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Re: [Xen-devel] xen-gntdev gets stuck unmapping a 2nd page

On 05/09/14 22:04, Dave Scott wrote:
> Hi,
> I've been playing more with vchan and I think I've hit a bug in xen-gntdev.
> It works ok if I map/unmap in a single page. If I increase the buffer size
> and cause vchan to map a second page (non-contiguous mappings via 2 distinct
> libxc calls), the process gets stuck in disk sleep when unmapping the second
> page. The same happens if I comment out the unmap and let the program exit.
> I'm using a 3.13 kernel:

Can you try the latest kernel?  This looks like it may be a bug in the
generic memory hotplug device driver rather than something specific to


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