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12 changes: 11 additions & 1 deletion issues/build/blocking-read-window-reds-beside-other-guests.md
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
---
status: open
status: expected-red
kind: finding
opened: 2026-09-26
---
Expand Down Expand Up @@ -30,6 +30,13 @@ Sightings, all on 2026-09-26:
and each arm's one red is this sentence (`only 26 of 500` on `main`, `only 27
of 500` on the branch; the branch's red spent `cpu=1568ms` and `cpu=1532ms`
of its window). The rate is the same on both arms, so no branch moved it.
- **The orchestrator's Fast tier and nightly for PR #536, both, at `5235eda7`:
2 of 2 red**, `blocking_read_stress: only 28 of 500 round trips completed
inside 3s — a wake was not delivered`.
- **The round-13 reviewer's finding on #536**: the PR leaves the wake and the
pipe path alone, and the two ends spent about 1580 ms of CPU each,
consistent with the actuator's 50 ms holds running out rather than with a
lost wake.

**What the red runs' own logs say against the sentence.** In the 26-of-500
run the two processes spent `cpu=1639ms` and `cpu=1998ms` of the 3.5 s they ran
Expand All @@ -43,3 +50,6 @@ wake does.
progress over the window, not only the count at its end), and a cause for these
runs — a lost wake, or a 3 s budget a starved host cannot meet, and if it is
the budget, the bound derived rather than measured.

This verdict rests on a 3 s duration inside a QEMU test, which the owner rules
is metal-only; PR #562 is removing such verdicts.
4 changes: 4 additions & 0 deletions src/redlist.rs
Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,10 @@ pub struct Disabled {

/// Every disabled test.
pub const DISABLED: &[Disabled] = &[
Disabled {
test: "blocking_read_window",
issue: "issues/build/blocking-read-window-reds-beside-other-guests.md",
},
Disabled {
test: "console_line_atomicity",
issue: "issues/build/console-line-atomicity-loses-five-of-a-thousand-lines-on-ci.md",
Expand Down
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