The MPIRUN_PROCESSES variable set by the mpi/mvapich plugin probably
is not needed for most if not all recent versions of mvapich.
This environment variable also negatively affects job scalability
since its length is proportional to the number of tasks in a job.
In fact, for very large jobs, the increased environment size can
lead to failures in execve(2).

Since MPIRUN_PROCESSES *might* be required in some older versions of
mvapich, this patch disables the setting of that variable completely
only if SLURM_NEED_MVAPICH_MPIRUN_PROCESSES is not set in the job's
environment. (Thus, by default MPIRUN_PROCESSES is disabled, but
the old behavior may be restored by setting the environment variable
above)

Conflicts:
	META
	NEWS

Command line argument would not be processed, but scontrol would
exit immediately

Conflicts:
	src/scontrol/scontrol.c

The original patch works fine to avoid cancelling a job when all
of it's nodes go unresponsive, but I don't see any way to easily
address nodes coming back into service. We want to cancel jobs
that have some up nodes and some down nodes, but the nodes will
come back into service indivually rather than all at once.

The job will be aborted if any node is set DOWN while responding
or when "scontrol reconfig" is executed or the slurmctld restarts,
but it should respond better to global failures, like the network
going down.

Fix broken build when HAVE_READLINE is false

There are far fewer RPCs not suppored than are supported, so this
should be faster and easier to maintain.

Conflicts:
	src/common/slurm_protocol_util.c

For Slurm, we always want to treat a malloc failure as fatal.

stack.

If sched/backfill starts a job with a QOS having NO_RESERVE and not job
time limit, start it with the partition time limit (or one year if the
partition has no time limit) rather than NO_VAL (140 year time limit);

If a standby job, which in this
case has the NO_RESERVE flag set, is submitted
without a time limit, and is backfilled, it
will get an EndTime waaayyyy into the future.

JobId=99 Name=cmdll
   UserId=eckert(1043) GroupId=eckert(1043)
   Priority=12083 Account=sa QOS=standby
   JobState=RUNNING Reason=None Dependency=(null)
   Requeue=1 Restarts=0 BatchFlag=1 ExitCode=0:0
   RunTime=00:00:14 TimeLimit=12:00:00 TimeMin=N/A
   SubmitTime=2012-12-20T11:49:36 EligibleTime=2012-12-20T11:49:36
   StartTime=2012-12-20T11:49:44 EndTime=2149-01-26T18:16:00

so I looked at the code in /src/plugins/sched/backfill:

                if (job_ptr->start_time <= now) {
                        int rc = _start_job(job_ptr, resv_bitmap);
                        if (qos_ptr && (qos_ptr->flags & QOS_FLAG_NO_RESERVE)){
                                job_ptr->time_limit = orig_time_limit;
                                job_ptr->end_time = job_ptr->start_time +
                                                    (orig_time_limit * 60);

Using the debugger I found that if the job does not have a specified
time limit, the job_ptr->time_limit is equal to NO_VAL when it hits
this code.