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#uml IRC Logs for 2007-12-06

---Logopened Thu Dec 06 00:00:28 2007
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10:30<jdike-#uml->>Hi guys
10:34<caker-#uml->>Kalimera
10:35|-|da-x_work_ [~karrde@xiv-glob.ser.netvision.net.il] has quit [Remote host closed the connection]
10:35[~]jdike #uml ponders running#uml-> ponders running
10:35<caker-#uml->>hehe
10:41<kokoko1-#uml->>hi all
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12:07<jdike-#uml->>6 more off to akpm
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12:25|-|dgraves_ [~asdf@inet-netcache3-o.oracle.com] has joined #uml
12:25<dgraves_-#uml->>morning all!
12:25<dgraves_-#uml->>jdike, I don't know if this is fixable or not.
12:25<dgraves_-#uml->>When I run that EL5 uml on RHEL4, it gives me:
12:26<dgraves_-#uml->>Program received signal SIGFPE, Arithmetic exception.
12:26<dgraves_-#uml->>0x00beb9e9 in ?? ()
12:26<dgraves_-#uml->>(gdb) bt
12:26<dgraves_-#uml->>#0 0x00beb9e9 in ?? ()
12:26<dgraves_-#uml->>#1 0x00c004f8 in ?? ()
12:26<dgraves_-#uml->>#2 0x00000000 in ?? ()
12:26<jdike-#uml->>fixable
12:26<dgraves_-#uml->>it is?
12:26<jdike-#uml->>yup
12:29[~]dgraves_ #uml isn't finding anything on google.#uml-> isn't finding anything on google.
12:29<dgraves_-#uml->>the only thing i found was you and blaisor talking about this in relation to cow files.
12:29<dgraves_-#uml->>so, oh great and mighty jdike, how would one fix it? :)
12:29<jdike-#uml->>Oh
12:30<jdike-#uml->>you didn't ask that
12:30<dgraves_-#uml->>::LOL::
12:30<dgraves_-#uml->>i know, i know.
12:30<jdike-#uml->>just can it be fixed
12:30<jdike-#uml->>sure it can
12:30<dgraves_-#uml->>i was hoping google would help.
12:30<dgraves_-#uml->>::L::
12:30<dgraves_-#uml->>you're right
12:30[~]dgraves_ #uml flogs himself with a wet noodle for not asking correctly.#uml-> flogs himself with a wet noodle for not asking correctly.
12:30[~]dgraves_ #uml tries again.#uml-> tries again.
12:30<dgraves_-#uml->>Oh, GREAT AND MIGHTY, the provider of answers! the giver of code!
12:31<dgraves_-#uml->>illuminate my poor little brain as to how to not have an exception!!!!
12:31<dgraves_-#uml->>in particular, this exception!
12:33[~]jdike #uml is looking#uml-> is looking
12:35<dgraves_-#uml->>jdike, it doesn't seem to be related to cowing, like the link i found talked about.
12:36<jdike-#uml->>no, it's not
12:36<jdike-#uml->>it's related to the toolchain
12:36<jdike-#uml->>nothing to do with UML
12:36<dgraves_-#uml->>the toolchain i built with?
12:36<dgraves_-#uml->>or the one i'm running with?
12:37<jdike-#uml->>the one you built with
12:37<jdike-#uml->>add --hash-style=sysv to the UML link line
12:38<dgraves_-#uml->>like a LINK_FLAGS type thing?
12:39<jdike-#uml->>to the LINK_WRAPS line in arch/um/Makefile, add
12:39<jdike-#uml->>-Wl,--hash-style=sysv
12:39<dgraves_-#uml->>LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc, -W1, --hash-style=sysv?
12:40<jdike-#uml->>where'd that extra comma come from
12:40<dgraves_-#uml->>-Wl, i mean.
12:40<dgraves_-#uml->>me!
12:40<dgraves_-#uml->>overzealous. :)
12:40<dgraves_-#uml->>what's this doing/
12:41<jdike-#uml->>fixing the build :-)
12:41<dgraves_-#uml->>::L::
12:42<dgraves_-#uml->>thanks.
12:42<jdike-#uml->>BTW, anything you build on RHEL5 and run on RHEL4 will have the same problem
12:42<dgraves_-#uml->>oh? interesting.
12:42<dgraves_-#uml->>what's it from?
12:42<dgraves_-#uml->>the hash for something changed styles?
