NVME-FEAT-INT-VEC(1)

💅 nvme-feat-int-vector-config — bestie edition 🎀

okay so real talk, this little cutie lives in the nvme manual (like, the whole nvme-user suite family), and it's the one you call when you wanna peek at — or totally redo — your interrupt vector configuration feature. yes it's a mouthful, no we're not changing the name, it's iconic. ✨

🌸 SYNOPSIS 🌸

nvme [<global-options>] feat int-vector-config <device>
                        [--iv=<iv> | -i <iv>] [--cd | -c]
                        [--sel=<select> | -S <select>] [--save | -s]

💖 DESCRIPTION 💖

So. This command gets and sets the interrupt vector configuration feature. Both. A dual threat. 👑

The <device> parameter is mandatory, no skipping it bestie — and it can be either the NVMe character device (ex: /dev/nvme0), or a namespace block device (ex: /dev/nvme0n1).

Here's the vibe check on how it decides what to do: if you pass any of the setting options (--iv or --cd), the command will update the interrupt vector configuration. If you pass none of them, it just retrieves and displays the current configuration. literally minding its own business. 🦋

On success it returns 0, error code otherwise.

✨ OPTIONS ✨

• -i <iv>, --iv=<iv> — Interrupt Vector. Tells the command which interrupt vector to use for this configuration. The value is the number of the interrupt vector. simple as that 💅
• -c, --cd — Coalescing Disable. When set, this flag disables interrupt coalescing for the specified interrupt vector. no merging, no combining, we said what we said 🫶
• -S <select>, --sel=<select> — Select (SEL): this field specifies which value of the attributes to return in the provided data:
  • 0 — current — Current
  • 1 — default — Default
  • 2 — saved — Saved
  • 3 — supported — Supported capabilities
• -s, --save — Save the attribute so that it persists through all power states and resets. she stays. she does not leave. 🔥

🧚 GLOBAL OPTIONS 🧚

These ones are defined at the top-level nvme command, and they're available to this subcommand too — shared custody, we love to see it:

• --dry-run — Print the command that would be executed, but do not actually execute it. manifesting without the consequences ✨
• --no-ioctl-probing — Disable probing for 64-bit IOCTL support.
• --no-retries — Disable retry logic on transient errors. one shot, one opportunity 😭
• -o <fmt>, --output-format=<fmt> — Set the reporting format to normal, tabular, 'json, or binary. Only one output format may be used at a time. pick a lane bestie, we can't do all four 💀
• --output-format-version=<version> — Select the output format version. Version 1 uses the original field naming, while version 2 (default) provides more consistent and script-friendly field names. Other versions are rejected. ngl the glow-up is real 🌈
• --quiet — Suppress informational messages. Errors are still reported, and --quiet cancels any --verbose for the library log level. (they fight, only one wins 🥊)
• --set-options=<key=value>[,<key=value>...] — Set libnvme library options for this invocation. Supported keys are force-4k, mi-probe-enabled, test-base-dir and test-sysfs-dir.
• --timeout=<ms> — Set the timeout for the command in milliseconds. infinite or -1 waits without a time limit (0xffffffff). the deadline is fake, time is a construct 🕰️
• -v, --verbose — Increase the level of detail in the output. May be specified multiple times to further increase verbosity. stack it, queen 📚

💡 These options can also be set as machine-wide defaults in nvme-cli.conf(5). A command-line flag always overrides the file — command line is main character energy, the file is just supporting cast. 👑

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🍓 EXAMPLES 🍓

• Has the program issue a feat int-vector-config to get the current configuration:

# nvme feat int-vector-config /dev/nvme0

• Has the program issue a feat int-vector-config to set the interrupt vector and disable coalescing:

# nvme feat int-vector-config /dev/nvme0 --iv=0 --cd --save

💜 NVME 💜

Part of the nvme-user suite. one big happy family 🫶

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and that's the whole page, bestie — no cap, every flag accounted for. 🌟

sign-off szn: this was the NVMe manual, dated 10/30/2026 (mark your calendars 💖), brought to you by NVMe. go forth and configure those interrupt vectors. 💅✨