->>i'm going to reboot my EL4 machine to be non-skas box, and see what happens at some point.
12:51<dgraves-#uml->>jdike, yeah. IntuitiveNipple and i arrived at a similar conclusion friday night, but hadn't tested it yet.
12:52[~]IntuitiveNipple #uml hides#uml-> hides
12:54<jdike-#uml->>does stock 2.6.18 boot?
12:54<jdike-#uml->>as a UML?
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13:00<jdike-#uml->>5 more off to Andrew
13:08<Magotari-#uml->>Juicy speed increase, if I read the patches right. </gentoo user>
13:10<jdike-#uml->>yup
13:11<jdike-#uml->>now all I have to do is reproduce that increase in a form that's acceptable to Linus
13:12[~]Magotari #uml looks at Reiser4 and shivers.#uml-> looks at Reiser4 and shivers.
13:13<Magotari-#uml->>OK, so I think I have the bugfix just about ready, test time now.
13:14<caker-#uml->>jdike: you're on it (Install panic notifier earlier)
13:14<jdike-#uml->>yup and I fixed the empty initrd bug while I was there
13:14<caker-#uml->>yeah .. nice job
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13:47<caker-#uml->>hmm .. I thought this got fixed: http://pastebin.linode.com/79
13:48<caker-#uml->>^-- the skb alloc, uml_net_rx bug
13:51<jdike-#uml->>the possibility of an allocation failure didn't get fixed
13:51<jdike-#uml->>the subsequent hang did get fixed
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13:55<jdike-#uml->>caker, did the thing survive?
13:57<caker-#uml->>hard to say from these logs -- it did keep running although it required a forced shutdown (sysrq)
13:58<caker-#uml->>no timestamps, so it may have been looping that output
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14:13<dgraves_-#uml->>jdike, sorry if i missed a reply to my skas thoughts, had to switch clients.
14:13<dgraves_-#uml->>any thoughts on the matter
14:13<dgraves_-#uml->>?
14:40<cl4sh-#uml->>Magotari: few hours tests and nosolution
14:41<cl4sh-#uml->>Magotari: zaptels source code needs kernel source to work
14:42<dgraves_-#uml->>cl4sh: what is zaptels?
14:42<cl4sh-#uml->>Magotari: modules to asterisk
14:42<cl4sh-#uml->>im tryin to run asterisk under vnuml
14:43<cl4sh-#uml->>but it seems to be really hard quest
14:43<dgraves_-#uml->>jdike: is this the crashme you're always talking about? http://people.delphiforums.com/gjc/crashme.html
14:43<Magotari-#uml->>Yeah, quite a mess, really.
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14:44<cl4sh-#uml->>Magotari: i was tryin to compile kernel source under uml
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14:44<Magotari-#uml->>And failure?
14:44<cl4sh-#uml->>Magotari: but it crash with compiling route.o
14:44<cl4sh-#uml->>Magotari: but it crash with compiling net/route.o
14:44<Magotari-#uml->>What is the error? (pastebin)
14:45<Magotari-#uml->>And why would you want to compile a kernel inside uml?
14:46<cl4sh-#uml->>Magotari: it was about 30 min ago
14:46<Magotari-#uml->>Ah. I see.
14:46<Magotari-#uml->>Nevermind then.
14:46<cl4sh-#uml->>Magotari: cuz i cant under host
14:46<Magotari-#uml->>Why not?
14:46<cl4sh-#uml->>Magotari: under host i ve got really bad messages
14:46<cl4sh-#uml->>moment
14:50<cl4sh-#uml->>http://pastebin.com/m3f553d45
14:50<cl4sh-#uml->>sorry for polish signs my console showits not good
14:51<cl4sh-#uml->>looks like gcc problem?
14:53<Magotari-#uml->>Oh dear.
14:53<cl4sh-#uml->>:)
14:53<Magotari-#uml->>That is a lot of bad messages.
14:53<Magotari-#uml->>Did you mess around with the paths or something?
14:53<cl4sh-#uml->>i cant compile this under host
14:53<cl4sh-#uml->>no
14:53<Magotari-#uml->>Or rather, does your distro have those headers by default?
14:54<Magotari-#uml->>Some might not have then. (Ubuntu, quite notably let me down a few times.)
14:54<cl4sh-#uml->>uhm
14:54<cl4sh-#uml->>maybe i should check
14:54<Magotari-#uml->>Please do.
14:55<Magotari-#uml->>You need one set of libs to run stuff and you need the other to compile stuff.
