Messages in this thread | | | Date | Tue, 16 Jun 2009 14:37:10 -0400 (EDT) | From | Steven Rostedt <> | Subject | Re: problem with function_graph self-test? |
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On Tue, 16 Jun 2009, Jake Edge wrote:
> Hi Steve, > > This has taken me a bit to track down ... I built a kernel from Linus's > git tree (as of this morning: commit > 03347e2592078a90df818670fddf97a33eec70fb) and when i boot it, it locks > up hard giving me a cursor in the upper left (which seems to grow then > shrink once, if that tells anyone anything) and no other output ... i > started messing with kernel params (turning off quiet, rhgb, adding > boot_delay and, eventually figuring out i needed lpj as well) to try > and extract some info ... it seems to reliably fail in the > function_graph tracer self-test with a variety of messages (I > unfortunately don't have a serial console on the laptop that I am > using) ... two of the messages that I got (possibly from different > boots): > > BUG: unable to handle kernel NULL pointer dereference at 00000048 > BUG: Function graph tracer hang! > > I can try and get more information, but I wanted to check first if you > already know about this ... somehow i'll either need to type faster :) > or reliably slow it down and take pictures, which I can do if you'd > like ... > > obviously, for my purposes, i can turn off the selftests and/or the > function_graph tracer ...
No I have not seen this before. Could you send me your config. And if you can take a digital picture of the dump (if one is available) that would also be helpful.
Thanks,
-- Steve
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