{
  "slug": "zone-write-locking",
  "term": "Zone write locking",
  "aliases": [],
  "definition": "A Linux mechanism that serializes covered write requests to the same sequential zone using a per-zone lock.",
  "note": "The upstream Linux 4.16-6.9 implementation resides in deadline or mq-deadline. Zone write plugging replaces it from Linux 6.10. This is not a global I/O order, a device ownership lock or a persistence guarantee; callers still supply valid offsets.",
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "related": [
    "zone-write-plugging",
    "zoned-block-device",
    "zone-write-pointer"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "updated": "2026-10-16",
  "citations": [
    {
      "id": "linux-ordering-docs",
      "title": "Western Digital, Zoned Storage: Write Ordering Control; locking through Linux 6.9 and plugging from Linux 6.10.",
      "url": "https://zonedstorage.io/docs/linux/sched",
      "accessed": "2026-10-16"
    },
    {
      "id": "linux69-deadline",
      "title": "Linux v6.9, block/mq-deadline.c: deadline_fifo_request, deadline_next_request and request dispatch.",
      "url": "https://github.com/torvalds/linux/blob/v6.9/block/mq-deadline.c",
      "accessed": "2026-10-16"
    },
    {
      "id": "hesela-zns",
      "title": "Hesela: ZNS resource limits and worked examples",
      "url": "https://hesela.com/analyses/zns-open-active-zone-limits/",
      "accessed": "2026-10-16"
    }
  ]
}