14:56<dgraves_-#uml->>Magotari, for ubuntu kernel headers, you need to install a -devel package. Same with most distros, actually.
14:56<Magotari-#uml->>I come from Gentoo, would not know. :)
15:01<cl4sh-#uml->>Magotari: for few minutes ill show you log from crashin uml when i try to compile kernel under it
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15:05<dgraves_-#uml->>Magotari, yeah, i come from gentoo as well. but i switched to ubuntu, work in redhat\suse, etc.
15:05<dgraves_-#uml->>so ya eventually learn. :)
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15:12<jdike-#uml->>dgraves, does stock 2.6.18 UML boot?
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15:13<cl4sh-#uml->>Magotari: http://pastebin.com/m5a7c46b0
15:14<jdike-#uml->>I'd get a new gcc
15:15<Magotari-#uml->>Seconded.
15:16<Magotari-#uml->>This kind of error is the fault of the compiler. Get something recent from a stable tree. 4.2.2 is the most recent one, it Works For Me(tm).
15:18<jdike-#uml->>BTW, some quick googling doesn't turn up any examples of this
15:19<cl4sh-#uml->>ive got 4.1.3
15:19<cl4sh-#uml->>how i can upgrade?
15:19<Magotari-#uml->>What distro is inside uml?
15:19<cl4sh-#uml->>i ve got debian on uml
15:20<Magotari-#uml->>And this is the newest they have?
15:20<cl4sh-#uml->>yes
15:20<cl4sh-#uml->>as apt-get said
15:20<cl4sh-#uml->>but this is lenny
15:20<cl4sh-#uml->>testing verison
15:20<cl4sh-#uml->>guys from vnuml create it :P
15:21<Magotari-#uml->>Puzzling.
15:22<Magotari-#uml->>You can compile the compiler, but that is gonna take a mighty while.
15:22<cl4sh-#uml->>why i cant ge it from deb packagae>
15:22<cl4sh-#uml->>?
15:22<Magotari-#uml->>You can. I guess.
15:22<Magotari-#uml->>I don't like debian.
15:22<cl4sh-#uml->>i saw few at ftp.debian.org
15:22<Magotari-#uml->>I don't know much about it, so... Yeah.
15:23<cl4sh-#uml->>but i dont know which package i shoud use
15:23<Magotari-#uml->>4.2.X, the higher X the better.
15:24<cl4sh-#uml->>yes
15:25<cl4sh-#uml->>but when i downloaded 4.2-base_4.2.2-4_i386.deb and make dpkg -i
15:26<cl4sh-#uml->>the version of gcc wouldnt change
15:27<Magotari-#uml->>I don't know debian, so... Someone else?
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15:52<IntuitiveNipple-#uml->>You can control the gcc version by changing the symlink target of /usr/bin/gcc
15:52<IntuitiveNipple-#uml->>e.g:
15:52<IntuitiveNipple-#uml->>$ ls -l /usr/bin/gcc*
15:52<IntuitiveNipple-#uml->>lrwxrwxrwx 1 root root 7 2007-09-05 07:46 /usr/bin/gcc -> gcc-4.1
15:52<IntuitiveNipple-#uml->>-rwxr-xr-x 1 root root 94160 2007-10-03 05:05 /usr/bin/gcc-3.4
15:52<IntuitiveNipple-#uml->>-rwxr-xr-x 1 root root 234896 2007-09-29 12:50 /usr/bin/gcc-4.1
15:56<cl4sh-#uml->>IntuitiveNipple: yes but 4.2 version is not visible there
15:58<IntuitiveNipple-#uml->>If you installed it using dpkg, you can locate it using dpkg-query -L gcc-4.2
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16:00<IntuitiveNipple-#uml->>make sure you've done apt-get install gcc-4.2 (as well as gcc-4.2-base)
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16:05<cl4sh-#uml->>IntuitiveNipple: seems ive got gcc-4.2
16:05<cl4sh-#uml->>IntuitiveNipple: how to make it defauilt
16:05<IntuitiveNipple-#uml->>see what I said earlier "You can control the gcc version by changing the symlink target of /usr/bin/gcc"
16:06<cl4sh-#uml->>IntuitiveNipple: uhm
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16:07<cl4sh-#uml->>ok ive got it
16:07<cl4sh-#uml->>Magotari: im tryin to compile kernel once more time
16:12<cl4sh-#uml->>Magotari: and ive got this same error like under host
16:12<IntuitiveNipple-#uml->>have you done a make mrproper && make oldconfig ?
