Red Hat ENTERPRISE LINUX 5 - VIRTUALIZATION GUIDE Guide d'installation télécharger pdf (Page 207)

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Warning

Due to interrupt tracking, repeatedly hotplugging or hotunplugging an assigned device more

than 512 times in a brief period of time can cause a kernel error. Please do not repeatedly

hotplug/hotunplug an assigned device.

Note

When running Red Hat Enterprise Linux 5 as a KVM guest, the acpiphp kernel module must

be loaded in the guest to support dynamic addition and removal of PCI devices. This module

enables the guest to receive insertion and removal notifications from qemu. To manually load

this module, run the following command in the guest:

# modprobe acpiphp

To enable this module to be loaded automatically on every guest boot, perform the following

commands in the guest:

# echo 'modprobe acpiphp' > /etc/sysconfig/modules/acpiphp.modules

# chmod +x /etc/sysconfig/modules/acpiphp.modules

After reboot, the module should be loaded and can be confirmed with the lsmod | grep

acpiphp command. More information on persistent module loading in Red Hat Enterprise

Linux 5 can be found in the Red Hat Enterprise Linux 5 Deployment Guide.

⁠Chapt er 1 5. PCI passt hrough

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