{
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    "cid": "bafyreidgb37f32sq4pdkvgtsjrsspxa5hv7yl226oltv73dimbtrtnajdq",
    "uri": "at://did:plc:ofn557spu75giuucwbbwb36d/app.bsky.feed.post/3mnl3lxp7lxq2"
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  "path": "/n/2026/06/05/When_idle_isn_t_idle_how_a_Linux_kernel_optimization_became_a_Q.shtml",
  "publishedAt": "2026-06-05T19:37:00.000Z",
  "site": "https://tuxmachines.org",
  "textContent": "we’ll tell the story of a bug in which CUBIC's congestion window (cwnd) gets permanently pinned at its minimum and never recovers from a congestion collapse event",
  "title": "When \"idle\" isn't idle: how a Linux kernel optimization became a QUIC bug"
}