Messages in this thread | | | Date | Wed, 31 Dec 2008 21:30:39 +0300 | From | Cyrill Gorcunov <> | Subject | Re: early exception error |
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[david@lang.hm - Wed, Dec 31, 2008 at 11:12:12AM -0800] > On Wed, 31 Dec 2008, Cyrill Gorcunov wrote: > >> [david@lang.hm - Tue, Dec 30, 2008 at 05:39:29PM -0800] >>> On Wed, 31 Dec 2008, Andi Kleen wrote: >>> >>>> david@lang.hm writes: >>>>> >>>>> doing a grep through System.map for the address that appears in the >>>>> error returns nothing >>>> >>>> This might be obvious, but you can't grep directly for these addresses >>>> because System.map contains the starting addresses of functions only >>>> and normally the reported address is somewhere in the middle of a >>>> function. So you instead have to look for the highest number lower or equal >>>> the address from the exception. >>> >>> thanks, this was not obvious to me >>> >>> the -2 error maps to >>> >>> ffffffff8099e4c1 T free_bootmem_node >>> ffffffff8099e4e5 t alloc_bootmem_core >>> ffffffff8099e774 t ___alloc_bootmem_nopanic >>> >>> >>> the first error maps to >>> >>> ffffffff809c2de4 T free_bootmem_node >>> ffffffff809c2e08 t alloc_bootmem_core >>> ffffffff809c3097 t ___alloc_bootmem_nopanic >>> >>> >>> so it looks like this is in alloc_bootmem_core in both cases. >>> >>> David Lang >>> >> >> Along with Andi's proposed earlyprintk=vga I think >> bootmem_debug option could be usefull here too. > > adding bootmem_debug creates so much additonal output that the oops > scrolls off the screen (except the last 'paragraph' of it) > > it looks like it's individual items being allocated (trying to scan it as > it scrolled by)
on the picture you sent me i noticed the message "Your memory is not aligned you need to rebuild your kernel with bigger NODEMAP SIZE shift=20" and then srat code complains about "No NUMA code hash function found" which looks a bit scary. Btw, could you post this picture on some public resource so NUMA people could check it?
> > if that output is needed I will need to setup a serial console to gather > it (can this be done for the earlyprintk?)
yep, earlyprintk=serial (at least code say it would support it :)
> > David Lang > - Cyrill -
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