doc(v1.7.0): update "Important Notes"

Longhorn 8813

Signed-off-by: Derek Su <derek.su@suse.com>

content/docs/1.7.0/deploy/important-notes/index.md

@@ -22,6 +22,7 @@ Please see [here](https://github.com/longhorn/longhorn/releases/tag/v{{< current
   - [High Availability of Backing Images](#high-availability-of-backing-images)
 - [V2 Data Engine](#v2-data-engine)
   - [Longhorn System Upgrade](#longhorn-system-upgrade)
+  - [Using `vfio_pci` as the Default Userspace I/O Driver for Bare-Metal and Virtualized Environments](#using-vfio_pci-as-the-default-userspace-io-driver-for-bare-metal-and-virtualized-environments)
   - [Introduction of Online Replica Rebuilding](#introduction-of-online-replica-rebuilding)
   - [Block-type Disk Supports SPDK AIO, NVMe and VirtIO Bdev Drivers](#block-type-disk-supports-spdk-aio-nvme-and-virtio-bdev-drivers)
   - [Introduction of Filesystem Trim](#introduction-of-filesystem-trim)
@@ -174,6 +175,10 @@ To address the single point of failure (SPOF) issue with backing images, high av
 
 Longhorn currently does not support live upgrading of V2 volumes. Ensure that all V2 volumes are detached before initiating the upgrade process.
 
+### Using `vfio_pci` as the Default Userspace I/O Driver for Bare-Metal and Virtualized Environments
+
+For improved compatibility with both bare-metal and virtualized environments, it is recommended to use `vfio_pci` as the default Userspace I/O Driver. For more information, see this [link](https://github.com/longhorn/longhorn/issues/8813).
+
 ### Introduction of Online Replica Rebuilding
 
 Online replica rebuilding was introduced in Longhorn 1.7.0, so offline replica rebuilding has been removed.

content/docs/1.7.0/v2-data-engine/prerequisites.md

@@ -27,8 +27,7 @@ Longhorn nodes must meet the following requirements:
   > Memory corruption may occur on hosts using versions of the Linux kernel earlier than 6.7, as highlighted by this SPDK upstream issue: https://github.com/spdk/spdk/issues/3116#issuecomment-1890984674. In Longhorn environment the kernel panic can be caused by prevalent IO timeouts in communications between the nvme-tcp driver and SPDK. Update the Linux kernel on Longhorn nodes to version 6.7 or later to prevent the issue from occurring.
 
 - Linux kernel modules
-  - uio
-  - uio_pci_generic
+  - `vfio_pci`
   - nvme-tcp
 
 - Huge page support

content/docs/1.7.0/v2-data-engine/quick-start.md

@@ -62,8 +62,7 @@ SPDK environment is configured successfully
 Or, you can install them manually by following these steps.
 - Load the kernel modules on the each Longhorn node
   ```
-  modprobe uio
-  modprobe uio_pci_generic
+  modprobe vfio_pci
   ```
 
 - Configure huge pages
@@ -93,7 +92,7 @@ Or, you can manually load `nvme-tcp` kernel module on the each Longhorn node
 
 ### Load Kernel Modules Automatically on Boot
 
-Rather than manually loading kernel modules `uio`, `uio_pci_generic` and `nvme-tcp` each time after reboot, you can streamline the process by configuring automatic module loading during the boot sequence. For detailed instructions, please consult the manual provided by your operating system.
+Rather than manually loading kernel modules `vfio_pci` and `nvme-tcp` each time after reboot, you can streamline the process by configuring automatic module loading during the boot sequence. For detailed instructions, please consult the manual provided by your operating system.
 
 Reference:
 - [SUSE/OpenSUSE: Loading kernel modules automatically on boot](https://documentation.suse.com/sles/15-SP4/html/SLES-all/cha-mod.html#sec-mod-modprobe-d)