| --- | Log | opened Fri Mar 11 00:00:30 2005 |
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| 00:44 | fromz | I'm having trouble with UML and the file system - I keep getting "Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(98,0)" |
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| 00:57 | Newsome | fromz: do you have the corresponding root device inside the filesystem? |
| 00:57 | Newsome | what's the UML distro? |
| 00:59 | fromz | I have no UML distribution, I have root_fs made from dd in the same directory that the UML exists in. |
| 00:59 | schweeb | fromz: be sure that you have the correct nodes in /dev for the type of device that your rootfs is... iirc, major 98 is a ubd |
| 00:59 | schweeb | that's the /dev of the image file itself, not the host system |
| 01:00 | schweeb | also, be sure you have fs support for the type of filesystem it has |
| 01:00 | fromz | yeah, it's ext2 |
| 01:00 | fromz | so where does root_fs need to go? in /dev? |
| 01:00 | Newsome | fromz: No, _inside_ the root_fs |
| 01:00 | fromz | root_fs needs to go inside the root_fs? |
| 01:01 | Newsome | loopback mount the root_fs, then make the devices inside the root_fs in /dev |
| 01:01 | fromz | ok |
| 01:08 | Aiken | Newsome I finished with 15 crashes and this afternoon it works fine with nothing (as far as I know) changed. |
| 01:08 | Newsome | wow |
| 01:08 | Aiken | I think I would rather have the continuing crashes that have something change for no apparent reason |
| 01:08 | Aiken | the only difference I know of is the uptime of the host |
| 01:09 | Newsome | That's very odd. |
| 01:09 | Aiken | I know |
| 01:10 | Newsome | How much memory have you been allocating to the UML? |
| 01:10 | Aiken | 96 meg + 256 swap, host has 512 |
| 01:11 | Newsome | is your /tmp a tmpfs? |
| 01:11 | Aiken | just in case I am going to strip, clean and reseat everything in the computer later today |
| 01:11 | Aiken | yes |
| 01:12 | Newsome | okay, just checking :) |
| 01:13 | Newsome | /tmp wasn't full, was it? |
| 01:13 | Aiken | no |
| 01:14 | Newsome | that is so odd |
| 01:19 | Aiken | this is why I want to have a play with the hardware |
| 01:22 | Aiken | I am sure /tmp was fine |
| 01:23 | Aiken | just to see what happens I mostly filled /tmp then ran the uml |
| 01:23 | Aiken | with tmp full it dies is a far more spectacular fashion than the error message you saw earlier |
| 01:23 | Newsome | heh, I'm not surprised :) |
| 01:26 | Aiken | crash from a full /tmp http://www.pastebin.com/252980 |
| 01:28 | Newsome | wow |
| 01:33 | Aiken | not the same crash as before |
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| 08:20 | alexn | hm which was the latest mainline kernel that worked with um? I just tried 2.6.11 and 2.6.10 and they bomb out during compile |
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| 09:52 | spike | 'afternoon |
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| 11:09 | jdike | hi guys |
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| 11:10 | mikegrb | Hello Jeff |
| 11:11 | timster | :} |
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| 11:21 | bodo | Hi all |
| 11:22 | timster | :} |
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| 11:34 | freddy | Hi all |
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| 12:09 | Blaisorblade_ | | jdike: Hi Jeff! |
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| 12:10 | jdike | Hi Blaisorblade! |
| 12:10 | | Blaisorblade | Jeff |
| 12:10 | | Blaisorblade | About the no-bb patch |
| 12:11 | | Blaisorblade | I said it is plain wrong, and you missed the explaination, it seems |
| 12:11 | jdike | Blaisorblade: you missed my reply, it seems |
| 12:12 | | Blaisorblade | I said that when he enabled static linking, the linking successed for the first symbol, and he got simply a "not exported symbol" for the __gcov_init thing |
| 12:13 | jdike | Blaisorblade: "he" == Anton? |
| 12:14 | | Blaisorblade | Yes |
| 12:16 | | Blaisorblade | Quoting again from his mail (I did it in my latest email, but I think you lost this one): |
| 12:16 | | Blaisorblade | Yes. I finally found a way to get it to compile. Compiling without TT |
| 12:16 | | Blaisorblade | mode and WITHOUT static build it still fails with the same problem |
| 12:16 | | Blaisorblade | (__bb_init_func problem I already reported). But compiling without TT |
| 12:16 | | Blaisorblade | but WITH static build the __bb_init_func problem goes away but instead I |
| 12:16 | | Blaisorblade | get a __gcov_init missing symbol in my modules. |
| 12:16 | jdike | Blaisorblade: Yeah, I'm looking at the same paragraph |
| 12:16 | jdike | Blaisorblade: the problem is, that patch broke things for me |
| 12:17 | | Blaisorblade | I.e. in the first case the build is failing because when doing a dinamic link __bb_init_func is not found (and I verified this is true because libc does not export that in the dynamic case). |
| 12:17 | | Blaisorblade | The patch broke things for you? Yes, this is why I didn't apply that one... but the correct one is still different. With your patch, he will get "unresolved symbols" because of the missing EXPORT_SYMBOL on __bb_init_func |
| 12:18 | jdike | Blaisorblade: he has both __bb_init_func and __gcov_init? |
| 12:18 | | Blaisorblade | Yes. This is the point. He has both. |
| 12:19 | | Blaisorblade | While building statically, he only needs a EXPORT_SYMBOL. |
| 12:19 | jdike | Blaisorblade: OK |
| 12:19 | | Blaisorblade | -> one more EXPORT_SYMBOL, i.e. both ones. |
| 12:19 | jdike | Blaisorblade: then Linus' suggestion of aliasing one to the other is also broken |
| 12:20 | | Blaisorblade | In fact. What we need is a conditional EXPORT_SYMBOL... ok, found how it can be done... |
| 12:20 | | Blaisorblade | You can EXPORT_SYMBOL(__gcov_init), and then give a "weak" definition for it. |
| 12:21 | | Blaisorblade | "weak" definition means that it won't conflict with the real definition. |
| 12:21 | jdike | Blaisorblade: such that if there's a real definition, it overrides the weak definition? |
| 12:21 | | Blaisorblade | Exactly. |
| 12:21 | jdike | Blaisorblade: OK, can you send me a patch? |
| 12:22 | | Blaisorblade | I guess yes... |
| 12:28 | jdike | Blaisorblade: not yet, I've asked for it |
| 12:28 | jdike | oops |
| 12:29 | | Blaisorblade | No problem... I guess I now what's the Oops. |
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| 14:12 | Mephisto | hi |
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| --- | Log | closed Sat Mar 12 00:00:49 2005 |
