Re: Installing BLCR on Lustre Kernel

From: Paul H. Hargrove (PHHargrove_at_lbl_dot_gov)
Date: Mon Apr 06 2009 - 14:45:13 PDT

  • Next message: Karthik Gopalakrishnan: "Re: Installing BLCR on Lustre Kernel"
      As the line in dmesg and your examination of uname and the kernel 
    build dir show, there is a disagreement between the "smp" and "custom" 
    suffix.  As you may have already determined, this it the cause of BLCR's 
    insmod failure.  Now we need to determine the cause of this difference.
      I am guessing from the "el5" in the kernel version string that you are 
    running a RHEL5 distro.  Unfortunately I don't have any similar platform 
    available to examine.  So, I can only guess.
      One possibility that comes to mind is that 
    /lib/modules/2.6.18-92.1.10.el5_lustre.1.6.6smp/build is a symlink into 
    something like 
    /usr/src/kernels/2.6.18-92.1.10.el5_lustre.1.6.6-obj/x86_64/smp.  Such a 
    setup is normal.  However, if somebody has then built a kernel in the 
    same directory, then the files (like utsrelease.h) would end up 
    corresponding to that build (w/ a suffix of "custom") rather than the 
    original one (with a suffix of "smp").  If that is the case, then running
        $ rpm -Vf /lib/modules/2.6.18-92.1.10.el5_lustre.1.6.6smp/build/Makefile
    will produce output indicating files that have changed relative to the 
    ones installed with the kernel-devel (or similar) RPM.  If that is the 
    case, then reinstalling the kernel-devel (or similar) RPM should resolve 
    the problem.
    If the command above produces no output or a message about not belonging 
    to any package, let me know and I'll see what else I can think of.
    Karthik Gopalakrishnan wrote:
    > Hi Paul.
    > I configured & installed BLCR 0.8.1 from source using
    > [root@x4 blcr-0.8.1]# ./configure --prefix=/usr/local/blcr-0.8.1
    > --with-linux=/lib/modules/2.6.18-92.1.10.el5_lustre.1.6.6smp/build/ &&
    > make && make install
    > The build & installation go through fine. When I try to load
    > blcr_imports.ko, I get the following error message in dmesg.
    > "Running kernel UTS_RELEASE (2.6.18-92.1.10.el5_lustre.1.6.6smp) does
    > not match that used to build BLCR
    > (2.6.18-92.1.10.el5_lustre.1.6.6custom)"
    > Additionally,
    > [root@x4 build]# uname -r
    > 2.6.18-92.1.10.el5_lustre.1.6.6smp
    > [root@x4 build]# cat
    > /lib/modules/2.6.18-92.1.10.el5_lustre.1.6.6smp/build/include/linux/utsrelease.h
    > #define UTS_RELEASE "2.6.18-92.1.10.el5_lustre.1.6.6custom"
    > How do I resolve this problem?
    > Thanks & Regards,
    > Karthik
    Paul H. Hargrove                          PHHargrove_at_lbl_dot_gov
    Future Technologies Group                 Tel: +1-510-495-2352
    HPC Research Department                   Fax: +1-510-486-6900
    Lawrence Berkeley National Laboratory     

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