Xin LI c94526e26d Limit DMA memory to lower addressable 4GB, without this patch, we
can reliably provoke data corruption on systems equipped with a
plenty of memory during high load.

Reported by:	gnn via iXsystems
MFC candidate:	RELENG_7_1, RELENG_7
2008-10-06 22:34:17 +00:00
..