[Devel] [user-cr][git]user-cr branch, ckpt-v16-tmp, created. a948c4dfa170040ec5bbdcda398e881ed3b65256

[orenl at cs.columbia.edu]

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The branch, ckpt-v16-tmp has been created
        at  a948c4dfa170040ec5bbdcda398e881ed3b65256 (commit)

- Log -----------------------------------------------------------------
commit a948c4dfa170040ec5bbdcda398e881ed3b65256
Author: Oren Laadan <orenl at cs.columbia.edu>
Date:   Wed Jul 1 06:00:27 2009 -0400

    test/sigpending.c: add test case for pending signals

commit 7933c3e71de3abd48adb848de5d70e369ccdcacc
Author: Sukadev Bhattiprolu <sukadev at linux.vnet.ibm.com>
Date:   Sat Jun 27 12:27:04 2009 -0700

    Use __WALL option in waitpid()
    
    The coordinator creates the children with clone(), so pass the __WALL
    option to waitpid(). Otherwise the waitpid() will fail, and bring the
    container down even as the application is restarting successfully :-)
    
    For instance, if the original app is executed as:
      $ ns_exec -cpuimP pid.ptree1 -- ./ptree1 -n 2 -d 1 -w sleep
    
    Then ns_exec creates the app in new container, with p->exit_signal 0
    for the container-init. Restart correctly restores the exit_signal to
    0. Because of that, we need the coordinator to use __WALL.
    
    Signed-off-by: Sukadev Bhattiprolu <sukadev at us.ibm.com>
    [orenl at cs.columbia.edu: use __WALL in all waitpid() of coordinator]

commit 50dfc2f4ab2856bfa2b3580df2eb65bad71f2561
Author: Oren Laadan <orenl at cs.columbia.edu>
Date:   Sun Jun 28 00:52:51 2009 -0400

    mktree.c: rework the parent-child cleanup/collect logic
    
    Misc fixes to the coodinator <=> root-task logic and, in the pidns
    (where root-task isn't init) to the mktree <=> coordinator logic:
    
    * The ret value of getpid() is cached by libc, but we bypass libc with
     a direct call to clone_with_pids(). Instead use syscall(__NR_pid) to
     always get a fresh ret value.
    
    * Register SIGINT and SIGCHLD handler after forking root-task (and
     coordinator), instead of before. Parent then probes that the newborn
     exists before proceeding.
    
    * Newborn children use prctl(PR_SET_PDEATHSIG...) after they verify
     that the parent is indeed there.
    
    * More complete treatment of waitpid() ret value in sigchld_handler().
    
    Signed-off-by: Oren Laadan <orenl at cs.columbia.edu>

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