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SubjectRe: drbd 8.0.2/3 doesn't load under kernel 2.6.21
First, did you confirm this behavior? Can you please explain that? 
How could they possibly interact with one another?

>On Wed, Aug 01, 2007 at 04:21:29PM -0400, Maurice Volaski wrote:
>> I'm making an assumption that depmod is somehow to blame and have logged
>> this as a kernel bug,
>depmod is working fine.
>It's the interaction between your two patches that breaks it for you.
>>>> It turns out I was adding the web100 patch ( to
>>>> the 2.6.21 kernel and that's what causes the symbol resolving problem
>>>> below. Adding the corresponding version of the web100 patch to the
>>>> 2.6.20 kernel makes this problem appear there as well. On fresh
>>>> versions of the kernel, this problem does not occur. At the moment,
>>>> it's not possible to have a current kernel that contains both drbd
>>>> and web100.
>>>>> On a 64-bit Gentoo system with Gentoo's 2.6.21 kernel, drbd 8.0.2/3
>>>>> complains when I try to load the module:
>>>>> [ 134.141363] drbd: Unknown symbol cn_fini
>>>>> [ 134.141399] drbd: Unknown symbol cn_init
>>>>> It works fine when I compile it and load in the previous kernel
>>>>> version, 2.6.20 and the symbols are present in the map file
>>>>> ./ t
>>>>> cn_fini
>>>>> ./ t
>>>>> cn_init
>>>>> I am c'cing the kernel mailing list because this appears to be a
>>>>> problem with how any module accesses symbols in the kernel, not just
>>>> >drbd. Source was compiled with Gentoo gcc-4.1.2, glibc-2.5-r3


Maurice Volaski,
Computing Support, Rose F. Kennedy Center
Albert Einstein College of Medicine of Yeshiva University
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