The parjob plan generator split only maxTasks, so a job submitted with a
task range (minTasks < maxTasks) pended until all maxTasks tasks fit,
even when minTasks did (a tasks 2..5 job pended on a host with 2 free
slots).
The runner now handles a task range in sched_alloc_range_(): it probes
minTasks first and pends after that one search when it does not fit;
otherwise it places maxTasks when that fits, or binary-searches for the
largest count that fits and places it. Fitting is monotone in the count
for balanced plans, so the search is exact for today's plan shapes.
ctx->ntasks carries the count; parjob's job-level pass scales per-task
shared wants and global limits to it, and the generator gets the request
with its task count fixed to it. Fixed counts keep the old path.
The decision trace shows each count tried (task count N (minimum) /
(maximum), placing N tasks) and releases a fitting probe's hosts.
Test fixtures that used minTasks = 1 as filler for an N-task job are now
fixed-count.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Task 2.4: outcome capture moves to sched_trace_outcome.c and the
position/host/summary/rollback half of the model to sched_trace_scan.c;
shared helpers go behind sched_trace_internal.h (sti_ prefix). Code is
moved unchanged; every target that compiles the trace sources gets all
four, and the core isolation scan covers the new files.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Task 1.6: the 27 tests that #include a hooked scheduler source now also
include sched_trace.c and sched_trace_capture.c.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
New alloc_runner.c: sched_allocator_run() validates its inputs (-EINVAL
without touching the pend reason), applies the plugin's optional accepts
guard, creates the pend-reason record, then checks shared resources: one
host-less NO_RESOURCE reason per unmet entry (skip only on vget < 0,
fixing bug-1893) and the met amounts counted once as uncommitted. Plan
search follows in task 3.2. Runner tests use a fake allocator contract;
the pend-reason factory audit now scans the runner.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
