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| 00:34.29 | flyback_ | a shuvel! |
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| 08:15.43 | flyback_ | headbangs to http://youtu.be/TqZ_4SkYAGw |
| 08:17.05 | flyback_ | http://www.youtube.com/redirect?q=http%3A%2F%2F8bc.org%2Fmusic%2Fchipzel%2FTo%2Bthe%2BSky%2F&session_token=casycgFt3xPN4hUMpkfeKz6ogZx8MTMzNzg0NzM1NEAxMzM3NzYwOTU0 |
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| 15:14.56 | prpplague | anyone seen cosmic around lately |
| 15:14.57 | prpplague | ? |
| 15:16.13 | kergoth` | ~seen CosmicPenguin |
| 15:16.25 | purl | cosmicpenguin <~nobody@soa.codeaurora.org> was last seen on IRC in channel #edev, 25d 16h 12m 59s ago, saying: 'bomber'. |
| 15:16.25 | kergoth` | hrm, no bot :) |
| 15:16.32 | kergoth` | ah, just lagged |
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| 15:17.29 | prpplague | oh purl is back |
| 15:17.44 | prpplague | i thought Tim had pulled it from the channel |
| 15:17.56 | prpplague | sends g+ message to cosmic |
| 15:33.58 | *** join/#edev CosmicPenguin (~nobody@soa.codeaurora.org) |
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| 15:36.01 | sjhill | fishsmack purl |
| 15:36.13 | sjhill | wait |
| 15:36.19 | sjhill | fishsmack purl |
| 15:36.26 | sjhill | purl: botsnack |
| 15:36.26 | purl | sjhill: :) |
| 15:36.32 | sjhill | purl: fishsmack |
| 15:36.37 | sjhill | purl: suicide |
| 15:36.37 | purl | ACTION kills herself Juliet style, after seeing sjhill commit suicide |
| 15:37.51 | hackkitten | :o |
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| 16:15.54 | prpplague | CosmicPenguin: hey hey |
| 16:16.20 | prpplague | CosmicPenguin: i think already asked, but checking again, are you headed to plumbers this year? |
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| 16:16.53 | CosmicPenguin | Really good question |
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| 16:17.39 | flyback_ | http://www.ibtimes.com/articles/344145/20120522/thomas-langenbach-sap-arrested-barcode-lego-ebay.htm <---- FAIL |
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| 16:41.49 | CosmicPenguin | prpplague: ping |
| 16:41.54 | prpplague | pong |
| 16:41.58 | prpplague | CosmicPenguin: pong |
| 16:42.02 | prpplague | CosmicPenguin: what up? |
| 16:42.12 | flyback_ | unbelivable prpplague |
| 16:42.20 | flyback_ | he threw away a 24 yr old job position |
| 16:42.26 | flyback_ | what an idiot |
| 16:43.02 | prpplague | flyback_: i try not to be distracted with news items these days as i have enough things to work on and enough things to worry about |
| 16:43.24 | SpeedEvil | People do stupid stuff - this is not news. |
| 16:43.46 | flyback_ | Qantourisc (4e16e19d@gateway/web/freenode/ip.78.22.225.157) has joined #freenode <Qantourisc> Is frenode down ? |
| 16:45.43 | prpplague | SpeedEvil: indeed |
| 16:46.07 | flyback_ | prpplague: I can't wait to play with nxp dip arm chips |
| 16:46.23 | flyback_ | and see how st matches them in their stm32 cortex m0 series |
| 16:46.28 | flyback_ | going to be exciting |
| 16:46.50 | flyback_ | I predict both will do well |
| 16:47.10 | flyback_ | I think it's perfect having both ends oof the cortex line |
| 16:47.44 | flyback_ | cause you can use a really cheap m0 for a RT task that is timing critical but then have a m4 for the main os, etc but the cost is decent |
| 16:47.50 | flyback_ | you know what I mean |
| 16:47.52 | flyback_ | bbl |
| 16:48.13 | flyback_ | m0 as a slave mcu for say the motion of a robot arm joint while the m4 is the brain |
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| 17:27.53 | slashbeast | okey so umount /var/tmp refuse to do as the device is busy, lsof and fuser finds nothing there |
| 17:27.56 | slashbeast | any idea? |
