22 Jan
2010
22 Jan
'10
5:05 p.m.
On 01/22/2010 12:01 PM, Daniel Veillard wrote:
On Fri, Jan 22, 2010 at 11:40:38AM -0500, Chris Lalancette wrote:
Certain hypervisors (like qemu/kvm) map the PCI bar(s) on the host when doing device passthrough. This can lead to a race condition where the hypervisor is still cleaning up the device while libvirt is trying to re-attach it to the host device driver. To avoid this situation, we look through /proc/iomem, and if the hypervisor is still holding onto the bar (denoted by the string in the matcher variable), then we can wait around a bit for that to clear up.
v2: Thanks to review by DV, make sure we wait the full timeout per-device
<snip>
ACK,
Thanks, pushed. -- Chris Lalancette