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scx_layered: Fix consume_preempting() when --local-llc-iteration

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consume_preempting() wasn't teting layer->preempt in consume_preempting()
when --local-llc-iterations ending up treating all layers as preempting
layers and often leading to HI fallback starvations under saturation. Fix
it.
This commit is contained in:
Tejun Heo 2024-11-17 05:54:03 -10:00
parent 51d4945d69
commit 93a0bc9969
1 changed files with 1 additions and 1 deletions
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scheds/rust/scx_layered/src/bpf/main.bpf.c
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@ -1515,7 +1515,7 @@ __weak int consume_preempting(struct cost *costc, u32 my_llc_id)
return -EINVAL;
}
layer = MEMBER_VPTR(layers, [layer_idx]);
if (has_budget(costc, layer) == 0)
if (!layer->preempt || has_budget(costc, layer) == 0)
continue;
dsq_id = layer_dsq_id(layer_idx, llc_id);
if (scx_bpf_consume(dsq_id))