BLCR 0.5.0 release now available

From: Paul H. Hargrove (PHHargrove_at_lbl_dot_gov)
Date: Fri Mar 02 2007 - 13:32:14 PST

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    After several weeks of betas, I've finally released BLCR 0.5.0.  It can 
    be found at the BLCR Downloads page:
    Below is the NEWS entry, relative to the Nov. 2005 0.4.2 release.
    Before reporting bugs, please read the FAQ to see if you have a known 
    You are receiving this either because you are on the checkpoint_at_lbl_dot_gov
    list, or because you've recently sent email to the list (or me directly)
    asking about BLCR status.
    March 2, 2007
    Functionality and expanded-support release.
      - Expanded kernel coverage
        + 2.6.0 through 2.6.19 for x86 and x86_64
        + 2.4.0 through 2.4.34 for x86 only
      - Multi-process support (related processes and associated pipes)
        + See BLCR_Users_Guide.html and the cr_checkpoint man page
      - Support for 32-bit apps on 64-bit kernels
        + See "--enable-multilib" in BLCR_Admin_Guide.html
      - Support for directories opened with opendir()
      - Support for open()s of /dev/{null,zero,full,random,urandom}
      - Support for checkpoints on Luster file systems
        + Contributed by Dean Luick <luick_at_cray_dot_com>
      - Support for building static libcr
        + Contributed by Dean Luick <luick_at_cray_dot_com>
      - Fixes to many distclean problems
        + Issues identified by Dean Luick <luick_at_cray_dot_com>
      - I/O aggregation for improved performance
        + Contributed by Qi Gao <>
      - Additional examples and test cases
      - API addition: cr_get_restart_info()
      - "Retool" of configure code for ease of addition/maintenance
      - Numerous bug fixes, including:
        + Bug 1240: pid leak on restart failure
        + Bug 1396: SIGPIPE when restarting w/ stdin/out from/to a pipe
        + Bug 1640: context files > 2GB require O_LARGEFILE
        + Bug 1662: context files open R/W leads to restart failure
        + Bug 1669: checkpoint to a socket fails
        + Bug 1807: unrecognized warning suppression flag passed to gcc
        + Bug 1854: libcr link failure w/ stack-protection-enabled gcc
        + Bug 1925: link failure w/ pthread_atfork() on some glibc versions
        + Bug 1933: crash restoring dup of ignored fd (socket or chrdev)
        + Incorrect treatment of certain anonymous mmap() cases
        + MAP_SHARED mmap()ed regions would become MAP_PRIVATE upon restart
          * NOTE: We still fail to restore any sharing among processes
            when using MAP_ANONYMOUS or when mapping an unlinked file.
            However, children fork()ed after a restart will now correctly
            share with their parent.
        + Wrong parent for restored orphans (children of init)
        + dup()ed file descriptors always restored together
    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

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