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2013-06-04xen-blkfront: Introduce a 'max' module parameter to alter the amount of ↵Konrad Rzeszutek Wilk
indirect segments. The max module parameter (by default 32) is the maximum number of segments that the frontend will negotiate with the backend for indirect descriptors. Higher value means more potential throughput but more memory usage. The backend picks the minimum of the frontend and its default backend value. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>