Re: [Xen-devel] [PATCH 0/5] xend: Notify xend of udev hardware events

[Zhigang Wang <zhigang.x.wang@xxxxxxxxxx>]

Yosuke Iwamatsu wrote:
> There are several xen-api classes that represent physical devices,
> such as PIF, PPCI and PSCSI. At the initialization step, xend creates
> instances of these classes and stores them, so as to later expose
> the host's available physical resources to remote clients.
> 
> The problem is that, when you hot-add of hot-remove a physical device
> to of from the host, currently there is no way xend can detect that.
> So the physical resource information kept in xend may become inconsistent
> with the real state. 
> 
> This series of patches makes xend get notification of hardware changes
> and update the physical resource information. Inside xend, we runs a thread
> which opens a socket and listens to events of hardware configuration changes
> from udev mechanism.
> 
we already have XendMonitor to do that. Is it right to add these patches?

> For now, these patches only support the configuration change of pci devices,
> but it would be easy to add support for other types of physical devices
> (e.g. net or scsi). 
> 
> Regards,
> -----------------------
> Yosuke Iwamatsu
>         NEC Corporation
> 
> 
> 
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