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doc(1.11.0, 1.10.1): add IOMMU requirement for NVMe disks in interrrupt mode #1212

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Oct 21, 2025
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doc(1.11.0, 1.10.1): add IOMMU requirement for NVMe disks in interrrupt mode #1212

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doc(1.11.0): add IOMMU requirement for NVMe disks in interrrupt mode
c3y1huang Oct 3, 2025
ce62f5c
doc(1.10.1): add IOMMU requirement for NVMe disks in interrrupt mode
c3y1huang Oct 21, 2025
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13 changes: 13 additions & 0 deletions content/docs/1.10.1/v2-data-engine/features/interrupt-mode.md
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,19 @@ Interrupt mode is particularly suitable for clusters with limited CPU resources
- Longhorn v1.10.0 or later
- V2 data engine enabled
- No attached v2 volumes when changing the setting
- For NVMe disks, IOMMU must be enabled. To verify:
```bash
find /sys/kernel/iommu_groups/ -type l
```
Example output (IOMMU enabled):
```
/sys/kernel/iommu_groups/0/devices/0000:e6:0b.1
/sys/kernel/iommu_groups/1/devices/0000:34:0a.6
/sys/kernel/iommu_groups/2/devices/0000:a0:00.0
```
If the command returns no output, IOMMU is not enabled.

For more information, see the official [SPDK documentation](https://spdk.io/doc/system_configuration.html).

## Configuration

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13 changes: 13 additions & 0 deletions content/docs/1.11.0/v2-data-engine/features/interrupt-mode.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,19 @@ Interrupt mode is particularly suitable for clusters with limited CPU resources
- Longhorn v1.10.0 or later
- V2 data engine enabled
- No attached v2 volumes when changing the setting
- For NVMe disks, IOMMU must be enabled. To verify:
```bash
find /sys/kernel/iommu_groups/ -type l
```
Example output (IOMMU enabled):
```
/sys/kernel/iommu_groups/0/devices/0000:e6:0b.1
/sys/kernel/iommu_groups/1/devices/0000:34:0a.6
/sys/kernel/iommu_groups/2/devices/0000:a0:00.0
```
If the command returns no output, IOMMU is not enabled.

For more information, see the official [SPDK documentation](https://spdk.io/doc/system_configuration.html).

## Configuration

Expand Down