| 17:49.52 | prpplague | slashbeast: could be a symbolic link in there somewhere |
| 17:50.03 | prpplague | slashbeast: that won't be properly reported by lsof |
| 17:51.25 | slashbeast | prpplague: the filesystem was clean, the symlink pointing to /var/tmp? |
| 17:52.01 | prpplague | yes there could be a symlink or some other psuedo fs operations going on |
| 17:52.23 | prpplague | what is /var/tmp being used for? |
| 17:52.46 | slashbeast | general tmpdir, which is preserved between reboots. |
| 17:53.01 | slashbeast | I had to reboot to get rid of it. |
| 17:53.37 | landley | slashbeast: some process has cwd or chroot in it. |
| 17:53.59 | landley | lsof and fuser don't always necessarily check the "." and "/" links of a process. They're in /proc, though. |
| 17:54.18 | slashbeast | I even tried to check /dev/mapper/vg-tmp which is /dev/dm-2 symlink. |
| 17:54.36 | slashbeast | I wonder whats it is, everytime I reboot the /var/tmp cannot be unmounted. |
| 17:54.57 | landley | slashbeast: ls -l /proc/self/cwd and /proc/self/root |
| 17:55.13 | landley | Those can pin filesystems, but they're not "open files" to lsof. |
| 17:56.09 | landley | for i in /proc//[0-9]*; do readlink $i/cwd; readlink $i/root; done |
| 17:57.03 | slashbeast | # ( for i in /proc//[0-9]*; do readlink $i/cwd; readlink $i/root; done ) |grep 'tmp' |
| 17:57.06 | slashbeast | <PROTECTED> |
| 17:57.08 | slashbeast | nothing. |
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| 18:05.57 | slashbeast | landley: is there a way to poke kernel to print whatever is open? |
| 18:06.15 | slashbeast | running find / -type l -print0 | while read -d $'\0' linkpath; do echo -n "$linkpath = " && readlink "$linkpath"; done | grep 'var/tmp' with no luck. |
| 18:18.22 | landley | slashbeast: each process pretty much has those two plus /proc/$$/fd/* |
| 18:18.30 | landley | However, you need to run that as root, not as a normal user. |
| 18:18.35 | landley | Otherwise it'll miss kernel threads and such. |
| 18:19.16 | landley | (Um, I _think_ you get everything at the top level and shouldn't have to look at the /proc/self/task stuff, but I honestly dunno. I don't use threads much.) |
| 18:19.43 | slashbeast | landley: while shutting down, the /var/tmp cannot be unmounted, when everything is already killed. |
| 18:19.49 | landley | In theory you could iterate through /proc/[0-9]*/task/* and that should work either way... |
| 18:19.59 | landley | slashbeast: with just pid 1 still up? |
| 18:20.05 | landley | Something's mounted under it then. |
| 18:20.10 | landley | DId you check /proc/mounts? |
| 18:20.18 | landley | (Never look at /etc/mtab, it's obsolete crap.) |
| 18:20.31 | slashbeast | I did, nothing mounted there |
| 18:20.45 | landley | Huh. That's really weird. |
| 18:20.54 | landley | It's a tmpfs? |
| 18:21.34 | landley | What kind of filesystem is /var/tmp? |
| 18:21.35 | slashbeast | real filesystem. |
| 18:21.41 | slashbeast | ext4 before, reiserfs now |
| 18:21.42 | landley | All filesystems are real filesystems. |
| 18:21.47 | slashbeast | I do use e4rat, maybe thats the rootcase. |
| 18:21.54 | slashbeast | e4rat starts becore init and exec to init. |
| 18:21.54 | landley | Um, you saw the same bug in both? |
| 18:21.57 | slashbeast | yes. |
| 18:22.02 | landley | Because reiserfs hasn't really been maintained since Nina was alive. |
| 18:22.25 | landley | You did a switch to single user mode where your shell is PID 1? |
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| 18:22.45 | slashbeast | no, not really |
| 18:23.09 | landley | See if you can shut down to that point. |
| 18:23.18 | landley | Because it's possible /init has it pinned, although that should show up in /proc. |