12:42<jdike-#uml->>they optimized something in a non-backward compatible way
12:43<jdike-#uml->>symbol lookups or something
12:44<dgraves_-#uml->>lovely.
12:44<dgraves_-#uml->>so i'm just passing extra flags to whatever the default linker on EL5 is then?
12:45<jdike-#uml->>yup
12:54<dgraves_-#uml->>well, it seems to be building alright...
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13:01<Magotari-#uml->>If not for cscope I would be losing my mind just about now, trying to get the stack thing right.
13:01<jdike-#uml->>I'm looking at that now
13:03<Magotari-#uml->>Ah. I see. So since you took the job... I think the second argument of show_stack will always be null. I see it called in two places, both use null as the second arg.
13:04<Magotari-#uml->>Oh, and I have not tested that for being true yet, but seems to be when I look at it.
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13:06[~]dgraves_ #uml wonders why the show_stack is all of a sudden coming to such a fan club.#uml-> wonders why the show_stack is all of a sudden coming to such a fan club.
13:07<Magotari-#uml->>I imagine because there is an underlying problem here.
13:08<kokoko1-#uml->>which is best way to find out the pid of a giving process pgrep or pidof ?
13:08<Magotari-#uml->>How many processes?
13:09<Magotari-#uml->>pidof gives you one result, pgrep many.
13:09<kokoko1-#uml->>Magotari, a single process eg a script
13:10<Magotari-#uml->>Ah. I don't know about that. Interpreted languages are tricky because they often run as the name of the interpreter.
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13:11<Magotari-#uml->>I'd go with pgrep. Seems to do the trick well, might be good with searching for a script.
13:13<Magotari-#uml->>Best if you read the man pages and decide for yourself, really.
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13:53<dgraves_-#uml->>jdike, what became of this: http://marc.info/?l=user-mode-linux-devel&m=115125101012707&w=2
13:53<dgraves_-#uml->>I don't see a patch.
13:53<dgraves_-#uml->>but i'm hitting the same error: Starting NFS daemon: [42949437.760000] overflow in relocation type 11 val 8229fa8e
13:53<dgraves_-#uml->>[42949437.760000] `sunrpc' likely not compiled with -mcmodel=kernel
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14:13<jdike-#uml->>I don't see a patch either
14:13|-|kos_tom [~thomas@col31-3-82-247-183-72.fbx.proxad.net] has joined #uml
14:15<dgraves_-#uml->>jdike, i also don't see an indication of what the patch was supposed to be in the email, or any other web searching.
14:15<dgraves_-#uml->>so i'm not sure if -mcmodel=kernel is now viable (or where to apply it to find out)
14:15<dgraves_-#uml->>or if it involved nuking the compare on addresses greater than 2G.
14:18<dgraves_-#uml->>jdike, in fact, the code in 2.6.23.9, looks identical.
14:21<dgraves_-#uml->>Looks like its here: ./arch/x86_64/Makefile:cflags-y += -mcmodel=kernel
14:21<dgraves_-#uml->>should i add it to the arch/um/Makefile, perhaps?
14:23<jdike-#uml->>I don't think so
14:23<jdike-#uml->>can you see if this happens with a stock UML?
14:24<jdike-#uml->>modules have worked fine for you on x86_64, right?
14:24<dgraves_-#uml->>the other modules are working fine on x86_64.
14:24<jdike-#uml->>Oh
14:24<dgraves_-#uml->>or seem to be, at least.
14:25<jdike-#uml->>only that one is different?
14:25<dgraves_-#uml->>its just this particular one.
14:25<dgraves_-#uml->>but i can't say for certain.
14:25<dgraves_-#uml->>i don't think i'm really loading much else in the boot process.
14:25<dgraves_-#uml->>i'm in the process of trying to cleanup the boot so i can login using nis and reset the password.
14:47<jdike-#uml->>Red Hat nash version 5.0.32 starting
14:47<jdike-#uml->>Mounting proc filesystem
14:47<jdike-#uml->>Mounting sysfs filesystem
14:47<jdike-#uml->>Creating /dev
14:47<jdike-#uml->>initrd loading seems fine here
14:47<dgraves_-#uml->>::L::
14:48<dgraves_-#uml->>trying to kill the initrd problem and the sunrpc one at the same time?
14:49<IntuitiveNipple-#uml->>oh, did ferret solve his initrd problem?
