Re: [Xen-devel] [VTD][PATCH] Don't allow assigning the same device twice without release the first assignment

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

The DOMCTL_assign_device should check whether the device is already
assigned. This has the benefit that it can atomically check-and-allocate,
under the domctl lock.

You'll have to work out how to propagate DOMCTL_assign_device failure to the
user. Either you have to get the error out of ioemu, or perhaps you can
assign the device in xend before starting ioemu.

 -- Keir

On 15/10/07 16:19, "Han, Weidong" <weidong.han@xxxxxxxxx> wrote:

> System will hang, if assign the same device to domains twice without
> release the first assignment. This patch checks whether the device
> already has been assigned or not before creating domain, if yes, display
> prompt message and won't create the domain.
> 
> Signed-off-by: Weidong Han <weidong.han@xxxxxxxxx>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel



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