| 18:23.23 | landley | (But only if you're root.) |
| 18:23.32 | landley | here, try this... |
| 18:23.46 | slashbeast | I just booted without e4rat and I can easly umount /var/tmp after running system. |
| 18:24.40 | landley | for i in /proc/[0-9]*/task/*; do readlink $i/cwd; readlink $i/root; for j in $i/fd/*; do readlink $j; done; done | grep thingy |
| 18:24.47 | landley | Expect it to take a while... |
| 18:24.58 | landley | What's e4rat? |
| 18:25.32 | slashbeast | its preloader, it does load into memory some files then exec init, system boots much much faster |
| 18:27.31 | landley | You looked at the /proc entries of the e4rat daemon? |
| 18:28.17 | slashbeast | e4rat exists right after init is running, there is no deamon in bg |
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| 18:28.58 | slashbeast | looks like I have to keep my system running for some minutes before it trigger (the /var/tmp lock) |
| 18:31.48 | lawltoad | this probably isn't the exactly right channel, so if theres a better place let me know, but: I was wondering what would be the best way to triangulate a robots position within a set field, Ideally within a centimeter or two |
| 18:32.22 | SpeedEvil | ##electronics |
| 18:32.34 | SpeedEvil | Also - it's a hard unsolved problem if you mean indoors |
| 18:32.52 | SpeedEvil | To clarify - unsolved if you want it cheap and small. |
| 18:33.38 | lawltoad | thanks! and why would indoors be harder |
| 18:33.54 | SpeedEvil | You can't generally use GPS |
| 18:34.21 | lawltoad | so GPS would be the best way |
| 18:34.39 | lawltoad | outside, how accurate can that get? |
| 18:34.49 | SpeedEvil | several milimeters, if you pay enough. |
| 18:35.02 | SpeedEvil | As in ~$10K |
| 18:35.10 | SpeedEvil | And have a nearby base-station |
| 18:36.48 | lawltoad | haha, but in a robot scenario... lets say lawn-mower sized? |
| 18:36.53 | lawltoad | like a few feet |
| 18:36.55 | lawltoad | ? |
| 18:37.20 | SpeedEvil | You can get ~1-2m accuracy with WAAS GPS in good conditions. |
| 18:37.34 | SpeedEvil | This is fine for global navigation in a large lawn - if you have smarts. |
| 18:37.43 | SpeedEvil | It's not adequate for driving round the edges |
| 18:38.15 | lawltoad | ahh |
| 18:38.40 | lawltoad | I dunno why I assumed there was some way to put up beacons and accurately judge distance from them |
| 18:38.49 | lawltoad | too much TV i guess |
| 18:43.23 | SpeedEvil | There is. |
| 18:43.32 | SpeedEvil | But it's generally annoying and not simple. |
| 18:43.55 | SpeedEvil | Ultrasound works. But it varies several percent with temperature and other stuff. |
| 18:44.00 | SpeedEvil | Also wind is a problem |
| 18:44.14 | SpeedEvil | modulated light works - but is annoyingly fast. |
| 18:44.36 | SpeedEvil | Determining accurate bearing and triangulating works, but that's annoying for other reasons. |
| 19:01.10 | lawltoad | is there any standard ways of doing these frustrating task |
| 19:01.40 | lawltoad | or any like... documentation on it being done.. I googled for a whiel finding only the theory |
| 19:07.25 | lawltoad | also... It won't let me talk to ##electrincs and the wiki looks pretty useless/vadalized |
| 19:18.29 | landley | Bwahahaha: http://lwn.net/Articles/498425/ |
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| 21:39.42 | flyback_ | i'm up to 2 former friends slandering me and accusing me of shit on irc, anyone else want their turn so I can go blow my brains out? |
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| 22:13.18 | flyback_ | is not going to kill himself, he's just fed up |
| 23:01.23 | flyback_ | http://science.slashdot.org/story/12/05/23/2058251/return-of-the-vacuum-tube |
| 23:01.24 | flyback_ | whoa |
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