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

[Patrick Farrell]

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.

- Patrick

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 
>> <mailto:lustre-devel-bounces at lists.lustre.org>> on behalf of Patrick 
>> Farrell <paf at cray.com <mailto:paf at cray.com>>
>> Date: Thursday, August 18, 2016 at 6:11 PM
>> To: "Christopher J. Morrone" <morrone2 at llnl.gov 
>> <mailto:morrone2 at llnl.gov>>, "lustre-devel at lists.lustre.org 
>> <mailto:lustre-devel at lists.lustre.org>" 
>> <lustre-devel at lists.lustre.org <mailto: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 
>> <mailto:lustre-devel-bounces at lists.lustre.org>> on behalf of 
>> Christopher J. Morrone <morrone2 at llnl.gov <mailto:morrone2 at llnl.gov>>
>> *Sent:* Thursday, August 18, 2016 3:44:52 PM
>> *To:* lustre-devel at lists.lustre.org 
>> <mailto: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 <mailto:lustre-devel at lists.lustre.org>
>> >> http://lists.lustre.org/listinfo.cgi/lustre-devel-lustre.org
>> >>
>> >
>> > .
>> >
>>
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