config: explain missing forecast jobs#3119
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Add a targeted forecast explanation mode that can answer why an expected job was not scheduled for a tree, branch, platform, or runtime. The debug path builds a forecast graph, evaluates scheduler/job/platform/runtime rules, and reports blocked inputs in reverse from the target node. Use simulated kbuild node data when evaluating downstream tests so rules depending on build parameters, such as LTP rejecting kselftest fragments, are represented in forecast output. Add regression coverage for the LTP syscalls missing-job case. Signed-off-by: Denys Fedoryshchenko <denys.f@collabora.com>
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Add a targeted forecast explanation mode that can answer why an expected job was not scheduled for a tree, branch, platform, or runtime. The debug path builds a forecast graph, evaluates scheduler/job/platform/runtime rules, and reports blocked inputs in reverse from the target node.
Use simulated kbuild node data when evaluating downstream tests so rules depending on build parameters, such as LTP rejecting kselftest fragments, are represented in forecast output. Add regression coverage for the LTP syscalls missing-job case.