[lustre-devel] CentOS 6 - Build problems with kmod

Ben Evans bevans at cray.com
Fri Aug 19 10:29:17 PDT 2016 

kabi-whitelist didn't seem to help for me when I ran into this.

-Ben

On 8/19/16, 1:03 PM, "lustre-devel on behalf of James Simmons"
<lustre-devel-bounces at lists.lustre.org on behalf of
jsimmons at infradead.org> wrote:

>
>> Unfortunately, when I do that, I am apparently still missing something
>>- lustre-osd is not found, and the lustre modules are
>> not found when I try to load them.  (running depmod didn't help there)
>> 
>> Reverting LU-5614 solves this for me, for now.  I'm hoping someone
>>who's still building and installing for CentOS 6 has some
>> insight.
>
>Do you have kabi-whitelist installed? I had a similar problem and if I
>remember right after I installed kabi-whitelist the issues went away.
>Be aware you need the kabi-whitelist for the kernel you are building
>against installed.
>
>> On 08/19/2016 10:27 AM, Patrick Farrell wrote:
>>       Thanks, Ben - That looks likely to work.  Still more than a bit
>>weird.
>> 
>>       Looking at why things are still working internally at Cray for
>>CentOS 6, I think it's because we're not using
>>       lustre.spec (for boring and complicated reasons).
>> 
>>       It seems very likely the problem was introduced by LU-5614 -
>>http://review.whamcloud.com/#/c/12063/
>> 
>>       Is Intel still building and installing on CentOS 6 automatically?
>> Or has all automated testing moved to CentOS 7?
>> 
>>       - Patrick
>>       On 08/19/2016 08:57 AM, Ben Evans wrote:
>>       When I ran into the problem, I did an rpm -I --nodeps and it
>>worked fine.  The errors you are seeing are
>>       dependencies listed in the RPMs, not ones used by the actual
>>.ko's.
>> 
>> I spent some time trying to dig up where the 'kmod-' prefix for all the
>>kernel symbols was getting inserted, but
>> couldn't track it down.
>> 
>> -Ben Evans
>> 
>> From: lustre-devel <lustre-devel-bounces at lists.lustre.org> on behalf of
>>Patrick Farrell <paf at cray.com>
>> Date: Thursday, August 18, 2016 at 6:11 PM
>> To: "Christopher J. Morrone" <morrone2 at llnl.gov>,
>>"lustre-devel at lists.lustre.org" <lustre-devel at lists.lustre.org>
>> Subject: Re: [lustre-devel] CentOS 6 - Build problems with kmod
>> 
>> 
>> Chris,
>> 
>> 
>> I agree with your contention about the kernel symbols, that's why I
>>rebuilt from scratch and reinstalled.  Just
>> did it again.  Still getting the error.
>> 
>> 
>> > It sounds like you built your own kernel.  Did you install all the
>> > resulting kernel packages before building lustre (including any
>> > devel-related packages)?
>> 
>> Yes, but this process doesn't produce anything other than the kernel
>>RPM.
>> 
>> 
>> > Is your custom kernel the newest kernel
>> > installed on your system?
>> 
>> Yes.  It's the newest and it's what's booted.
>> 
>> 
>> So, does anyone have any insight in to what needs to change in the
>>documented build process so I can build and
>> install Lustre on CentOS 6?  (ldisksfs, not ZFS, so I must build the
>>kernel)  It seems likely that I'm missing
>> some symbol RPMs or similar, but kernel-syms is a SuSE only thing, I
>>believe.  I believe Intel is still building
>> and installing ldiskfs Lustre on CentOS 6, so there must be
>>something...?
>> 
>> 
>> - Patrick
>> 
>> 
>>_________________________________________________________________________
>>_____________________________________________________
>> From: lustre-devel <lustre-devel-bounces at lists.lustre.org> on behalf of
>>Christopher J. Morrone <morrone2 at llnl.gov>
>> Sent: Thursday, August 18, 2016 3:44:52 PM
>> To: lustre-devel at lists.lustre.org
>> Subject: Re: [lustre-devel] CentOS 6 - Build problems with kmod
>> On 08/18/2016 01:43 PM, Christopher J. Morrone wrote:
>> > Yes, those instructions should be taken with a huge grain of salt.
>>For
>> > instance, instructions for compiling lustre should really employ a
>> 
>> s/should/should NOT/
>> 
>> > custom user and talk about "useradd" and such.  Also, most users can
>> > skip the whole custom-patched-kernel section.  Hopefully all
>>developers
>> > will be able to stop that too by the time 2.9.0 comes out.
>> >
>> > The error you are seeing almost certainly means that you don't have a
>> > kernel installed that offers symbols compatible with the kernel that
>> > lustre was compiled against.
>> >
>> > It sounds like you built your own kernel.  Did you install all the
>> > resulting kernel packages before building lustre (including any
>> > devel-related packages)?  Is your custom kernel the newest kernel
>> > installed on your system?
>> >
>> > Chris
>> >
>> > On 08/18/2016 01:00 PM, Patrick Farrell wrote:
>> >> Good afternoon,
>> >>
>> >>
>> >> I'm trying to build and install updated Lustre master on CentOS 6 for
>> >> the first time in a month or two, and I'm having trouble.
>> >>
>> >>
>> >> I use the build procedure documented here:
>> >>
>> >> https://wiki.hpdd.intel.com/pages/viewpage.action?pageId=8126821
>> >>
>> >>
>> >> I've got some new kmod-* RPMs, and I need to install those to install
>> >> Lustre, which is fine, except I get a huge string of messages like
>>this
>> >> when I try:
>> >>
>> >> error: Failed dependencies:
>> >>         ksym(__init_waitqueue_head) = 0xffc7c184 is needed by
>> >> kmod-lustre-2.8.56_44_g288e55b_dirty-1.el6.x86_64
>> >>         ksym(__mutex_init) = 0x4bf79039 is needed by
>> >> kmod-lustre-2.8.56_44_g288e55b_dirty-1.el6.x86_64
>> >>
>> >> I've rebuilt and reinstalled my kernel with this latest version of
>> >> Lustre.  Error messages remain the same, and I can't install.
>> >>
>> >>
>> >> Any thoughts or advice?
>> >>
>> >>
>> >> - Patrick
>> >>
>> >>
>> >>
>> >> _______________________________________________
>> >> lustre-devel mailing list
>> >> lustre-devel at lists.lustre.org
>> >> http://lists.lustre.org/listinfo.cgi/lustre-devel-lustre.org
>> >>
>> >
>> > .
>> >
>> 
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