16:13<IntuitiveNipple-#uml->>(remember to preserve the .config file before mrproper)
16:14<cl4sh-#uml->>ill try it
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16:20<cl4sh-#uml->>make oldconfig gives terrible errors
16:21<cl4sh-#uml->>conclusion its not gcc foult
16:21<IntuitiveNipple-#uml->>errors?
16:22<cl4sh-#uml->>yes
16:22<cl4sh-#uml->>looks like errors from host system
16:23<cl4sh-#uml->>i mean looks this same
16:24<Magotari-#uml->>The host had the header problem, right?
16:24<cl4sh-#uml->>i think so
16:24<Magotari-#uml->>Doubt gcc is at fault for that one.
16:24<IntuitiveNipple-#uml->>http://www.falkotimme.com/howtos/debian_kernel2.6_compile/
16:26<cl4sh-#uml->>ok ill try to do this
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17:31<cl4sh-#uml->>is it possible to compile kernel under uml?
17:32<jdike-#uml->>sure
17:33<cl4sh-#uml->>why i cant do that
17:34<cl4sh-#uml->>i was try 100 times and only got different type of errors
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17:43<jdike-#uml->>what are the errors?
17:44<cl4sh-#uml->>moment i try to compile once again
17:55<cl4sh-#uml->>jdike: http://pastebin.com/m67167fda
17:56<cl4sh-#uml->>looks awful
17:56<jdike-#uml->>give the UML some more memory or some swap
18:17<cl4sh-#uml->>jdike: thx seems work to me
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18:58<cl4sh-#uml->>another problem
18:58<cl4sh-#uml->>when i try to compile zaptel
18:59<cl4sh-#uml->>i ve got errors that theres no faultinfo.h
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19:01<cl4sh-#uml->>also mem.h is missing and ptrace.h,um_uaccess.h,checksum.h and registers.h
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19:15<IntuitiveNipple-#uml->>What .config file are you using?
19:17<cl4sh-#uml->>config faile of guest
19:17<cl4sh-#uml->>file
19:18<cl4sh-#uml->>im lookin in google and there are patches signed by jdike
19:18<IntuitiveNipple-#uml->>did you base it on the one created by make ARCH=um defconfig ?
19:18<cl4sh-#uml->>yes
19:19<cl4sh-#uml->>i need sources of my guest
19:19<cl4sh-#uml->>compiled sources
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19:21<jdike-#uml->>what is zaptel?
19:22<cl4sh-#uml->>drivers to asterisk
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19:23<cl4sh-#uml->>to asterisk hardware
19:23<jdike-#uml->>why do you expect those drivers to work in UML?
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19:24<cl4sh-#uml->>i only want to load one module
19:24<cl4sh-#uml->>i did that under vserver
19:24<cl4sh-#uml->>and i think that under uml i could to
19:26<cl4sh-#uml->>there is something like ztdummy
19:26<jdike-#uml->>vserver runs directly on the hardware
19:26<jdike-#uml->>if ztdummy doesn't require hardware, it should work in UML
19:27<cl4sh-#uml->>i don't know if ztdummy required hardware but when i was run it under vserver i have'nt got hardwer support and it was work
19:28<cl4sh-#uml->>now i cant compile zaptel drivers
19:28<cl4sh-#uml->>cuz of some missing headers
19:28<cl4sh-#uml->>as i saw in google You're write soething about this problems
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19:32<Magotari-#uml->>I am struggling with that resume fix. The idea is simple, but suddenly starts busylooping. Argh. No idea what I am doing wrong. But I will figure it out.
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19:56<IntuitiveNipple-#uml->>Does anyone know, if you've created a tap device, is it possible using setsockopt() to make it deliver IP frames not Ethernet frames? I've got someone swearing blind they can do this
20:02<Magotari-#uml->>I think you can do it, but with a different transport.
20:02<Magotari-#uml->>Yeah, SLIP.
20:03<Magotari-#uml->>No idea if you can do that with tuntap though.
20:07<Magotari-#uml->>Oh...
20:07<Magotari-#uml->>STUPID STUPID MAGOTARI.
20:07<Magotari-#uml->>Of course the thing busyloops, I did not apply my own patches for nonblocking.
20:08<Magotari-#uml->>*groan*
20:11<Magotari-#uml->>Well, that solves it. Since I won't bother with going to school tomorrow, I guess I will send in the patches then.
20:11<Magotari-#uml->>Maybe not the FIXME one, gonna batch those if I can.
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21:29<dang-#uml->>Okay, turns out it wasn't as hard as I thought...
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---Logclosed Tue Dec 11 00:00:52 2007