| high-rez | Hey guys - i'm seeing a problem with ext3 on ARM. I'm not sure if its hardware or software - but under heavy load I'm getting FS corruption | 06:10 |
|---|---|---|
| Martyn | high-rez : can you categorize the corruption? | 06:22 |
| Martyn | Are you seeing this on the Jaunty Jackalope ARM kernel? | 06:22 |
| Martyn | categorize/quantify | 06:22 |
| high-rez | Correct, jaunty. Essentially under heavy IO load things start to go bad. I ran fsck -y against it and everything was lost :) | 06:23 |
| high-rez | the problem is i don't know how to tell if this is a hardware issue or a software issue. :( | 06:23 |
| Martyn | What steps are needed to reproduce this? Have you dialed it in so that it's repeatable/ | 06:23 |
| Martyn | what platform are you running on? Babbage? Beagle? Other? | 06:24 |
| high-rez | Martyn: I'm trying again. I think I should be able to repro | 06:24 |
| Martyn | What's the platform? | 06:24 |
| high-rez | Beagleboard | 06:24 |
| high-rez | Using an external USB HD (laptop hd connected via a usb converter) | 06:24 |
| Martyn | C3? | 06:25 |
| Martyn | B7? | 06:25 |
| Martyn | C2? | 06:25 |
| high-rez | C.... Let me see which | 06:25 |
| high-rez | C2 pretty sure | 06:25 |
| Martyn | using USB OTG then | 06:25 |
| Martyn | there's a known issue on usb-storage on that platform | 06:25 |
| high-rez | c2 | 06:25 |
| Martyn | You can't be using the stock kernel either then .. you're using a specific Beagle kernel | 06:26 |
| Martyn | which wasn't distributed with Jaunty (since Jaunty was packaged for Babbage board, but not Beagle) | 06:26 |
| high-rez | I believe I am using a beagle specific kernel: beagleboard 2.6.29-oer34 | 06:26 |
| Martyn | Right, but it's not from the Ubuntu distribution, is what I'm pointing at | 06:26 |
| Martyn | there are no official Beagle builds on launchpad .. yet. | 06:27 |
| high-rez | So I'm using the larger USB port, not the smaller one (which I believe is the OTG port) | 06:27 |
| high-rez | Gotcha | 06:27 |
| Martyn | The C2 USB port is suspect | 06:27 |
| Martyn | the C3 USB port is known good | 06:27 |
| high-rez | Ouch :( | 06:27 |
| Martyn | The B7 main USB port was depopulated | 06:27 |
| Martyn | (for that very reason) | 06:27 |
| Martyn | So, it's the underlying USB driver, not the ext3 (or other FS) driver that's likely causing your issue | 06:28 |
| high-rez | Is this a pure hardware issue or do you think a software workaround will be possible ? | 06:28 |
| Martyn | I saw similar "lost and dazed" corruption when I was doing USB ethernet on a C2 | 06:28 |
| high-rez | Understood, and also understood that it's not likely an ubuntu specific issue. | 06:28 |
| Martyn | I don't think anyone's going to bother with a software workaround for the issue | 06:28 |
| high-rez | Yeah.. I've been a bit suspect of this usb port for a bit. | 06:29 |
| Martyn | All the development work for Ubuntu right now is concentrated on the Babbage 2, which is the precursor of the new ARM based netbooks | 06:29 |
| Martyn | I'm working on the Arm Cortex-A9, which is the multi-core ARM chip | 06:29 |
| high-rez | Interesting. I've played a bit with a cortex based system and linux (android on the htc toch pro) | 06:30 |
| Martyn | So there's more work going into the Freescale i.mx51 chip than the OMAP3 + Beagleboard | 06:30 |
| high-rez | Is OMAP3 not considered to be a big contender for next generation netbooks? | 06:30 |
| Martyn | That pretty little beagle of yours is also a Cortex-A8 | 06:30 |
| Martyn | not really. It lacks a lot of support for very basic things netbooks need. | 06:31 |
| Martyn | Like Ethernet | 06:31 |
| high-rez | Yeah, the lack of ethernet is a bit of a bummer. | 06:31 |
| Martyn | Which is why you don't see an ethernet adapter on the Beagleboard (it would cost an extra chip) | 06:31 |
| Martyn | Although it's possible the C4 or C5 will have one, since the next generation of OMAP3 chips may integrate an ethernet MAC | 06:31 |
| high-rez | For which there is no space. :) It's a neat demo "look a whole computer on a board" lacking some modern essentials. | 06:31 |
| Martyn | (but not a PHY) | 06:32 |
| high-rez | Good info, thanks man | 06:33 |
| high-rez | I like seeing how many packages you guys have built for arm | 06:33 |
| high-rez | If my FS hadn't corrupted I guess I'd probably be running right now with gnome on it :) | 06:33 |
| L84Supper | anyone here run into the qreal=double vs float issue with Qt4 for ARM? I have x86 source littered with thousands of doubles vs float. | 21:55 |
| L84Supper | is Ubuntu-ARM mainly aimed at OMAP and iMX? | 21:59 |
| armin76 | L84Supper: s/OMAP// | 22:23 |
| armin76 | well s/OMAP and// :P | 22:24 |
| L84Supper | have you heard what the Freescale iMX netbook are planning on using for a Linux distro? | 22:25 |
| armin76 | nope | 22:25 |
| L84Supper | I'm working with those and Samsung S3C2440 ARM9 | 22:26 |
| L84Supper | waiting for the OMAP 4xxx | 22:27 |
| L84Supper | what's everyone using for OMAP boards? beaglboard? | 22:28 |
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