Messages in this thread | | | Date | Wed, 31 Dec 2008 12:07:33 -0800 (PST) | From | david@lang ... | Subject | Re: early exception error |
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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
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