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feat(resreq-maxtasks-wiring): add task-count derivation helper

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Adds apply_job_task_count() to overwrite a standalone primary resreq's
minTasks/maxTasks with a job's real requested task count, no-op for
COMPOUND/ALTER nested primaries, with a defensive min>max clamp.
Closes the gap that lets scheduler-allocation's multi-host allocator
ever be reached (bug-1770). Wiring at live ingest call sites follows
in subsequent tasks.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XYdtrEWWZfKRRGED7raEYg
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Rongsong Shen 2026-09-06 03:26:32 +00:00
parent ecfb0a3c64
commit 799a71ecb1
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src/include/resreq.h
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@ -316,4 +316,16 @@ extern int calc_wanted_global_resvals(xvec_idval_t*, var, xlist_t*,
extern int calc_wanted_host_resvals(xvec_idval_t*, var, xlist_t*,
rusage_per_type_t, int, int);
/*
* Overwrite minTasks/maxTasks on resreq's own top-level primary with the
* job's real requested task count. No-op if resreq is NULL or if its
* top-level tag is not XCE_RESREQ_PRIMARY -- a COMPOUND or ALTER resreq's
* nested primaries are left exactly as parse_resreq_primary() set them.
* If mintasks > maxtasks, maxtasks is defensively raised to mintasks
* before assignment (mirrors the apiserver's own convert.go clamp
* direction). Idempotent; never allocates memory.
*/
extern void apply_job_task_count(xce_resreq_t* resreq, uint32_t mintasks,
uint32_t maxtasks);
#endif