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tests/bcachefs: dev_latency: multi-second reads raise the latency estimate (tools#1089) - #132

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@aderk

@aderk aderk commented Oct 5, 2026

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Reproducer for koverstreet/bcachefs-tools#1089. Expected to fail until fixed.

…imate (tools#1089)

A member behind a 5 s dm-delay: after a dozen reads its read latency
estimate must be over 1.2 s. bch2_latency_acct() truncated the
difference to int, so samples over 2.1 s away from the estimate were
mostly dropped and it stalled around 0.6 s.
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