14:49<jdike-#uml->>not that I know of
14:49<jdike-#uml->>decided to try it here
14:49<IntuitiveNipple-#uml->>ok
14:49<jdike-#uml->>and I can set all the breakpoints I want
14:50<jdike-#uml->>and the deal with zero-size initrds is that __alloc_bootmem gets very upset when you ask it for no memory
14:50<dgraves_-#uml->>::LOL::
14:50<dgraves_-#uml->>silly.
14:50<IntuitiveNipple-#uml->>well indeed, as it should :)
14:51<jdike-#uml->>and it just hangs because it's early enough that it thinks there's nothing to do but blink LEDs
14:51<jdike-#uml->>134 for (i = 0;;) {
14:51<jdike-#uml->>135 touch_softlockup_watchdog();
14:51<jdike-#uml->>136 i += panic_blink(i);
14:53<dgraves_-#uml->>jdike, well you should get some leds than!
14:53<jdike-#uml->>yeah
14:53[~]dgraves_ #uml thinks that would be a great improvement. have uml "blink some leds".#uml-> thinks that would be a great improvement. have uml "blink some leds".
14:53<jdike-#uml->>pop up a little X window that goes blink blink blink
14:54<dgraves_-#uml->>::LOL::
14:54<dgraves_-#uml->>actually, that could be a great win for uml.
14:54<dgraves_-#uml->>since you could actually give output.
14:54<dgraves_-#uml->>have panic_blink be overloaded to do somethign real, like panic, or something.
14:54<Magotari-#uml->>I want a morse terminal.
14:55<jdike-#uml->>well, actually the real problem is that the UML panic notifier seems not to have been installed by this point
14:55<jdike-#uml->>if it had, there would have been a stack dump and core
14:55<jdike-#uml->>maybe not the stack dump
14:56<dgraves_-#uml->>jdike, yeah, you'd have to overload panic_blink or something.
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14:57<jdike-#uml->>you get off of panic_blink already
14:57<jdike-#uml->>Jeez
14:57<jdike-#uml->>one-track mind
14:57<dgraves_-#uml->>jdike, no!!!! its more fun than stupid sunrpc! :0
14:57<dgraves_-#uml->>its called ADHD hyperfocus!
14:59<jdike-#uml->>uhhh
14:59<jdike-#uml->>that's called the mother of all oxymorons
14:59<dgraves_-#uml->>no, seriously.
14:59<dgraves_-#uml->>part of ADHD is the ability to hyperfocus. basically when you get past the ADHD part of it, you can't *stop* focusing on it.
15:01<dgraves_-#uml->>http://en.wikipedia.org/wiki/Hyperfocus
15:02<jdike-#uml->>oh
15:02<jdike-#uml->>nevermind
15:02<dgraves_-#uml->>:)
15:02<Magotari-#uml->>Sounds like a photography term.
15:02<dgraves_-#uml->>cause wikipedia is always right! :)
15:02<dgraves_-#uml->>magotari, yeah, i know.
15:05<dgraves_-#uml->>jdike, this EL5 uml thing is *really* finicky. needs *just* the right set of options enabled or it won't build.
15:05[~]dgraves_ #uml never wants to do this again.#uml-> never wants to do this again.
15:06<jdike-#uml->>what options break it?
15:06<dgraves_-#uml->>some of the module verify ones. hang on, i'll diff the 2 config files.
15:06<dgraves_-#uml->>i think it was either module_signature or module_verify.
15:10<dgraves_-#uml->>CONFIG_MODULE_SRCVERSION_ALL=y
15:10<dgraves_-#uml->>> CONFIG_MODULE_SIG=y
15:12<dgraves_-#uml->>CONFIG_CRYPTO_SHA1
15:12<dgraves_-#uml->>CONFIG_CRYPTO_SIGNATURE
15:12<dgraves_-#uml->>those 4 seem to cause mostly either compile breakage or linker breakage.
15:12<dgraves_-#uml->>i'm assuming its an EL5 thing.
15:19|-|tyler29 [~tyler@ARennes-257-1-10-136.w81-250.abo.wanadoo.fr] has joined #uml
15:19<dgraves_-#uml->>jdike, the modules seem to work fine in i386 mode. Seems to be just x86_64, from a loose inspection. (ie, nfs came up w\no errors.)
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17:43<Magotari-#uml->>UML can boot raid 1. Impressive.
17:45<jdike-#uml->>what'd you just do?
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18:31<Magotari-#uml->>Momonga is broken, can't boot it on a raid even with only using qemu.
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---Logclosed Fri Dec 07 00:00:04 2007