Messages in this thread | | | Date | Wed, 31 Dec 2008 22:12:14 +0300 | From | Cyrill Gorcunov <> | Subject | Re: early exception error |
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[david@lang.hm - Wed, Dec 31, 2008 at 12:07:33PM -0800] > On Wed, 31 Dec 2008, Cyrill Gorcunov wrote: > >> [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? > > http://linux.lang.hm/linux/IMG00030.jpg > > I'll try rebuilding with a bigger nodemap size and let you know > > David Lang >
also you could just pass numa=off and check if it help. (even if it help it would not mean that problem are gone but become hidden)
- Cyrill -
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