[Xen-devel] Limit on the number of grant-table mapped pages

[wei huang <huanwei@xxxxxxxxxxxxxxxxxx>]

Hi list,

I am using xen-3.1 and am particularly interested in the recently added
user-space grant table device. I am trying to build a small communication
channel for passing data among user level processes.

I find that the maximum number pages that can be mapped through the grant
table device is currently hard coded to 128. And I was under the
impression that earlier Xen supports 1k pages (per domain) to be mapped to
other domains in maximum.

Thus, I am asking if it is possible to increase this limit? And if so,
what is the current upper limit that we can mapped from each domain? Or is
it simply a macro define somewhere in the Xen kernel?

Thanks a lot!

-- Wei



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