Re: "Requested kernel interface version is not supported"

From: Paul H. Hargrove (PHHargrove_at_lbl_dot_gov)
Date: Tue Nov 27 2007 - 10:28:32 PST

  • Next message: Dr M. Calleja: "Re: "Requested kernel interface version is not supported""
    Mark Calleja wrote:
    > Hi,
    > I'm trying to get checkpointing using the BLCR kernel modules to work 
    > with Condor (, but I've run into a 
    > hitch. I can get a sample, dynamically linked, x86_64 application to 
    > run and checkpoint successfully using v0.6.1 of the BLCR modules when 
    > run directly from the command line. However, when submitted to the 
    > same machine using Condor via a Parrot shell 
    > (, then although the job 
    > starts running successfully with cr_run, attempts to checkpoint the 
    > job with a separate process using cr_checkpoint fail with the error 
    > message:
    > "Requested kernel interface version is not supported"
    > Is there any reason why this error should occur, especially when 
    > command-line operation on the same box succeeds? BTW, Parrot is used 
    > to provide a user-space file system which talks to a chirp server 
    > ( in order to save the 
    > checkpointed state off the execute host. The tests were carried out on 
    > a Debian "etch" box, kernel  2.6.18-5-amd64, and the application was 
    > built and linked with g++ v 4.1.2.
    > Regards,
    > Mark
      Sorry for the slow response.  I am still catching up on e-mail from 
    the U.S. holiday.
      The message you see indicates a version mismatch between the BLCR 
    library and the BLCR kernel module(s).  Since you can checkpoint at the 
    command line but not with Parrot, I suspect that you may have 2 versions 
    of BLCR installed and that the cr_run and/or cr_checkpoint command in 
    the PATH differs between the two methods.  To confirm this, you could 
    try "cr_run --version" both at the command line and via Parrot.  I 
    suspect they will report different version numbers.  If that is the case 
    you will need to fix your PATH and/or remove the older of the two 
    installations.  If the same version is reported both times, let me know 
    and we can try something else to isolate the cause of your problems.
    Paul H. Hargrove                          PHHargrove_at_lbl_dot_gov
    Future Technologies Group
    HPC Research Department                   Tel: +1-510-495-2352
    Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900

  • Next message: Dr M. Calleja: "Re: "Requested kernel interface version is not supported""