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core: add debug log when a job in the activation queue is not runnable

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When a job is skipped due its dependencies not being ready, log
a debug message saying what is holding it back.
This was very useful with transient units timing out to figure
out where the problem was.
This commit is contained in:
Luca Boccassi 2020-04-21 17:28:01 +01:00
parent c5bc2c01ee
commit c03fbd37d6
1 changed files with 10 additions and 2 deletions
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12
src/core/job.c
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@ -516,12 +516,20 @@ static bool job_is_runnable(Job *j) {
return true;
HASHMAP_FOREACH_KEY(v, other, j->unit->dependencies[UNIT_AFTER], i)
if (other->job && job_compare(j, other->job, UNIT_AFTER) > 0)
if (other->job && job_compare(j, other->job, UNIT_AFTER) > 0) {
log_unit_debug(j->unit,
"starting held back, waiting for: %s",
other->id);
return false;
}
HASHMAP_FOREACH_KEY(v, other, j->unit->dependencies[UNIT_BEFORE], i)
if (other->job && job_compare(j, other->job, UNIT_BEFORE) > 0)
if (other->job && job_compare(j, other->job, UNIT_BEFORE) > 0) {
log_unit_debug(j->unit,
"stopping held back, waiting for: %s",
other->id);
return false;
}
return true;
}